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Cheap flights from Portland to St. Louis (PWM - STL) from $143

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 10/30. 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.
PWM — STL
Jun 14 — Jun 211
From?
To?
Fri 6/14
Fri 6/21
1 adult, Economy
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The best prices from Portland to Lambert-St Louis are usually found in January or November, booked 47 days in advance, depart on a Wednesday or Thursday and return on a Wednesday

Cheap flight deals from Portland to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Portland (PWM) to St. Louis (STL). 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 9, 2024.

Popular in

April

Cheapest in

January

Round-trip from

$318

One-way from

$233
High demand for flights, 23% potential price rise
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Best time to find cheap flights, 16% potential price drop
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From Portland to Lambert-St Louis
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One-way flight from Portland to Lambert-St Louis
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What is the cheapest day to fly round-trip from Portland, Maine to St. Louis?

Departing on a Tuesday is a good option for securing a great price. You can expect to save up to 48% when planning your travel around this day of the week.

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

To save up to 164% on this flight, we recommend booking at least 48 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Portland, Maine to St. Louis from $639 1-2 weeks out and tickets from $639 for flights departing within the next 72 hours.

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

Due to multiple factors, expect to potentially pay more when booking in April. For low rates, January can be a great choice for travel to St. Louis. Flights to St. Louis from Portland, Maine in January are about $520 on average during January, but can be found for as low as $254.

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

When flying from Portland, Maine to St. Louis, the time of day you fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 20% versus a flight in the afternoon.

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

Find cheap flight options from Portland to St. Louis specifically for the months of June and July 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 3,020,828 searches. Prices were last updated on June 9, 2024.
Check out some of the best flight deals from Portland to St. Louis in 2024. More deals are always being added, so be sure to check back regularly.
Sat 6/2212:10 pmPWM - STL
1 stop8h 51mSun Country Air
Sun 6/305:45 pmSTL - PWM
1 stop17h 26mSun Country Air
Deal found 6/9$335
Tue 6/253:46 pmPWM - STL
1 stop6h 08mDelta
Tue 7/26:30 amSTL - PWM
1 stop4h 46mDelta
Deal found 6/9$349
Tue 7/306:02 amPWM - STL
1 stop6h 40mDelta
Thu 8/13:49 pmSTL - PWM
1 stop5h 11mDelta
Deal found 6/9$352
Tue 7/305:26 pmPWM - STL
1 stop5h 03mAmerican Airlines
Thu 8/15:46 pmSTL - PWM
1 stop5h 00mAmerican Airlines
Deal found 6/8$376
Sun 6/231:57 pmPWM - STL
1 stop28h 17mFrontier
Mon 7/17:29 pmSTL - PWM
1 stop12h 37mFrontier
Deal found 6/9$388
Wed 6/196:01 amPWM - STL
1 stop15h 53mDelta
Tue 7/26:30 amSTL - PWM
1 stop4h 46mDelta
Deal found 6/9$405
Fri 7/123:50 pmPWM - STL
1 stop7h 41mUnited Airlines
Sun 7/146:08 amSTL - PWM
1 stop6h 43mUnited Airlines
Deal found 6/8$407
Tue 6/253:46 pmPWM - STL
1 stop6h 08mDelta
Mon 7/14:02 pmSTL - PWM
1 stop4h 58mDelta
Deal found 6/9$416
Fri 7/125:54 pmPWM - STL
3 stops24h 35mMultiple Airlines
Sun 7/146:19 pmSTL - PWM
2 stops13h 50mMultiple Airlines
Deal found 6/8$432

Portland to St. Louis 2024 flight deals

Discover exclusive flight deals for travel between Portland and St. Louis in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 3,020,828 searches. Data last updated June 9, 2024.
Check out some of the best flight deals from Portland to St. Louis in 2024. More deals are always being added, so be sure to check back regularly.
Sat 6/2212:10 pmPWM - STL
1 stop8h 51mSun Country Air
Sun 6/305:45 pmSTL - PWM
1 stop17h 26mSun Country Air
Deal found 6/9$335
Tue 6/253:46 pmPWM - STL
1 stop6h 08mDelta
Tue 7/26:30 amSTL - PWM
1 stop4h 46mDelta
Deal found 6/9$349
Tue 7/306:02 amPWM - STL
1 stop6h 40mDelta
Thu 8/13:49 pmSTL - PWM
1 stop5h 11mDelta
Deal found 6/9$352
Tue 7/305:26 pmPWM - STL
1 stop5h 03mAmerican Airlines
Thu 8/15:46 pmSTL - PWM
1 stop5h 00mAmerican Airlines
Deal found 6/8$376
Sun 6/231:57 pmPWM - STL
1 stop28h 17mFrontier
Mon 7/17:29 pmSTL - PWM
1 stop12h 37mFrontier
Deal found 6/9$388
Wed 6/196:01 amPWM - STL
1 stop15h 53mDelta
Tue 7/26:30 amSTL - PWM
1 stop4h 46mDelta
Deal found 6/9$405
Fri 7/123:50 pmPWM - STL
1 stop7h 41mUnited Airlines
Sun 7/146:08 amSTL - PWM
1 stop6h 43mUnited Airlines
Deal found 6/8$407
Tue 6/253:46 pmPWM - STL
1 stop6h 08mDelta
Mon 7/14:02 pmSTL - PWM
1 stop4h 58mDelta
Deal found 6/9$416
Fri 7/125:54 pmPWM - STL
3 stops24h 35mMultiple Airlines
Sun 7/146:19 pmSTL - PWM
2 stops13h 50mMultiple Airlines
Deal found 6/8$432

Portland to St. Louis flights leaving soon

Find last-minute flight options from Portland to St. Louis 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 3,020,828 searches. Data last updated June 9, 2024.
Consider one of these great deals we found on last-minute flights from Portland to St. Louis. Tip: verify your flight details before completing your reservation.
Sat 6/2212:10 pmPWM - STL
1 stop8h 51mSun Country Air
Sun 6/305:45 pmSTL - PWM
1 stop17h 26mSun Country Air
Deal found 6/9$335
Sun 6/231:57 pmPWM - STL
1 stop28h 17mFrontier
Mon 7/17:29 pmSTL - PWM
1 stop12h 37mFrontier
Deal found 6/9$388
Wed 6/196:01 amPWM - STL
1 stop15h 53mDelta
Tue 7/26:30 amSTL - PWM
1 stop4h 46mDelta
Deal found 6/9$405
Sat 6/227:00 amPWM - STL
1 stop11h 20mDelta
Tue 7/26:30 amSTL - PWM
1 stop4h 46mDelta
Deal found 6/9$435
Fri 6/215:26 pmPWM - STL
1 stop17h 33mDelta
Tue 7/26:30 amSTL - PWM
1 stop4h 46mDelta
Deal found 6/9$445
Sat 6/2212:10 pmPWM - STL
1 stop8h 51mMultiple Airlines
Sun 6/3012:15 pmSTL - PWM
3 stops22h 56mMultiple Airlines
Deal found 6/9$446
Wed 6/196:01 amPWM - STL
1 stop15h 53mDelta
Mon 7/14:02 pmSTL - PWM
1 stop4h 58mDelta
Deal found 6/9$472
Sat 6/221:30 pmPWM - STL
3 stops28h 02mMultiple Airlines
Sun 6/3012:15 pmSTL - PWM
3 stops22h 56mMultiple Airlines
Deal found 6/9$479
Tue 6/186:01 amPWM - STL
1 stop9h 29mDelta
Mon 6/246:00 amSTL - PWM
1 stop6h 28mDelta
Deal found 6/9$482

One-way flights to St. Louis from Portland

Search for one-way flight options from Portland to St. Louis. 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 3,020,828 searches. Data last updated June 9, 2024.
Take a look at some of the best available options we've come across on one-way flights from Portland to St. Louis. Those seeking round-trip flights from Portland to St. Louis should utilize the search form at the the top of the page.
Wed 10/305:30 amPWM - STL
1 stop5h 01mDelta
Deal found 6/9$143
Sun 9/227:29 amPWM - STL
1 stop5h 29mAmerican Airlines
Deal found 6/8$173
Wed 10/309:30 amPWM - STL
1 stop7h 13mUnited Airlines
Deal found 6/9$183
Sun 7/77:37 pmPWM - STL
1 stop14h 06mFrontier
Deal found 6/8$193
Sat 7/65:37 amPWM - STL
1 stop4h 38mDelta
Deal found 6/8$233
Sun 7/77:37 pmPWM - STL
1 stop14h 06mFrontier
Deal found 6/9$240
Wed 10/305:30 amPWM - STL
2 stops11h 13mUnited Airlines
Deal found 6/9$248
Sat 7/65:30 amPWM - STL
2 stops17h 18mUnited Airlines
Deal found 6/8$333
Sun 9/224:50 pmPWM - STL
2 stops18h 16mAmerican Airlines
Deal found 6/8$388

Find flights from Portland to St. Louis within your budget

Customize your flight search to find flights from Portland to St. Louis 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 3,020,828 searches. Data last updated June 9, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$335 - $446

Route

Depart

Return

Price

PortlandLambert-St Louis

PWM - STL

PWMSTL

Portland

Sat 6/22

1 stop8h 51m

Lambert-St Louis

Sun 6/30

1 stop17h 26m

$335

PortlandLambert-St Louis

PWM - STL

PWMSTL

Portland

Tue 6/25

1 stop6h 08m

Lambert-St Louis

Tue 7/2

1 stop4h 46m

$349

PortlandLambert-St Louis

PWM - STL

PWMSTL

Portland

Tue 7/30

1 stop6h 40m

Lambert-St Louis

Thu 8/1

1 stop5h 11m

$352

PortlandLambert-St Louis

PWM - STL

PWMSTL

Portland

Tue 7/30

1 stop5h 03m

Lambert-St Louis

Thu 8/1

1 stop5h 00m

$376

PortlandLambert-St Louis

PWM - STL

PWMSTL

Portland

Sun 6/23

1 stop28h 17m

Lambert-St Louis

Mon 7/1

1 stop12h 37m

$388

PortlandLambert-St Louis

PWM - STL

PWMSTL

Portland

Wed 6/19

1 stop15h 53m

Lambert-St Louis

Tue 7/2

1 stop4h 46m

$405

PortlandLambert-St Louis

PWM - STL

PWMSTL

Portland

Fri 7/12

1 stop7h 41m

Lambert-St Louis

Sun 7/14

1 stop6h 43m

$407

PortlandLambert-St Louis

PWM - STL

PWMSTL

Portland

Fri 7/12

3 stops24h 35m

Lambert-St Louis

Sun 7/14

2 stops13h 50m

$432

PortlandLambert-St Louis

PWM - STL

PWMSTL

Portland

Sat 6/22

1 stop8h 51m

Lambert-St Louis

Sun 6/30

3 stops22h 56m

$446

Flights are sorted by cheapest first

Deals found on 6/9

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

Use this chart to determine the optimal time to book a round-trip flight from Portland to St. Louis. Price data was last updated on May 31, 2024.
The price you pay for your flight from Portland, Maine to St. Louis may vary depending on when you book. For the best chance of a lower fare, look to book 47 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 Portland, Maine to St. Louis?

Use this chart to determine the cheapest time to fly round-trip from Portland to St. Louis. Price data was last updated on June 9, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Portland, Maine to St. Louis flight should consider departing on Wednesday afternoons 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 Portland to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Portland 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 St. Louis by month

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

STL

Temperature

32 - 80.6 °F

If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. 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 St. Louis. Reviews last updated June 9, 2024.
Peruse reviews from past customers who have flown with Delta, American Airlines and Frontier from Portland to St. Louis 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
10,310 reviews

Overall

8.0

Boarding

8.2

Entertainment

8.0

Food

7.4

Comfort

7.9

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
10,310 reviews
Delta
8.0
Very good
10,310 reviews

Overall

8.0

Boarding

8.2

Entertainment

8.0

Food

7.4

Comfort

7.9

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
10,661 reviews
Delta
8.0
Very good
10,310 reviews

Overall

8.0

Boarding

8.2

Entertainment

8.0

Food

7.4

Comfort

7.9

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
14,172 reviews
Delta
8.0
Very good
10,310 reviews

Overall

8.0

Boarding

8.2

Entertainment

8.0

Food

7.4

Comfort

7.9

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.

Sun Country Air
7.2
Good
588 reviews
Delta
8.0
Very good
10,310 reviews

Overall

8.0

Boarding

8.2

Entertainment

8.0

Food

7.4

Comfort

7.9

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
3,975 reviews
Delta
8.0
Very good
10,310 reviews

Overall

8.0

Boarding

8.2

Entertainment

8.0

Food

7.4

Comfort

7.9

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 Portland to St. Louis. 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 Portland, Maine to St. Louis for under $400 on Cheapflights?

    Yes, there are multiple flights from Portland, Maine to St. Louis for under $400. The cheapest flight booked recently is on Sun Country Air for just $335, but on average you can expect to pay $438.

  • Are there last-minute flights available from Portland, Maine to St. Louis for under $400?

    There are currently 20+ open flights from Portland, Maine to St. Louis within the next 7 days for less than $400.

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

    Flying on Sun Country Air is currently your cheapest option to St. Louis, with prices starting at $335. Additional round-trip tickets that might be worth considering are offered by Delta and American Airlines, with the lowest prices starting at $349 and $376, respectively. Sun Country Air is 35% cheaper than the average price of flights available within the next 90 days to this destination.

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

    For one-way options, check prices for Delta. According to our data, you can fly for as low as $143. Users have also found prices from $173 and $183 on American Airlines and United Airlines, respectively.

  • What does PWM to STL mean?

    PWM stands for Portland Airport, while STL stands for Lambert-St Louis 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 Portland to St. Louis that include extra baggage allowance?

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

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

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

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

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

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

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

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

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

    The Portland, Maine to St. Louis flight deals you see on this page were last updated on 6/9.

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

    When booking a flight from Portland, Maine to St. Louis, you may want to consider flying on American Airlines, JetBlue or Delta as they are the most popular for this route.

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

    Currently, September is the cheapest month in which you can book a flight from Portland, Maine to St. Louis (average of $318). Flying from Portland, Maine to St. Louis in July is currently the most expensive (average of $365). 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 Portland to St. Louis
See prices for flight routes from nearby airports that may be better suited for you.

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Top 4 airlines flying from Portland to St. Louis

Discover the top 4 airlines that operate flights from Portland to St. Louis. 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 3,020,828 searches. Data last updated June 9, 2024.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$338Average$540FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$346Average$482FlexibilityNo cancel feeOn-time71%
DeltaCheapest$346Average$470FlexibilityNo cancel feeOn-timeN/A
JetBlueCheapest$412Average$484FlexibilityNo cancel feeOn-time62%
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Search flights from Portland to St. Louis by cabin class

Find flights from Portland to St. Louis, based on your preferred cabin class, be it economy, premium economy, business, or first class.
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