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Cheap flights from St. Louis to Portland (STL - PWM) from $127

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 7/15. 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.
STL — PWM
Jun 7 — Jun 141
From?
To?
Fri 6/7
Fri 6/14
1 adult, Economy
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The best prices from Lambert-St Louis to Portland are usually found in January or February, booked 1 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday

Cheap flight deals from St. Louis to Portland

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Portland (PWM). 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 June 2, 2024.

Popular in

March

Cheapest in

January

Round-trip from

$293

One-way from

$136
High demand for flights, 23% potential price rise
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Best time to find cheap flights, 41% potential price drop
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From Lambert-St Louis to Portland
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One-way flight from Lambert-St Louis to Portland
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What is the cheapest day to fly round-trip from St. Louis to Portland, Maine?

Users have found that flying from St. Louis to Portland, Maine on a Saturday typically leans towards higher prices. However, this doesn’t mean you still can’t find a deal. Flexibility with other aspects of your flight can still land a great price for your trip.

What is the cheapest month to fly from St. Louis to Portland, Maine?

Due to multiple factors, expect to potentially pay more when booking in March. For low rates, January can be a great choice for travel to Portland, Maine. Flights to Portland, Maine from St. Louis in January are about $466 on average during January, but can be found for as low as $193.

What is the cheapest time of day to fly from STL to PWM?

When flying from St. Louis to Portland, Maine, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 43% versus a flight at noon.

Cheap American Airlines flights from St. Louis to Portland

Explore cheap flight options specifically provided by American Airlines for the route between St. Louis and Portland. 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 2,810,401 searches. Data last updated June 2, 2024.
Find some of the cheapest American Airlines flights traveling from St. Louis to Portland. Make sure to double check the flight details before booking.
Tue 10/155:37 amSTL - PWM
1 stop4h 47mAmerican Airlines
Tue 10/225:13 pmPWM - STL
1 stop4h 54mAmerican Airlines
Deal found 6/1$286
Mon 9/163:07 pmSTL - PWM
1 stop7h 03mAmerican Airlines
Mon 9/235:55 amPWM - STL
1 stop5h 11mAmerican Airlines
Deal found 6/1$306
Sat 9/143:52 pmSTL - PWM
1 stop6h 01mAmerican Airlines
Sun 9/1512:21 pmPWM - STL
1 stop6h 03mAmerican Airlines
Deal found 5/31$315
Tue 6/254:48 pmSTL - PWM
1 stop4h 47mAmerican Airlines
Fri 6/2811:07 amPWM - STL
1 stop5h 59mAmerican Airlines
Deal found 6/1$336
Wed 7/315:46 pmSTL - PWM
1 stop5h 00mAmerican Airlines
Sat 8/36:31 amPWM - STL
1 stop9h 52mAmerican Airlines
Deal found 6/1$337
Sun 9/156:22 pmSTL - PWM
1 stop4h 27mAmerican Airlines
Sun 9/2212:21 pmPWM - STL
1 stop6h 03mAmerican Airlines
Deal found 6/1$346
Sat 7/203:18 pmSTL - PWM
1 stop7h 28mAmerican Airlines
Sat 7/275:59 amPWM - STL
1 stop7h 43mAmerican Airlines
Deal found 5/31$365
Fri 8/25:46 pmSTL - PWM
1 stop5h 00mAmerican Airlines
Tue 8/65:30 pmPWM - STL
1 stop5h 47mAmerican Airlines
Deal found 6/1$376
Mon 7/16:08 amSTL - PWM
1 stop8h 25mAmerican Airlines
Mon 7/811:40 amPWM - STL
1 stop9h 40mAmerican Airlines
Deal found 6/1$388

Cheap United Airlines flights from St. Louis to Portland

Explore cheap flight options specifically provided by United Airlines for the route between St. Louis and Portland. 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 2,810,401 searches. Data last updated June 2, 2024.
To aid your search, here are some of the cheapest United Airlines flights we've found from St. Louis to Portland. Deals frequently update to provide users with more options.
Sat 6/158:05 amSTL - PWM
1 stop5h 16mUnited Airlines
Tue 6/186:00 amPWM - STL
1 stop7h 13mUnited Airlines
Deal found 6/1$426
Tue 10/156:02 amSTL - PWM
1 stop7h 29mUnited Airlines
Tue 10/227:27 pmPWM - STL
2 stops15h 40mUnited Airlines
Deal found 6/1$441
Tue 8/205:18 pmSTL - PWM
2 stops20h 25mUnited Airlines
Sun 8/2511:28 amPWM - STL
1 stop5h 37mUnited Airlines
Deal found 6/1$501
Mon 9/166:02 amSTL - PWM
1 stop6h 46mUnited Airlines
Mon 9/237:25 pmPWM - STL
2 stops15h 42mUnited Airlines
Deal found 6/1$519
Tue 8/1311:25 amSTL - PWM
2 stops11h 28mUnited Airlines
Sun 8/186:00 amPWM - STL
1 stop5h 23mUnited Airlines
Deal found 6/1$531
Tue 8/209:30 amSTL - PWM
2 stops13h 29mUnited Airlines
Sun 8/256:00 amPWM - STL
2 stops12h 11mUnited Airlines
Deal found 6/1$533
Sat 9/1411:10 amSTL - PWM
2 stops11h 49mUnited Airlines
Sun 9/156:00 amPWM - STL
1 stop5h 07mUnited Airlines
Deal found 5/31$538
Mon 9/165:20 pmSTL - PWM
2 stops16h 11mUnited Airlines
Mon 9/237:25 pmPWM - STL
2 stops15h 42mUnited Airlines
Deal found 6/1$548
Sat 7/133:43 pmSTL - PWM
1 stop4h 50mUnited Airlines
Sat 7/206:00 amPWM - STL
2 stops10h 40mUnited Airlines
Deal found 6/1$551

Cheap St. Louis to Portland flights in June & July 2024

Find cheap flight options from St. Louis to Portland specifically for the months of June and July 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,810,401 searches. Prices were last updated on June 2, 2024.
Check out some of the best flight deals from St. Louis to Portland in 2024. Check back regularly for other flight deals.
Tue 6/254:48 pmSTL - PWM
1 stop4h 47mAmerican Airlines
Fri 6/2811:07 amPWM - STL
1 stop5h 59mAmerican Airlines
Deal found 6/1$336
Fri 6/145:38 pmSTL - PWM
1 stop6h 14mAmerican Airlines
Tue 6/187:42 amPWM - STL
1 stop7h 34mAmerican Airlines
Deal found 5/31$423
Sat 6/158:05 amSTL - PWM
1 stop5h 16mUnited Airlines
Tue 6/186:00 amPWM - STL
1 stop7h 13mUnited Airlines
Deal found 6/1$426
Fri 6/2812:15 pmSTL - PWM
3 stops22h 00mMultiple Airlines
Mon 7/87:39 pmPWM - STL
2 stops19h 44mMultiple Airlines
Deal found 6/1$439
Fri 6/285:38 pmSTL - PWM
1 stop6h 14mAmerican Airlines
Mon 7/811:40 amPWM - STL
1 stop9h 40mAmerican Airlines
Deal found 6/1$456
Thu 6/208:12 pmSTL - PWM
1 stop11h 57mMultiple Airlines
Sun 6/231:20 pmPWM - STL
3 stops23h 25mMultiple Airlines
Deal found 6/1$458
Fri 6/283:07 pmSTL - PWM
2 stops19h 08mMultiple Airlines
Mon 7/87:39 pmPWM - STL
2 stops19h 44mMultiple Airlines
Deal found 6/1$487
Fri 6/2812:15 pmSTL - PWM
3 stops22h 00mMultiple Airlines
Mon 7/81:40 pmPWM - STL
3 stops23h 25mMultiple Airlines
Deal found 6/1$511
Thu 6/208:12 pmSTL - PWM
1 stop11h 57mMultiple Airlines
Sun 6/231:20 pmPWM - STL
2 stops25h 31mMultiple Airlines
Deal found 6/1$530

St. Louis to Portland 2024 flight deals

Discover exclusive flight deals for travel between St. Louis and Portland in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,810,401 searches. Data last updated June 2, 2024.
Check out some of the best flight deals from St. Louis to Portland in 2024. Check back regularly for other flight deals.
Sat 7/137:33 pmSTL - PWM
1 stop15h 24mFrontier
Tue 7/232:51 pmPWM - STL
1 stop18h 52mFrontier
Deal found 6/1$249
Tue 10/155:37 amSTL - PWM
1 stop4h 47mAmerican Airlines
Tue 10/225:13 pmPWM - STL
1 stop4h 54mAmerican Airlines
Deal found 6/1$286
Thu 8/13:49 pmSTL - PWM
1 stop5h 11mDelta
Tue 8/66:02 amPWM - STL
1 stop6h 40mDelta
Deal found 6/1$296
Mon 9/163:07 pmSTL - PWM
1 stop7h 03mAmerican Airlines
Mon 9/235:55 amPWM - STL
1 stop5h 11mAmerican Airlines
Deal found 6/1$306
Wed 7/313:49 pmSTL - PWM
1 stop5h 11mDelta
Tue 8/66:02 amPWM - STL
1 stop6h 40mDelta
Deal found 6/1$312
Sat 9/143:52 pmSTL - PWM
1 stop6h 01mAmerican Airlines
Sun 9/1512:21 pmPWM - STL
1 stop6h 03mAmerican Airlines
Deal found 5/31$315
Tue 8/133:00 pmSTL - PWM
1 stop6h 39mDelta
Sun 8/187:00 amPWM - STL
1 stop5h 42mDelta
Deal found 6/1$316
Tue 6/254:48 pmSTL - PWM
1 stop4h 47mAmerican Airlines
Fri 6/2811:07 amPWM - STL
1 stop5h 59mAmerican Airlines
Deal found 6/1$336
Wed 7/315:46 pmSTL - PWM
1 stop5h 00mAmerican Airlines
Sat 8/36:31 amPWM - STL
1 stop9h 52mAmerican Airlines
Deal found 6/1$337

One-way flights to Portland from St. Louis

Search for one-way flight options from St. Louis to Portland. 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 2,810,401 searches. Data last updated June 2, 2024.
Some of the best available deals we've found on one-way flights from St. Louis to Portland. Users can also find round-trip St. Louis to Portland flights by using the search form above.
Mon 7/157:33 pmSTL - PWM
1 stop12h 29mFrontier
Deal found 6/1$127
Mon 7/87:33 pmSTL - PWM
1 stop12h 29mFrontier
Deal found 6/1$135
Thu 7/410:30 amSTL - PWM
1 stop5h 16mDelta
Deal found 6/1$136
Mon 7/87:33 pmSTL - PWM
2 stops17h 18mFrontier
Deal found 6/1$145
Mon 9/306:00 amSTL - PWM
1 stop5h 03mAmerican Airlines
Deal found 6/1$153
Thu 6/68:12 pmSTL - PWM
1 stop12h 57mMultiple Airlines
Deal found 6/1$199
Thu 7/46:22 pmSTL - PWM
3 stops21h 51mMultiple Airlines
Deal found 6/1$214
Mon 9/306:30 amSTL - PWM
2 stops16h 29mUnited Airlines
Deal found 6/1$258
Thu 7/46:00 amSTL - PWM
2 stops15h 03mAmerican Airlines
Deal found 6/1$288

Find flights from St. Louis to Portland within your budget

Customize your flight search to find flights from St. Louis to Portland 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 2,810,401 searches. Data last updated June 2, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$249 - $439

Route

Depart

Return

Price

Lambert-St LouisPortland

STL - PWM

STLPWM

Lambert-St Louis

Sat 7/13

1 stop15h 24m

Portland

Tue 7/23

1 stop18h 52m

$249

Lambert-St LouisPortland

STL - PWM

STLPWM

Lambert-St Louis

Tue 10/15

1 stop4h 47m

Portland

Tue 10/22

1 stop4h 54m

$286

Lambert-St LouisPortland

STL - PWM

STLPWM

Lambert-St Louis

Thu 8/1

1 stop5h 11m

Portland

Tue 8/6

1 stop6h 40m

$296

Lambert-St LouisPortland

STL - PWM

STLPWM

Lambert-St Louis

Mon 9/16

1 stop7h 03m

Portland

Mon 9/23

1 stop5h 11m

$306

Lambert-St LouisPortland

STL - PWM

STLPWM

Lambert-St Louis

Wed 7/31

1 stop5h 11m

Portland

Tue 8/6

1 stop6h 40m

$312

Lambert-St LouisPortland

STL - PWM

STLPWM

Lambert-St Louis

Sat 9/14

1 stop6h 01m

Portland

Sun 9/15

1 stop6h 03m

$315

Lambert-St LouisPortland

STL - PWM

STLPWM

Lambert-St Louis

Tue 8/13

1 stop6h 39m

Portland

Sun 8/18

1 stop5h 42m

$316

Lambert-St LouisPortland

STL - PWM

STLPWM

Lambert-St Louis

Sat 6/15

1 stop5h 16m

Portland

Tue 6/18

1 stop7h 13m

$426

Lambert-St LouisPortland

STL - PWM

STLPWM

Lambert-St Louis

Fri 6/28

3 stops22h 00m

Portland

Mon 7/8

2 stops19h 44m

$439

Flights are sorted by cheapest first

Deals found on 6/1

How far ahead should I book a flight from St. Louis to Portland, Maine?

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Portland. Price data was last updated on May 31, 2024.
The price you pay for your flight from St. Louis to Portland, Maine may vary depending on when you book. For the best chance of a lower fare, look to book 1 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
Search Deals

What is the cheapest day to fly from St. Louis to Portland, Maine?

Use this chart to determine the cheapest time to fly round-trip from St. Louis to Portland. Price data was last updated on May 26, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their St. Louis to Portland, Maine flight should consider departing on Monday evenings when fares are most often at their lowest. Monday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
Search Deals

Best time to book a flight from St. Louis to Portland

Have a flexible travel schedule? Discover the best time to fly to Portland from St. Louis with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Temperature and rainfall in Portland by month

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

PWM

Temperature

23 - 68 °F

Reviews of airlines servicing Portland

Get insights into the airlines that provide service to Portland. 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 Portland. Reviews last updated June 2, 2024.
Read reviews from past customers who have flown American Airlines, United Airlines and Delta from St. Louis to Portland. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
10,410 reviews
Check prices

Food

7.4

Overall

8.0

Boarding

8.2

Comfort

7.9

Entertainment

8.0

Crew

8.6

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

Delta
8.0
Very good
10,410 reviews
Delta
8.0
Very good
10,410 reviews
Check prices

Food

7.4

Overall

8.0

Boarding

8.2

Comfort

7.9

Entertainment

8.0

Crew

8.6

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

United Airlines
7.4
Good
10,754 reviews
Delta
8.0
Very good
10,410 reviews
Check prices

Food

7.4

Overall

8.0

Boarding

8.2

Comfort

7.9

Entertainment

8.0

Crew

8.6

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

American Airlines
7.3
Good
14,268 reviews
Delta
8.0
Very good
10,410 reviews
Check prices

Food

7.4

Overall

8.0

Boarding

8.2

Comfort

7.9

Entertainment

8.0

Crew

8.6

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

Frontier
6.2
Okay
4,006 reviews
Delta
8.0
Very good
10,410 reviews
Check prices

Food

7.4

Overall

8.0

Boarding

8.2

Comfort

7.9

Entertainment

8.0

Crew

8.6

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

Related info for your journey

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

  • Can I find flights from St. Louis to Portland, Maine for under $300 on Cheapflights?

    Yes, there are multiple flights from St. Louis to Portland, Maine for under $300. The cheapest flight booked recently is on Frontier for just $249, but on average you can expect to pay $344.

  • What are the cheapest airlines flying from St. Louis to Portland, Maine round-trip?

    According to our current data, Frontier ($249), American Airlines ($286), and Delta ($296) offers the cheapest pricing from St. Louis to Portland, Maine. These flights start at 46% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from St. Louis to Portland, Maine one-way?

    $127 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on Delta and American Airlines, with prices starting from $136 and $153, respectively.

  • What does STL to PWM mean?

    Lambert-St Louis Airport is STL and Portland Airport is PWM. These codes are created by the International Air Transport Association (IATA) and airlines use them to identify the departing and arrival airports in the flight routes they service.

  • Can I find deals for flights from St. Louis to Portland that include extra baggage allowance?

    The amount of baggage you can bring on your St. Louis to Portland 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 St. Louis to Portland with specific airlines?

    Yes, Cheapflights allows you to browse and filter St. Louis to Portland 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 St. Louis to Portland that include hotel bookings?

    Yes. In addition to deals on St. Louis to Portland flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Portland?

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

  • Can I find deals for business class flights from St. Louis to Portland?

    Yes. Cheapflights offers flight deals from St. Louis to Portland 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 St. Louis to Portland that allow pets onboard?

    Many airlines flying from St. Louis to Portland 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 St. Louis to Portland?

    Yes, you can often find last-minute deals on St. Louis to Portland 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 St. Louis to Portland, Maine flight deals updated?

    The St. Louis to Portland, Maine flight deals you see on this page were last updated on 6/1.

  • What are the most popular airlines that fly from St. Louis to Portland, Maine?

    Before booking your flight from St. Louis to Portland, Maine check out the most popular airlines for this route: American Airlines, JetBlue or Delta.

  • What is the cheapest month to book a flight from St. Louis to Portland, Maine?

    Currently, January is the cheapest month in which you can book a flight from St. Louis to Portland, Maine (average of $293). Flying from St. Louis to Portland, Maine in April is currently the most expensive (average of $498). 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.

See more FAQs

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Alternative routes for St. Louis to Portland
See prices for flight routes from nearby airports that may be better suited for you.

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Top 5 airlines flying from St. Louis to Portland

Discover the top 5 airlines that operate flights from St. Louis to Portland. 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 2,810,401 searches. Data last updated June 2, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$174Average$285FlexibilityNo cancel feeOn-time62%
Search Frontier flights
United AirlinesCheapest$331Average$560FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
DeltaCheapest$335Average$480FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
American AirlinesCheapest$335Average$483FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
JetBlueCheapest$474Average$494FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
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Search flights from St. Louis to Portland by cabin class

Find flights from St. Louis to Portland, based on your preferred cabin class, be it economy, premium economy, business, or first class.
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Why should you use Cheapflights to find cheap flight tickets from St. Louis to Portland?

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Can Cheapflights find flights from St. Louis to Portland with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from St. Louis to Portland flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from St. Louis to Portland become cheaper?

Of course! You can now track prices for flights from St. Louis to Portland 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.

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