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$213+ Cheap flights from Portland to St. Louis (PWM - STL)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/5. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — STL
Nov 25 — Dec 21
Mon 11/25
Mon 12/2
1 adult, Economy
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The best prices from Portland to Lambert-St Louis are usually found in January or September, booked 59 days in advance, depart on a Friday or Wednesday and return on a Tuesday

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 November 20, 2024.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Popular in

April

Cheapest in

January

Average price

$422

Round-trip from

$213
(CheapOair)
Provider with most accurate pricing for Portland-Lambert-St Louis flight deals.
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Provider most trusted by Cheapflights users for Portland-Lambert-St Louis flights.
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High demand for flights, 26% potential price rise
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Best time to find cheap flights, 18% potential price drop
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Average for round-trip flights in November 2024
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From Portland to Lambert-St Louis
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Find flight deals from Portland to St. Louis

Cheapest flights from Portland to St. Louis
Explore the most affordable flight options available from Portland to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 20, 2024.

This CheapOair deal was found by Cheapflights users on 11/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/139:13 pmPWM - STL
1 stop26h 33mFrontier
Sun 12/155:02 pmSTL - PWM
1 stop26h 12mFrontier
Deal found 11/20$258
This Delta deal was found by Cheapflights users on 11/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/186:10 amPWM - STL
1 stop6h 55mDelta
Wed 12/255:17 pmSTL - PWM
1 stop5h 53mDelta
Deal found 11/19$321
This Southwest deal was found by Cheapflights users on 11/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/1311:40 amPWM - STL
2 stops8h 25mSouthwest
Sun 12/155:20 pmSTL - PWM
1 stop5h 35mSouthwest
Deal found 11/20$421
This Mytrip deal was found by Cheapflights users on 11/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/135:56 pmPWM - STL
2 stops22h 25mMultiple Airlines
Sun 12/154:26 pmSTL - PWM
2 stops17h 55mMultiple Airlines
Deal found 11/20$436
This American Airlines deal was found by Cheapflights users on 11/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/205:39 amPWM - STL
1 stop17h 14mAmerican Airlines
Sun 12/225:58 pmSTL - PWM
1 stop5h 39mAmerican Airlines
Deal found 11/20$564
This United Airlines deal was found by Cheapflights users on 11/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/205:20 amPWM - STL
2 stops13h 31mUnited Airlines
Sun 12/225:00 amSTL - PWM
2 stops17h 59mUnited Airlines
Deal found 11/20$769

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 2,629,791 searches. Data last updated November 20, 2024.

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Depart

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PortlandSt. Louis

PWM - STL

PWMSTL

Portland

Sun 1/5

7:51 pm-11:40 pm

1 stop28h 49m

Lambert-St Louis

Sat 1/11

5:05 pm-6:08 pm

1 stop24h 03m

$213

PortlandSt. Louis

PWM - STL

PWMSTL

Portland

Wed 2/12

7:10 am-12:45 pm

1 stop6h 35m

Lambert-St Louis

Tue 2/25

2:10 pm-10:42 pm

1 stop7h 32m

$316

PortlandSt. Louis

PWM - STL

PWMSTL

Portland

Wed 12/18

6:10 am-12:05 pm

1 stop6h 55m

Lambert-St Louis

Wed 12/25

5:17 pm-12:10 am

1 stop5h 53m

$321

PortlandSt. Louis

PWM - STL

PWMSTL

Portland

Fri 12/13

11:40 am-7:05 pm

2 stops8h 25m

Lambert-St Louis

Sun 12/15

5:20 pm-11:55 pm

1 stop5h 35m

$421

PortlandSt. Louis

PWM - STL

PWMSTL

Portland

Fri 12/13

5:56 pm-3:21 pm

2 stops22h 25m

Lambert-St Louis

Sun 12/15

4:26 pm-11:21 am

2 stops17h 55m

$436

PortlandSt. Louis

PWM - STL

PWMSTL

Portland

Sat 2/15

7:15 pm-12:12 pm

2 stops17h 57m

Lambert-St Louis

Tue 2/25

5:36 pm-11:23 am

2 stops16h 47m

$511

PortlandSt. Louis

PWM - STL

PWMSTL

Portland

Tue 12/3

5:18 pm-9:17 pm

1 stop4h 59m

$368

PortlandSt. Louis

PWM - STL

PWMSTL

Portland

Tue 12/3

12:51 pm-11:41 pm

2 stops11h 50m

$373

PortlandSt. Louis

PWM - STL

PWMSTL

Portland

Tue 12/3

12:55 pm-12:10 pm

3 stops24h 15m

$394

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/20

Compare providers for flights from Portland to St. Louis

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Portland to St. Louis in November.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Portland, Maine-St. Louis flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Portland, Maine-St. Louis flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Portland, Maine-St. Louis flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Portland, Maine-St. Louis flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Portland, Maine-St. Louis flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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.

Travel insights for flights from Portland to St. Louis

Get recent, data-driven insights about flights from Portland to St. Louis including ideal travel times, pricing trends, and more.

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 November 15, 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 59 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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 $308). Flying from Portland, Maine to St. Louis in March is currently the most expensive (average of $357). 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.

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

Find hourly flight availability from Portland to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 20, 2024.

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 in the afternoon, which can drop the price by up to 31% versus a flight at noon.

Rainfall in St. Louis by month

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

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

Temperature in St. Louis by month

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

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 November 20, 2024.
Southwest
8.1
Very good
5,014 reviews

Entertainment

7.7

Food

7.2

Overall

8.1

Comfort

8.1

Crew

8.7

Boarding

8.2

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Southwest
8.1
Very good
5,014 reviews
Southwest
8.1
Very good
5,014 reviews

Entertainment

7.7

Food

7.2

Overall

8.1

Comfort

8.1

Crew

8.7

Boarding

8.2

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Delta
8.0
Very good
8,756 reviews
Southwest
8.1
Very good
5,014 reviews

Entertainment

7.7

Food

7.2

Overall

8.1

Comfort

8.1

Crew

8.7

Boarding

8.2

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

United Airlines
7.4
Good
9,171 reviews
Southwest
8.1
Very good
5,014 reviews

Entertainment

7.7

Food

7.2

Overall

8.1

Comfort

8.1

Crew

8.7

Boarding

8.2

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
5,014 reviews

Entertainment

7.7

Food

7.2

Overall

8.1

Comfort

8.1

Crew

8.7

Boarding

8.2

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Frontier
6.1
Okay
3,539 reviews
Southwest
8.1
Very good
5,014 reviews

Entertainment

7.7

Food

7.2

Overall

8.1

Comfort

8.1

Crew

8.7

Boarding

8.2

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

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.

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

    Flying on Frontier is currently your cheapest option to St. Louis, with prices starting at $213. Additional round-trip tickets that might be worth considering are offered by American Airlines and Delta, with the lowest prices starting at $316 and $321, respectively. Frontier is 56% cheaper than the average price of flights available within the next 90 days to this destination.

  • 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.

  • 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 $308). Flying from Portland, Maine to St. Louis in March is currently the most expensive (average of $357). 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

Browse thousands of different options on Cheapflights for your next trip

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Top 3 airlines flying from Portland to St. Louis

Discover the top 3 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 2,629,791 searches. Data last updated November 20, 2024.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$314Average$442FlexibilityNo cancel feeOn-time71%
DeltaCheapest$338Average$472FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$341Average$582FlexibilityNo cancel feeOn-time69%
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