St. Louis

$86+ 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 4/28. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — STL
Apr 27 — May 41
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Cheap 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 March 28, 2026.

This Delta deal was found by Cheapflights users on 3/24. 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.
Tue 5/124:48 pm
PWM
-
STL
1 stop5h 21m
Delta
Wed 5/136:45 am
STL
-
PWM
1 stop4h 15m
Delta
Deal found 3/24$259
This Delta deal was found by Cheapflights users on 3/26. 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 5/76:02 am
PWM
-
STL
1 stop7h 21m
Delta
Wed 5/134:25 pm
STL
-
PWM
1 stop7h 18m
Delta
Deal found 3/26$285
This American Airlines deal was found by Cheapflights users on 3/23. 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 5/77:05 am
PWM
-
STL
1 stop5h 42m
American Airlines
Wed 5/135:21 pm
STL
-
PWM
1 stop5h 01m
American Airlines
Deal found 3/23$288
This Kiwi.com deal was found by Cheapflights users on 3/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/97:53 pm
BGR
-
STL
1 stop12h 58m
Multiple Airlines
Mon 4/134:59 pm
STL
-
BGR
1 stop17h 41m
Multiple Airlines
Deal found 3/27$289
This Delta deal was found by Cheapflights users on 3/24. 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.
Mon 5/114:48 pm
PWM
-
STL
1 stop5h 21m
Delta
Wed 5/134:25 pm
STL
-
PWM
1 stop7h 18m
Delta
Deal found 3/24$311
This American Airlines deal was found by Cheapflights users on 3/28. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/227:08 am
BGR
-
STL
1 stop6h 40m
American Airlines
Wed 4/292:33 pm
STL
-
BGR
1 stop7h 52m
American Airlines
Deal found 3/28$319
This Delta deal was found by Cheapflights users on 3/26. 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 4/225:15 am
BGR
-
STL
2 stops7h 41m
Delta
Wed 4/295:27 pm
STL
-
BGR
1 stop5h 04m
Delta
Deal found 3/26$324
This Delta deal was found by Cheapflights users on 3/25. 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 4/154:43 pm
PWM
-
STL
1 stop5h 01m
Delta
Mon 4/205:27 pm
STL
-
PWM
1 stop4h 57m
Delta
Deal found 3/25$329
This United Airlines deal was found by Cheapflights users on 3/24. 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.
Sat 5/164:50 pm
PWM
-
STL
1 stop5h 23m
United Airlines
Sat 5/231:13 pm
STL
-
PWM
1 stop7h 38m
United Airlines
Deal found 3/24$333
This United Airlines deal was found by Cheapflights users on 3/26. 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 5/294:51 pm
PWM
-
STL
1 stop5h 25m
United Airlines
Mon 6/11:13 pm
STL
-
PWM
1 stop7h 38m
United Airlines
Deal found 3/26$337
This Southwest deal was found by Cheapflights users on 3/26. 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.
Mon 6/15:30 am
PWM
-
STL
1 stop6h 20m
Southwest
Thu 6/42:25 pm
STL
-
PWM
2 stops8h 40m
Southwest
Deal found 3/26$338
This Delta deal was found by Cheapflights users on 3/27. 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 9/36:00 am
BGR
-
STL
1 stop6h 54m
Delta
Wed 9/91:30 pm
STL
-
BGR
2 stops8h 58m
Delta
Deal found 3/27$339

Find 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 March 28, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$259
(Delta)

One-way from

$86
(Frontier)

Popular in

November

Cheapest in

September

Average price

$344
Provider with most accurate pricing for Portland-Lambert-St Louis flight deals.
Provider most trusted by Cheapflights users for Portland-Lambert-St Louis flights.
From Maine to Lambert-St Louis
One-way flight from Maine to Lambert-St Louis
High demand for flights, 2% potential price rise
Cheapest flight prices on average. 2% potential price decrease ($12 potential savings vs. average RT price).
Average for round-trip flights in March 2026

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 March 28, 2026.
Use the filters below to find and compare flights from Maine to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortlandSt. Louis

PWM - STL

PWMSTL

Portland

Thu 5/7

7:05 am-11:47 am

1 stop5h 42m

Lambert-St Louis

Wed 5/13

5:21 pm-11:22 pm

1 stop5h 01m

$288

BangorSt. Louis

BGR - STL

BGRSTL

Bangor

Wed 4/22

7:08 am-12:48 pm

1 stop6h 40m

Lambert-St Louis

Wed 4/29

2:33 pm-11:25 pm

1 stop7h 52m

$319

BangorSt. Louis

BGR - STL

BGRSTL

Bangor

Sat 5/2

12:55 pm-11:13 pm

2 stops11h 18m

Lambert-St Louis

Tue 5/5

5:27 pm-11:31 pm

1 stop5h 04m

$324

BangorSt. Louis

BGR - STL

BGRSTL

Bangor

Wed 4/22

5:15 am-11:56 am

2 stops7h 41m

Lambert-St Louis

Wed 4/29

5:27 pm-11:31 pm

1 stop5h 04m

$324

BangorSt. Louis

BGR - STL

BGRSTL

Bangor

Thu 9/3

6:00 am-11:54 am

1 stop6h 54m

Lambert-St Louis

Wed 9/9

1:30 pm-11:28 pm

2 stops8h 58m

$339

PortlandSt. Louis

PWM - STL

PWMSTL

Portland

Wed 4/29

3:55 pm-9:05 pm

1 stop6h 10m

Lambert-St Louis

Sun 5/3

6:50 pm-12:05 am

1 stop4h 15m

$343
Quickest round-trip

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Wed 4/15

5:45 am-7:45 am

Nonstop3h 00m

Lambert-St Louis

Fri 4/17

7:40 pm-11:10 pm

Nonstop2h 30m

$379

BangorSt. Louis

BGR - STL

BGRSTL

Bangor

Fri 4/10

12:28 pm-11:25 pm

2 stops11h 57m

Lambert-St Louis

Tue 4/14

5:27 pm-11:31 pm

1 stop5h 04m

$389

BangorSt. Louis

BGR - STL

BGRSTL

Bangor

Thu 4/9

5:30 am-12:22 pm

1 stop7h 52m

Lambert-St Louis

Mon 4/13

6:48 am-4:19 pm

2 stops8h 31m

$389

BangorSt. Louis

BGR - STL

BGRSTL

Bangor

Fri 9/4

3:00 pm-11:37 pm

2 stops9h 37m

Lambert-St Louis

Tue 9/8

1:30 pm-11:28 pm

2 stops8h 58m

$390

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/24

Showing 1-10 of 55 resultsSorted by cheapest first
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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, October is the cheapest month in which you can book a flight from Maine to St. Louis (average of $161). Flying from Maine to St. Louis in November is currently the most expensive (average of $351). 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.

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

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.

  • How long is the flight from Maine to St. Louis?

    American Airlines, Delta, and Southwest can get you from Maine to St. Louis in just under 5h 42m. Your travel time can differ by up to 5h 36m. The distance from Maine to St. Louis is about 1092 mi. This flight may include one or multiple stops.

  • 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 Delta. Other airlines that offer cheap prices include American Airlines from $159 and United Airlines from $198 one-way.

  • What are the most popular routes 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, October is the cheapest month in which you can book a flight from Maine to St. Louis (average of $161). Flying from Maine to St. Louis in November is currently the most expensive (average of $351). 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
Edwardsville
O'Fallon
Fenton
Swansea
Fairview Heights
Maryland Heights
Collinsville
Eureka
Wentzville
Glencoe
Chesterfield
Alton
Farmington
Festus

Browse thousands of different options on Cheapflights for your next trip

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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.

Top 2 airlines flying from Maine to St. Louis

Discover the top 2 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 March 28, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$236Average$365FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$258Average$449FlexibilityNo cancel feeOn-time71%

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