HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news

Cheap flights from Seattle (SEA) to Heathrow (LHR) from $394

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/10. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
SEA — LHR
May 24 — May 311
From?
To?
Fri 5/24
Fri 5/31
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

The best prices from Seattle/Tacoma Intl to London Heathrow are usually found in January or February, booked 75 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday

Cheap flight deals from Seattle to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Heathrow (LHR). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated May 19, 2024.

Popular in

June

Cheapest in

January

Round-trip from

$643

One-way from

$449
High demand for flights, 28% potential price rise
Search Deals
Best time to find cheap flights, 20% potential price drop
Search Deals
From Seattle/Tacoma Intl to London Heathrow
Search Deals
One-way flight from Seattle/Tacoma Intl to London Heathrow
Search Deals

What is the cheapest day to fly round-trip from Seattle to London Heathrow Airport?

Departing on a Tuesday is a good option for securing a great price. You can expect to save up to 13% when planning your travel around this day of the week.

How far in advance should I book a flight from Seattle to London Heathrow Airport?

To save up to 55% on this flight, we recommend booking at least 8 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Seattle to London Heathrow Airport from $646 1-2 weeks out and tickets from $1,159 for flights departing within the next 72 hours.

What is the cheapest month to fly from Seattle to London Heathrow Airport?

The best pricing can be found in the month of November. Prices to London Heathrow Airport from Seattle average $860. You can even find prices in November for less than $860, as users have found deals to London Heathrow Airport from as low as $560. The month of June appears to be one of the more expensive times to travel to London Heathrow Airport from Seattle. Flying in the targeted month can save you up to 39%.

When is the cheapest time to fly from Seattle to London Heathrow Airport (SEA - LHR)?

When flying from Seattle to London Heathrow Airport, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 23% versus a flight in the morning.

Cheap Lufthansa flights from Seattle to Heathrow

Explore cheap flight options specifically provided by Lufthansa for the route between Seattle and Heathrow. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,634,509 searches. Data last updated May 19, 2024.
Take a peek at the cheapest Lufthansa flights we've detected traveling from Seattle to London. Make sure to check back often as deals are often changing.
Tue 10/810:40 amSEA - LHR
1 stop18h 40mLufthansa
Wed 11/132:30 pmLHR - SEA
1 stop32h 01mLufthansa
Deal found 5/18$584
Sun 10/63:10 pmSEA - LHR
1 stop14h 10mLufthansa
Tue 10/1510:50 amLHR - SEA
1 stop14h 09mLufthansa
Deal found 5/17$602
Tue 10/83:10 pmSEA - LHR
1 stop14h 10mLufthansa
Wed 10/166:30 amLHR - SEA
2 stops16h 00mLufthansa
Deal found 5/18$610
Tue 10/83:10 pmSEA - LHR
1 stop14h 10mLufthansa
Fri 10/182:10 pmLHR - SEA
1 stop12h 16mLufthansa
Deal found 5/17$616
Fri 11/19:55 amSEA - LHR
1 stop18h 55mLufthansa
Tue 11/122:30 pmLHR - SEA
1 stop32h 01mLufthansa
Deal found 5/18$634
Fri 9/206:50 pmSEA - LHR
1 stop12h 55mLufthansa
Thu 10/36:30 amLHR - SEA
2 stops16h 00mLufthansa
Deal found 5/18$726

  • If you’re traveling from Seattle to London Heathrow Airport, one of the more common airlines traveling that route is Lufthansa. Seattle to London Heathrow Airport flights are typically 59% more expensive than other airlines traveling the same route. Flights from Lufthansa typically cost $982.93 RT. The cheapest Lufthansa flight found for this route was $637. When traveling from Seattle to London Heathrow Airport on Lufthansa, the most popular airport to depart from is Seattle/Tacoma Intl Airport and the most popular airport to arrive at is London Heathrow Airport. When flying from Seattle to London Heathrow Airport, Lufthansa flights are 5% more popular than any other airline flying that same route.

Cheap Icelandair flights from Seattle to Heathrow

Explore cheap flight options specifically provided by Icelandair for the route between Seattle and Heathrow. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,634,509 searches. Data last updated May 19, 2024.
Some of the best deals we've found on Icelandair flights traveling from Seattle to London. Make sure to examine the flight information before completing your reservation.
Tue 10/293:35 pmSEA - LHR
1 stop12h 20mIcelandair
Tue 11/128:25 pmLHR - SEA
1 stop28h 35mIcelandair
Deal found 5/18$586
Tue 10/83:50 pmSEA - LHR
1 stop12h 05mIcelandair
Fri 10/181:05 pmLHR - SEA
1 stop12h 50mIcelandair
Deal found 5/17$605
Sun 10/63:50 pmSEA - LHR
1 stop20h 30mIcelandair
Wed 10/169:25 pmLHR - SEA
1 stop28h 30mIcelandair
Deal found 5/17$611
Mon 10/73:50 pmSEA - LHR
1 stop12h 05mIcelandair
Fri 10/111:05 pmLHR - SEA
1 stop12h 50mIcelandair
Deal found 5/18$624
Fri 10/253:50 pmSEA - LHR
1 stop12h 05mIcelandair
Mon 11/118:25 pmLHR - SEA
1 stop28h 35mIcelandair
Deal found 5/18$632
Tue 9/106:55 pmSEA - LHR
1 stop17h 25mIcelandair
Wed 10/29:25 pmLHR - SEA
1 stop31h 10mIcelandair
Deal found 5/18$638
Sun 8/1111:00 pmSEA - LHR
1 stop28h 55mIcelandair
Sun 9/229:25 pmLHR - SEA
1 stop31h 10mIcelandair
Deal found 5/18$645
Sun 9/811:00 pmSEA - LHR
1 stop13h 20mIcelandair
Mon 9/169:25 pmLHR - SEA
1 stop31h 10mIcelandair
Deal found 5/17$646
Thu 9/196:55 pmSEA - LHR
1 stop17h 25mIcelandair
Thu 9/269:25 pmLHR - SEA
1 stop28h 30mIcelandair
Deal found 5/18$648

  • One of the most popular airlines traveling from Seattle to London Heathrow Airport is Icelandair. Seattle to London Heathrow Airport flights are typically 46% cheaper than other airlines traveling the same route. Flights from Icelandair typically cost $1,262.70 RT. The cheapest Icelandair flight found for this route was $1,016. The most popular departure airport in Seattle when flying to London Heathrow Airport is Seattle/Tacoma Intl Airport. The most popular airport to fly into when visiting London Heathrow Airport is London Heathrow Airport. When flying from Seattle to London Heathrow Airport, Icelandair flights are 5% more popular than any other airline flying that same route.

Cheap Seattle to Heathrow flights in May & June 2024

Find cheap flight options from Seattle to Heathrow specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,634,509 searches. Prices were last updated on May 19, 2024.
Listed are some of the best fares we've found on flights departing from Seattle to London in 2024. More deals are always being added, so be sure to check back regularly.
Mon 5/201:30 pmSEA - LHR
1 stop12h 30mKLM
Tue 6/184:50 pmLHR - SEA
Nonstop10h 20mKLM
Deal found 5/17$705
Tue 5/211:22 pmSEA - LHR
1 stop15h 23mBritish Airways
Tue 6/49:50 amLHR - SEA
Nonstop9h 45mBritish Airways
Deal found 5/17$748
Tue 5/211:22 pmSEA - LHR
1 stop15h 23mBritish Airways
Tue 6/49:50 amLHR - SEA
Nonstop9h 45mBritish Airways
Deal found 5/18$749
Sun 5/195:44 amSEA - LHR
1 stop20h 41mUnited Airlines
Tue 6/410:50 amLHR - SEA
1 stop14h 09mUnited Airlines
Deal found 5/18$758
Tue 5/2112:50 pmSEA - LHR
1 stop15h 30mUnited Airlines
Tue 6/410:50 amLHR - SEA
1 stop14h 09mUnited Airlines
Deal found 5/17$763
Sun 5/195:00 amSEA - LHR
2 stops17h 35mUnited Airlines
Tue 6/49:00 amLHR - SEA
1 stop15h 59mUnited Airlines
Deal found 5/18$764
Tue 5/219:10 pmSEA - LHR
Nonstop9h 40mDelta
Thu 5/3011:30 amLHR - SEA
1 stop14h 10mDelta
Deal found 5/18$765
Tue 5/219:10 pmSEA - LHR
Nonstop9h 40mDelta
Fri 5/316:15 amLHR - SEA
1 stop13h 05mDelta
Deal found 5/18$766
Tue 5/219:10 pmSEA - LHR
Nonstop9h 40mDelta
Wed 5/2911:45 amLHR - SEA
1 stop12h 55mDelta
Deal found 5/18$768

Seattle to Heathrow 2024 flight deals

Discover exclusive flight deals for travel between Seattle and Heathrow in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,634,509 searches. Data last updated May 19, 2024.
Listed are some of the best fares we've found on flights departing from Seattle to London in 2024. More deals are always being added, so be sure to check back regularly.
Tue 10/81:10 pmSEA - LHR
1 stop16h 10mLufthansa
Wed 11/132:30 pmLHR - SEA
1 stop32h 01mLufthansa
Deal found 5/17$584
Wed 11/202:35 pmSEA - LHR
1 stop12h 20mIcelandair
Tue 12/38:25 pmLHR - SEA
1 stop28h 35mIcelandair
Deal found 5/17$586
Tue 11/52:35 pmSEA - LHR
1 stop12h 20mIcelandair
Tue 11/128:25 pmLHR - SEA
1 stop28h 35mIcelandair
Deal found 5/17$587
Sun 9/296:55 pmSEA - LHR
1 stop33h 00mIcelandair
Wed 10/91:05 pmLHR - SEA
1 stop12h 50mIcelandair
Deal found 5/17$590
Tue 9/246:55 pmSEA - LHR
1 stop17h 25mIcelandair
Tue 10/89:25 pmLHR - SEA
1 stop28h 30mIcelandair
Deal found 5/17$592
Mon 12/23:20 pmSEA - LHR
Nonstop9h 25mVirgin Atlantic
Tue 12/1011:35 amLHR - SEA
Nonstop9h 55mVirgin Atlantic
Deal found 5/17$593
Tue 10/17:40 amSEA - LHR
1 stop14h 50mMultiple Airlines
Tue 10/228:40 amLHR - SEA
2 stops17h 46mMultiple Airlines
Deal found 5/17$599
Tue 10/110:40 amSEA - LHR
2 stops15h 20mMultiple Airlines
Wed 10/308:50 amLHR - SEA
2 stops19h 24mMultiple Airlines
Deal found 5/18$600
Sun 11/33:20 pmSEA - LHR
1 stop12h 30mLufthansa
Thu 11/1411:10 amLHR - SEA
1 stop13h 55mLufthansa
Deal found 5/16$601

Non-stop flights to Heathrow from Seattle

Discover non-stop flight options from Seattle to Heathrow. Find direct flights with no layovers, providing a convenient travel experience. Explore non-stop flight options based on user searches, and compare prices and availability for your desired travel dates. Over the last 7 days, Cheapflights users made 2,634,509 searches. Data last updated May 19, 2024.
To help reduce your travel time, choose from one of these non-stop flights from Seattle to London. Search for alternative flights from Seattle to London by utilizing the search form above.
Sun 10/61:40 pmSEA - LHR
Nonstop9h 20mBritish Airways
Tue 10/159:50 amLHR - SEA
Nonstop9h 45mBritish Airways
Deal found 5/17$616
Thu 9/199:15 pmSEA - LHR
Nonstop9h 35mKLM
Tue 12/174:35 pmLHR - SEA
Nonstop10h 25mKLM
Deal found 5/18$666
Mon 8/267:40 pmSEA - LHR
Nonstop9h 20mBritish Airways
Tue 9/174:00 pmLHR - SEA
Nonstop9h 45mBritish Airways
Deal found 5/18$693
Sun 8/119:15 pmSEA - LHR
Nonstop9h 35mDelta
Thu 8/294:50 pmLHR - SEA
Nonstop10h 25mDelta
Deal found 5/18$694
Sat 10/194:30 pmSEA - LHR
Nonstop9h 20mVirgin Atlantic
Mon 10/2811:35 amLHR - SEA
Nonstop9h 55mVirgin Atlantic
Deal found 5/18$699
Tue 8/137:40 pmSEA - LHR
Nonstop9h 20mBritish Airways
Wed 8/289:50 amLHR - SEA
Nonstop9h 45mBritish Airways
Deal found 5/18$712
Fri 10/47:40 pmSEA - LHR
Nonstop9h 20mBritish Airways
Mon 10/149:50 amLHR - SEA
Nonstop9h 45mBritish Airways
Deal found 5/18$715
Sat 9/219:15 pmSEA - LHR
Nonstop9h 35mKLM
Mon 9/304:50 pmLHR - SEA
Nonstop10h 30mKLM
Deal found 5/17$716
Fri 8/231:30 pmSEA - LHR
Nonstop9h 20mBritish Airways
Thu 8/299:45 amLHR - SEA
Nonstop9h 45mBritish Airways
Deal found 5/18$730

Seattle to Heathrow flights leaving soon

Find last-minute flight options from Seattle to Heathrow for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 2,634,509 searches. Data last updated May 19, 2024.
Have a look at some of the flights available from Seattle to London departing last-minute. It's wise to confirm all flight details are correct before booking.
Sat 5/257:05 pmSEA - LHR
3 stops33h 00mMultiple Airlines
Fri 5/317:05 amLHR - SEA
3 stops33h 40mMultiple Airlines
Deal found 5/17$924
Sun 5/265:50 amSEA - LHR
2 stops22h 15mMultiple Airlines
Thu 6/65:00 pmLHR - SEA
3 stops32h 40mMultiple Airlines
Deal found 5/16$950
Sat 5/257:05 pmSEA - LHR
2 stops33h 00mMultiple Airlines
Fri 5/317:05 amLHR - SEA
3 stops33h 40mMultiple Airlines
Deal found 5/17$957
Sun 5/265:50 amSEA - LHR
2 stops22h 15mMultiple Airlines
Thu 5/306:40 amLHR - SEA
3 stops21h 55mMultiple Airlines
Deal found 5/17$960
Sun 5/269:39 pmSEA - LHR
1 stop28h 56mMultiple Airlines
Wed 5/296:40 amLHR - SEA
2 stops36h 40mMultiple Airlines
Deal found 5/18$964
Sat 5/256:50 amSEA - LHR
2 stops18h 05mMultiple Airlines
Wed 5/299:55 amLHR - SEA
2 stops20h 27mMultiple Airlines
Deal found 5/17$967
Fri 5/247:05 pmSEA - LHR
3 stops30h 55mMultiple Airlines
Fri 5/317:05 amLHR - SEA
3 stops33h 40mMultiple Airlines
Deal found 5/17$974
Mon 5/277:00 amSEA - LHR
1 stop21h 05mMultiple Airlines
Wed 5/296:40 amLHR - SEA
2 stops36h 40mMultiple Airlines
Deal found 5/18$980
Mon 5/273:50 pmSEA - LHR
1 stop20h 30mIcelandair
Tue 6/49:25 pmLHR - SEA
1 stop21h 55mIcelandair
Deal found 5/17$981

One-way flights to Heathrow from Seattle

Search for one-way flight options from Seattle to Heathrow. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 2,634,509 searches. Data last updated May 19, 2024.
Some of the best available deals we've found on one-way flights from Seattle to London. Those seeking round-trip flights from Seattle to London should utilize the search form at the the top of the page.
Sat 8/1011:00 pmSEA - LHR
1 stop13h 20mIcelandair
Deal found 5/18$394
Sat 7/276:55 pmSEA - LHR
1 stop33h 00mIcelandair
Deal found 5/18$396
Wed 7/33:50 pmSEA - LHR
2 stops15h 50mMultiple Airlines
Deal found 5/18$411
Thu 7/2511:00 pmSEA - LHR
1 stop28h 55mIcelandair
Deal found 5/18$416
Tue 7/307:00 amSEA - LHR
2 stops27h 35mMultiple Airlines
Deal found 5/18$420
Thu 8/151:50 pmSEA - LHR
2 stops24h 45mMultiple Airlines
Deal found 5/18$423
Mon 7/227:00 amSEA - LHR
3 stops30h 45mMultiple Airlines
Deal found 5/18$425
Sat 6/229:18 pmSEA - LHR
2 stops54h 52mMultiple Airlines
Deal found 5/18$426
Sun 6/23:30 pmSEA - LHR
3 stops46h 05mMultiple Airlines
Deal found 5/18$427

Find flights from Seattle to Heathrow within your budget

Customize your flight search to find flights from Seattle to Heathrow that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,634,509 searches. Data last updated May 19, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$584 - $666

Route

Depart

Return

Price

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 10/8

1 stop18h 40m

London Heathrow

Wed 11/13

1 stop32h 01m

$584

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 10/29

1 stop12h 20m

London Heathrow

Tue 11/12

1 stop28h 35m

$586

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Sun 10/20

2 stops15h 20m

London Heathrow

Wed 10/30

2 stops19h 24m

$599

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 10/15

1 stop13h 00m

London Heathrow

Tue 10/29

1 stop13h 55m

$607

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Mon 10/7

Nonstop9h 20m

London Heathrow

Thu 10/17

1 stop13h 05m

$609

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Sun 10/13

2 stops24h 35m

London Heathrow

Mon 10/21

2 stops38h 21m

$618

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Tue 10/8

1 stop14h 25m

London Heathrow

Wed 10/16

Nonstop9h 45m

$619

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Thu 10/17

2 stops15h 20m

London Heathrow

Thu 10/31

2 stops19h 24m

$649

Seattle/Tacoma IntlLondon Heathrow

SEA - LHR

SEALHR

Seattle/Tacoma Intl

Fri 10/4

Nonstop9h 20m

London Heathrow

Fri 10/18

Nonstop9h 45m

$666

Flights are sorted by cheapest first

Deals found on 5/18

When is the best time to book a flight from Seattle to London Heathrow Airport?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Heathrow. Price data was last updated on May 10, 2024.
Booking 75 days in advance of your planned departure date is, on average, the best time to get cheap flights from Seattle to London Heathrow Airport. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
Search Deals

When is the cheapest time to fly from Seattle to London Heathrow Airport?

Use this chart to determine the cheapest time to fly round-trip from Seattle to Heathrow. Price data was last updated on May 12, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Seattle to London Heathrow Airport flight should consider departing on Sunday at noon when fares are most often at their lowest. Thursday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
Search Deals

Average price of flights to Heathrow by month

Plan your trip from Seattle to Heathrow by taking into account the cheapest months to travel. The average price of a one-way flight from Seattle to Heathrow is currently $415 while a round-trip flight costs $615. Price data was last updated on May 12, 2024.

Currently, November is the cheapest month in which you can book a flight from Seattle to London Heathrow Airport (average of $653). Flying from Seattle to London Heathrow Airport in June is currently the most expensive (average of $1,150). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

January

$673

February

$662

March

$715

April

$692

May

$733

June

$1,150

July

$976

August

$775

September

$745

October

$708

November

$653

December

$672

Temperature and rainfall in Heathrow by month

Plan your trip to Heathrow by taking into account the average temperature and rainfall totals by month.

LON

Temperature

39.2 - 62.6 °F

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Heathrow. Reviews last updated May 19, 2024.
Peruse reviews from past customers who have flown with Lufthansa, Icelandair and United Airlines from Seattle to London to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
10,647 reviews
Check prices

Comfort

7.9

Overall

8.0

Food

7.4

Entertainment

8.0

Boarding

8.2

Crew

8.6

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Delta
8.0
Very good
10,647 reviews
Delta
8.0
Very good
10,647 reviews
Check prices

Comfort

7.9

Overall

8.0

Food

7.4

Entertainment

8.0

Boarding

8.2

Crew

8.6

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

KLM
7.9
Good
1,561 reviews
Delta
8.0
Very good
10,647 reviews
Check prices

Comfort

7.9

Overall

8.0

Food

7.4

Entertainment

8.0

Boarding

8.2

Crew

8.6

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

SWISS
7.8
Good
1,984 reviews
Delta
8.0
Very good
10,647 reviews
Check prices

Comfort

7.9

Overall

8.0

Food

7.4

Entertainment

8.0

Boarding

8.2

Crew

8.6

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Finnair
7.8
Good
1,374 reviews
Delta
8.0
Very good
10,647 reviews
Check prices

Comfort

7.9

Overall

8.0

Food

7.4

Entertainment

8.0

Boarding

8.2

Crew

8.6

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Virgin Atlantic
7.7
Good
733 reviews
Delta
8.0
Very good
10,647 reviews
Check prices

Comfort

7.9

Overall

8.0

Food

7.4

Entertainment

8.0

Boarding

8.2

Crew

8.6

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Heathrow. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Seattle to London Heathrow?

    Seattle/Tacoma Intl (SEA) is the airport you will fly out of if you book a flight from Seattle to London Heathrow. You should not have trouble finding flights to London Heathrow from Seattle/Tacoma Intl; the airport handles an average of 19 outbound flights to London Heathrow per day. You should also have plenty of airline options to choose from since 16 airlines have flights from the Seattle airport to London Heathrow. It is only a 11.4 mi journey to Seattle/Tacoma Intl (SEA) from Seattle’s city center.

  • Can I find flights from Seattle to London Heathrow Airport for under $600 on Cheapflights?

    Yes, there are multiple flights from Seattle to London Heathrow Airport for under $600. The cheapest flight booked recently is on Lufthansa for just $584, but on average you can expect to pay $606.

  • Are there nonstop flights from Seattle to London Heathrow Airport for under $700 on Cheapflights?

    Cheapflights has at least 20 direct flights from Seattle to London Heathrow Airport under $700. A good price for a nonstop flight from Seattle to London Heathrow Airport is less than $730.

  • Are there last-minute flights available from Seattle to London Heathrow Airport for under $1,000?

    There are currently 20+ open flights from Seattle to London Heathrow Airport within the next 7 days for less than $1,000.

  • What are the cheapest airlines flying from Seattle to London Heathrow Airport round-trip?

    Our cheapest airline available from Seattle to London Heathrow Airport is Lufthansa. Our recent data shows that you can find tickets from as low as $584 on this airline. Additional options worth looking into are Icelandair and United Airlines, starting at $586 and $607 round-trip. Lufthansa is currently priced 33% below the average price you’ll pay for this route.

  • What are the most popular airlines that fly from Seattle to London Heathrow Airport?

    Before booking your flight from Seattle to London Heathrow Airport check out the most popular airlines for this route: American Airlines, Air Canada or Air France.

  • What are the most reliable airlines from Seattle to London Heathrow Airport?

    No one likes to see their flight delayed. When booking a flight from Seattle to London Heathrow Airport consider choosing American Airlines (71%), Aer Lingus (71%) or Finnair (71%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Seattle to London Heathrow Airport?

    Looking for the cheapest flight from Seattle to London Heathrow Airport? While on average our users pay $3,063, our data indicates the cheapest price to be $487. The most popular route (Seattle/Tacoma Intl - London Heathrow), is priced around $582.

  • What does SEA to LHR mean?

    SEA stands for Seattle/Tacoma Intl Airport, while LHR stands for London Heathrow Airport. These codes are often called IATA codes, a set of identifiers established by IATA (International Air Transport Association) that is widely used by airlines and the aviation industry.

  • Can I find deals for flights from Seattle to Heathrow that include extra baggage allowance?

    The amount of baggage you can bring on your Seattle to Heathrow flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from Seattle to Heathrow with specific airlines?

    Yes, Cheapflights allows you to browse and filter Seattle to Heathrow flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • Can I find deals for flights from Seattle to Heathrow that include hotel bookings?

    Yes. In addition to deals on Seattle to Heathrow flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Heathrow?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Heathrow.

  • Can I find deals for business class flights from Seattle to Heathrow?

    Yes. Cheapflights offers flight deals from Seattle to Heathrow by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • Can I find deals for flights from Seattle to Heathrow that allow pets onboard?

    Many airlines flying from Seattle to Heathrow offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from Seattle to Heathrow?

    Yes, you can often find last-minute deals on Seattle to Heathrow flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the Seattle to London Heathrow Airport flight deals updated?

    The Seattle to London Heathrow Airport flight deals you see on this page were last updated on 5/18.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Seattle to Heathrow
See prices for flight routes from nearby airports that may be better suited for you.

Seattle to Gatwick flights
Seattle to London City flights
Portland to Heathrow flights
Seattle to Luton flights
Portland to Gatwick flights
Portland to London City flights
Portland to Luton flights
Spokane to Heathrow flights
Spokane to Gatwick flights
Seattle to Stansted flights
Portland to Stansted flights
Spokane to London City flights
Pasco to Heathrow flights
Seattle to Southend flights
Bellingham to Heathrow flights
Portland to Southend flights
Bellingham to Gatwick flights
Walla Walla to Heathrow flights

Top 10 airlines flying from Seattle to Heathrow

Discover the top 10 airlines that operate flights from Seattle to Heathrow. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,634,509 searches. Data last updated May 19, 2024.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$402Average$702FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
IcelandairCheapest$519Average$703FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Aer LingusCheapest$557Average$845FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
FinnairCheapest$572Average$943FlexibilityNo cancel feeOn-time76%
Search Finnair flights
United AirlinesCheapest$575Average$921FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
IberiaCheapest$582Average$836FlexibilityNo cancel feeOn-time77%
Search Iberia flights
Air FranceCheapest$588Average$877FlexibilityNo cancel feeOn-time77%
Search Air France flights
American AirlinesCheapest$598Average$964FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Air CanadaCheapest$604Average$902FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
British AirwaysCheapest$625Average$955FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Dallas to El Paso flights
Tampa to Miami flights
USA to Maldives flights
New York to Los Angeles flights
Dallas to San Francisco flights
Austin to Dallas flights
Nashville to Dallas flights
Charlotte to Cancún flights
USA to Amsterdam flights
Minneapolis to Chicago flights
Dallas to Nashville flights
Seattle to Lanzhou flights

Search flights from Seattle to Heathrow by cabin class

Find flights from Seattle to Heathrow, based on your preferred cabin class, be it economy, premium economy, business, or first class.
First Class
Business Class
Prem Econ Class
Economy Class

Hourly flight availability from Seattle to Heathrow

Find hourly flight availability from Seattle to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated May 19, 2024.
1%of flight departuresEarly morningMidnight to 6 am
0%of flight departuresMorning6 am to noon
48%of flight departuresAfternoonNoon to 6 pm
51%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM

Weekly flight availability from Seattle to Heathrow

Explore weekly flight availability from Seattle to Heathrow. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated May 19, 2024.
Sunday20daily flights
Monday20daily flights
Tuesday15daily flights
Wednesday20daily flights
Thursday20daily flights
Friday20daily flights
Saturday20daily flights

Book a flight to one of these trending destinations

User searches for flights to these destinations increased 20% or more in the past 90 days compared to other destinations
Flights to Montes Claros
Flights to Girona Costa Brava
Flights to Naxos
Flights to Bourgas
Flights to Hyannis Barnstable
Flights to Samos
Flights to Reggio Calabria Tito Menniti
Flights to Devils Lake
Flights to Ningbo Lishe Intl
Flights to Pellston Emmet County
Flights to Provincetown
Flights to Cortez Montezuma County
Flights to Ohrid
Flights to Oran Es Senia
Flights to Menorca/Mahon
Flights to Hakodate
Flights to Ordu/Giresun
Flights to Laayoune Hassan I
Flights to Cornwall Newquay
Flights to Melilla
Flights to Rennes St Jacques
Flights to Parikia Paros
Flights to Constanţa Mihail Kogalniceanu
Flights to Miyakojima Hirara

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Seattle to Heathrow?

Cheapflights makes it easy to find Seattle to Heathrow flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Seattle to Heathrow?

Cheapflights helps you find that perfect flight to Heathrow from Seattle by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Seattle to Heathrow with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Seattle to Heathrow flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Seattle to Heathrow become cheaper?

Of course! You can now track prices for flights from Seattle to Heathrow and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
View all available airlines