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St. Louis

$149+ Cheap flights from Maine to St. Louis (STL)

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 9/4. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — STL
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
1 adult, Economy
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Cheap flight deals from Maine to St. Louis

Keep the following information in mind while searching for Maine to St. Louis flight deals. Data was last updated July 31, 2025.

Round-trip from

$242
(CheapOair)

One-way from

$149
(American Airlines)

Popular in

December

Cheapest in

February

Average price

$432
From Maine to Lambert-St Louis
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One-way flight from Maine to Lambert-St Louis
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Highest demand for flights based on searches. 8% potential increase in price ($38 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($14 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find flight deals from Maine to St. Louis

Cheapest flights from Maine to St. Louis
Explore the most affordable flight options available from Maine to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 31, 2025.

This CheapOair deal was found by Cheapflights users on 7/29. 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 8/156:30 amBOS - STL
1 stop8h 02mMultiple Airlines
Sun 8/242:02 pmSTL - BOS
1 stop19h 21mMultiple Airlines
Deal found 7/29$242
This FlightHub deal was found by Cheapflights users on 7/30. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/159:40 amBOS - STL
1 stop15h 07mFrontier
Sun 8/175:40 pmSTL - BOS
1 stop13h 55mFrontier
Deal found 7/30$245
This CheapOair deal was found by Cheapflights users on 7/30. 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.
Thu 8/146:30 amBOS - STL
1 stop8h 02mSpirit Airlines
Sun 8/172:30 pmSTL - BOS
1 stop7h 04mSpirit Airlines
Deal found 7/30$246
This American Airlines deal was found by Cheapflights users on 7/30. 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.
Sat 8/235:28 amBOS - STL
1 stop8h 44mAmerican Airlines
Wed 8/276:55 pmSTL - BOS
Nonstop2h 41mAmerican Airlines
Deal found 7/30$247
This Delta deal was found by Cheapflights users on 7/30. 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.
Sat 12/66:00 amBGR - STL
1 stop6h 25mDelta
Tue 12/912:00 pmSTL - BGR
1 stop5h 20mDelta
Deal found 7/30$259
This Delta deal was found by Cheapflights users on 7/29. 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.
Thu 8/288:30 amBOS - STL
1 stop7h 07mDelta
Sat 8/305:25 pmSTL - BOS
1 stop4h 56mDelta
Deal found 7/29$260
This Southwest deal was found by Cheapflights users on 7/31. 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.
Sat 8/235:35 amBOS - STL
Nonstop2h 55mSouthwest
Tue 8/266:40 pmSTL - BOS
Nonstop2h 35mSouthwest
Deal found 7/31$277
This American Airlines deal was found by Cheapflights users on 7/30. 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.
Thu 8/146:00 amBGR - STL
1 stop7h 35mAmerican Airlines
Mon 8/188:43 amSTL - BGR
1 stop5h 01mAmerican Airlines
Deal found 7/30$289
This United Airlines deal was found by Cheapflights users on 7/30. 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.
Wed 9/244:56 pmPWM - STL
1 stop6h 39mUnited Airlines
Sat 9/273:23 pmSTL - PWM
1 stop5h 21mUnited Airlines
Deal found 7/30$297
This United Airlines deal was found by Cheapflights users on 7/29. 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.
Tue 10/146:15 pmBOS - STL
1 stop5h 20mUnited Airlines
Thu 10/1612:25 pmSTL - BOS
1 stop6h 06mUnited Airlines
Deal found 7/29$306
This Delta deal was found by Cheapflights users on 7/30. 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 9/246:00 amPWM - STL
2 stops11h 05mDelta
Sat 9/2710:40 amSTL - PWM
2 stops10h 20mDelta
Deal found 7/30$307
This Mytrip deal was found by Cheapflights users on 7/28. 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.
Sat 8/96:58 pmPWM - STL
1 stop29h 49mFrontier
Fri 8/155:40 pmSTL - PWM
1 stop23h 33mFrontier
Deal found 7/28$337

Cheapflights Fare Finder

 
Customize your flight search to find flights from Maine 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 2,558,603 searches. Data last updated July 31, 2025.
Use the filters below to find and compare flights from Maine to St. Louis that are best for you.

Fly from

Maine

Fly to

St. Louis

Route

Depart

Return

Price

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Fri 8/15

6:30 am-1:32 pm

1 stop8h 02m

Lambert-St Louis

Sun 8/17

5:40 pm-8:35 am

1 stop13h 55m

$242

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Fri 8/15

9:40 am-11:47 pm

1 stop15h 07m

Lambert-St Louis

Sun 8/17

5:40 pm-8:35 am

1 stop13h 55m

$245

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Thu 8/14

6:30 am-1:32 pm

1 stop8h 02m

Lambert-St Louis

Sun 8/17

2:30 pm-10:34 pm

1 stop7h 04m

$246

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Sat 8/23

5:28 am-1:12 pm

1 stop8h 44m

Lambert-St Louis

Wed 8/27

6:55 pm-10:36 pm

Nonstop2h 41m

$247

BangorSt. Louis

BGR - STL

BGRSTL

Bangor

Sat 12/6

6:00 am-11:25 am

1 stop6h 25m

Lambert-St Louis

Tue 12/9

12:00 pm-6:20 pm

1 stop5h 20m

$259

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Thu 8/28

8:30 am-2:37 pm

1 stop7h 07m

Lambert-St Louis

Sat 8/30

5:25 pm-11:21 pm

1 stop4h 56m

$260

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Sat 8/23

5:35 am-7:30 am

Nonstop2h 55m

Lambert-St Louis

Tue 8/26

6:40 pm-10:15 pm

Nonstop2h 35m

$277

BangorSt. Louis

BGR - STL

BGRSTL

Bangor

Thu 8/14

6:00 am-12:35 pm

1 stop7h 35m

Lambert-St Louis

Mon 8/18

8:43 am-2:44 pm

1 stop5h 01m

$289

PortlandSt. Louis

PWM - STL

PWMSTL

Portland

Wed 9/24

4:56 pm-10:35 pm

1 stop6h 39m

Lambert-St Louis

Sat 9/27

3:23 pm-9:44 pm

1 stop5h 21m

$297

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Tue 10/14

6:15 pm-10:35 pm

1 stop5h 20m

Lambert-St Louis

Thu 10/16

12:25 pm-7:31 pm

1 stop6h 06m

$306

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Showing 1-10 of 32 results
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Best time to book a flight from Maine to St. Louis

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

Cheapflights Insights

Everything you need to know about your flight from Maine to St. Louis

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

Currently, August is the cheapest month in which you can book a flight from Maine to St. Louis (average of $311). Flying from Maine to St. Louis in March is currently the most expensive (average of $356). 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 ME to STL?

Find hourly flight availability from Maine 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 July 31, 2025.

When flying from Maine to St. Louis, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

How much does it cost to fly round-trip from Maine to St. Louis?

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 July 31, 2025.
See what other customers who have flown with Southwest, Delta, and United Airlines from Maine to St. Louis have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,246 reviews

Overall

8.0

Boarding

8.1

Food

7.0

Entertainment

7.5

Comfort

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Southwest
8.0
Very good
4,246 reviews
Southwest
8.0
Very good
4,246 reviews

Overall

8.0

Boarding

8.1

Food

7.0

Entertainment

7.5

Comfort

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Delta
8.0
Very good
7,981 reviews
Southwest
8.0
Very good
4,246 reviews

Overall

8.0

Boarding

8.1

Food

7.0

Entertainment

7.5

Comfort

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
United Airlines
7.4
Good
8,900 reviews
Southwest
8.0
Very good
4,246 reviews

Overall

8.0

Boarding

8.1

Food

7.0

Entertainment

7.5

Comfort

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,246 reviews

Overall

8.0

Boarding

8.1

Food

7.0

Entertainment

7.5

Comfort

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Spirit Airlines
6.3
Okay
8,048 reviews
Southwest
8.0
Very good
4,246 reviews

Overall

8.0

Boarding

8.1

Food

7.0

Entertainment

7.5

Comfort

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.

Related info for your journey

Find useful and relevant information for your journey from Maine 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 airport do you fly into for flights to St. Louis from Maine?

    If you book a flight to St. Louis from Maine, you will be flying to Lambert-St Louis, which is the city’s only airport. Lambert-St Louis (STL) is located 12.7 mi from the center of St. Louis.

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

    One-way options have recently been found by users for as low as $149 on American Airlines. Other airlines that offer cheap prices include Spirit Airlines from $151 and Delta from $154 one-way.

  • What are the most popular routes from Maine to St. Louis?

    Most travelers choose Boston Logan Intl - Lambert-St Louis, Portland - Lambert-St Louis or Bangor - Lambert-St Louis when deciding on the best route from Maine to St. Louis.

  • Can I find deals for flights from Maine to St. Louis that include hotel bookings?

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

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

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

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

    Yes. Cheapflights offers flight deals from Maine 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 Maine to St. Louis?

    Currently, August is the cheapest month in which you can book a flight from Maine to St. Louis (average of $311). Flying from Maine to St. Louis in March is currently the most expensive (average of $356). 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

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
O'Fallon
Maryland Heights
Fairview Heights
Collinsville
Eureka
St. Peters
Glencoe
Alton
Chesterfield
Festus
Farmington

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Alternative routes for Maine 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 Maine to St. Louis

Discover the top 4 airlines that operate flights from Maine 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 2,558,603 searches. Data last updated July 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$236Average$370FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$258Average$411FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$341Average$466FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$351Average$417FlexibilityNo cancel feeOn-time63%

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