What is the cheapest airline that flies from Lambert-St Louis to Maine?

Delta and Southwest are the most popular carriers operating from Lambert-St Louis to Maine

What airlines fly to Maine?

American Airlines, Delta and United Airlines are the top three most popular airlines that fly to Maine from St. Louis according to our data. American Airlines is the first choice among our users, with 64% of people opting to fly with this airline when traveling to Maine. Keep in mind that there are 4 different airlines that fly to Maine on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Lambert-St Louis Airport to Maine?

Prices for flights from Lambert-St Louis Airport to Maine refresh daily.

How many operators does momondo search for flights from Lambert-St Louis Airport to Maine?

There are 4 operators available for flights from Lambert-St Louis Airport to Maine as of November 2026.

How old do you have to be to fly from Lambert-St Louis Airport to Maine?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Maine.

What documentation or ID do you need to fly to Maine?

The travel and health documents you'll need for your trip to Maine may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Maine. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$170 Cheap Flights from St. Louis to Maine in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from St. Louis to Maine

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:20 pm - 9:08 amSTL Lambert-St Louis-PWM Portland

13h 48m1 stop Orlando

7:12 pm - 10:53 amPWM Portland-STL Lambert-St Louis

40h 41m2 stops Tampa Atlanta Hartsfield-Jackson

$286Multiple Airlines

Tue, Dec 8 - Wed, Dec 16

12:02 pm - 9:08 amSTL Lambert-St Louis-PWM Portland

44h 06m2 stops Atlanta Hartsfield-Jackson Orlando

9:48 am - 12:12 amPWM Portland-STL Lambert-St Louis

15h 24m1 stop Orlando

$292Multiple Airlines

Wed, Dec 9 - Wed, Dec 16

5:02 am - 11:58 amSTL Lambert-St Louis-PWM Portland

5h 56m1 stop Chicago O'Hare Intl

12:44 pm - 6:49 pmPWM Portland-STL Lambert-St Louis

7h 05m1 stop Chicago O'Hare Intl

$339American Airlines

Wed, Dec 9 - Wed, Dec 16

2:33 pm - 11:33 pmSTL Lambert-St Louis-PWM Portland

8h 00m1 stop Atlanta Hartsfield-Jackson

4:53 pm - 8:32 pmPWM Portland-STL Lambert-St Louis

4h 39m1 stop Detroit Metropolitan Wayne County

$339Delta

Sat, Dec 12 - Mon, Dec 14

10:14 am - 4:11 pmSTL Lambert-St Louis-PWM Portland

4h 57m1 stop Detroit Metropolitan Wayne County

6:12 am - 11:51 amPWM Portland-STL Lambert-St Louis

6h 39m1 stop New York LaGuardia

$339Delta

Tue, Dec 8 - Tue, Dec 15

1:18 pm - 11:24 pmSTL Lambert-St Louis-PWM Portland

9h 06m2 stops Chicago O'Hare Intl Newark

4:47 pm - 9:23 pmPWM Portland-STL Lambert-St Louis

5h 36m1 stop Chicago O'Hare Intl

$344United Airlines

Mon, Dec 14 - Wed, Dec 16

3:25 pm - 9:29 pmSTL Lambert-St Louis-PWM Portland

5h 04m1 stop Chicago O'Hare Intl

6:00 am - 2:41 pmPWM Portland-STL Lambert-St Louis

9h 41m2 stops Newark Chicago O'Hare Intl

$344United Airlines

Sat, Dec 5 - Tue, Dec 15

3:41 pm - 11:59 pmSTL Lambert-St Louis-BGR Bangor

7h 18m1 stop Washington, D.C. Reagan-National

4:24 pm - 9:41 pmBGR Bangor-STL Lambert-St Louis

6h 17m1 stop Washington, D.C. Reagan-National

$359American Airlines

Mon, Dec 7 - Mon, Dec 14

4:15 pm - 9:50 pmSTL Lambert-St Louis-PWM Portland

4h 35m1 stop Baltimore/Washington

12:45 pm - 7:25 pmPWM Portland-STL Lambert-St Louis

7h 40m2 stops Baltimore/Washington Pittsburgh

$368Southwest

Sat, Dec 5 - Tue, Dec 15

6:35 am - 2:45 pmSTL Lambert-St Louis-PWM Portland

7h 10m1 stop Baltimore/Washington

12:45 pm - 6:05 pmPWM Portland-STL Lambert-St Louis

6h 20m1 stop Baltimore/Washington

$378Southwest

Wed, Dec 2 - Thu, Dec 10

Cheap last minute flights

Enter your travel dates to find the best prices.

3:51 pm - 12:08 amSTL Lambert-St Louis-BGR Bangor

7h 17m1 stop Washington, D.C. Reagan-National

6:00 am - 12:43 pmBGR Bangor-STL Lambert-St Louis

7h 43m1 stop Philadelphia

$426American Airlines

Wed, Nov 11 - Sat, Nov 14

3:51 pm - 12:08 amSTL Lambert-St Louis-BGR Bangor

7h 17m1 stop Washington, D.C. Reagan-National

12:39 pm - 7:37 pmBGR Bangor-STL Lambert-St Louis

7h 58m1 stop Washington, D.C. Reagan-National

$453American Airlines

Wed, Nov 11 - Sat, Nov 14

3:51 pm - 12:08 amSTL Lambert-St Louis-BGR Bangor

7h 17m1 stop Washington, D.C. Reagan-National

12:39 pm - 11:59 pmBGR Bangor-STL Lambert-St Louis

12h 20m2 stops Washington, D.C. Reagan-National Chicago O'Hare Intl

$671American Airlines

Wed, Nov 11 - Sat, Nov 14

3:51 pm - 12:08 amSTL Lambert-St Louis-BGR Bangor

7h 17m1 stop Washington, D.C. Reagan-National

6:00 am - 4:46 pmBGR Bangor-STL Lambert-St Louis

11h 46m2 stops Philadelphia Chicago O'Hare Intl

$671American Airlines

Wed, Nov 11 - Sat, Nov 14

12:29 pm - 11:25 pmSTL Lambert-St Louis-BGR Bangor

9h 56m2 stops Atlanta Hartsfield-Jackson New York LaGuardia

6:00 am - 4:23 pmBGR Bangor-STL Lambert-St Louis

11h 23m2 stops New York LaGuardia Atlanta Hartsfield-Jackson

$690Delta

Wed, Nov 11 - Sat, Nov 14

6:00 am - 10:19 amSTL Lambert-St Louis-BGR Bangor

27h 19m2 stops Chicago O'Hare Intl Newark

11:00 am - 7:23 pmBGR Bangor-STL Lambert-St Louis

9h 23m2 stops Newark Chicago O'Hare Intl

$859United Airlines

Wed, Nov 11 - Sat, Nov 14

5:00 pm - 11:21 pmSTL Lambert-St Louis-PWM Portland

5h 21m1 stop Newark

6:00 am - 10:44 amPWM Portland-STL Lambert-St Louis

5h 44m1 stop Newark

$909United Airlines

Wed, Nov 11 - Sat, Nov 14

3:15 pm - 11:21 pmSTL Lambert-St Louis-PWM Portland

7h 06m2 stops Chicago O'Hare Intl Newark

5:50 am - 10:47 amPWM Portland-STL Lambert-St Louis

5h 57m1 stop Newark

$990United Airlines

Fri, Nov 13 - Sun, Nov 15

1:00 pm - 7:02 pmSTL Lambert-St Louis-PWM Portland

5h 02m1 stop Washington, D.C. Dulles Intl

5:30 am - 10:12 amPWM Portland-STL Lambert-St Louis

5h 42m1 stop Washington, D.C. Dulles Intl

$991United Airlines

Fri, Nov 13 - Sun, Nov 15

1:05 pm - 11:55 pmSTL Lambert-St Louis-PWM Portland

9h 50m2 stops Chicago Midway Baltimore/Washington

1:40 pm - 9:00 pmPWM Portland-STL Lambert-St Louis

8h 20m2 stops Baltimore/Washington Atlanta Hartsfield-Jackson

$1,097Southwest

Fri, Nov 13 - Sun, Nov 15

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Delta flights from St. Louis to Maine

Our best Delta deals on St. Louis to Maine flight tickets

Delta

Dec 3

STL5:00 pmLambert-St Louis

5h 20m

1 stop

PWM11:20 pmPortland

Dec 10

PWM6:00 amPortland

6h 29m

1 stop

STL11:29 amLambert-St Louis

$339

Delta

Dec 5

STL2:00 pmLambert-St Louis

6h 21m

1 stop

PWM9:21 pmPortland

Dec 15

PWM6:00 amPortland

8h 28m

1 stop

STL1:28 pmLambert-St Louis

$363

Delta

Dec 7

STL2:17 pmLambert-St Louis

8h 09m

2 stops

BGR11:26 pmBangor

Dec 14

BGR5:10 amBangor

7h 41m

1 stop

STL11:51 amLambert-St Louis

$364

Southwest flights from St. Louis to Maine

Our best Southwest deals on St. Louis to Maine flight tickets

Southwest

Dec 2

STL6:35 amLambert-St Louis

7h 10m

1 stop

PWM2:45 pmPortland

Dec 10

PWM12:45 pmPortland

6h 20m

1 stop

STL6:05 pmLambert-St Louis

$378

Southwest

Dec 2

STL6:35 amLambert-St Louis

4h 35m

1 stop

PWM12:10 pmPortland

Dec 10

PWM12:45 pmPortland

7h 40m

2 stops

STL7:25 pmLambert-St Louis

$383

Southwest

Dec 5

STL2:15 pmLambert-St Louis

6h 35m

2 stops

PWM9:50 pmPortland

Dec 15

PWM12:45 pmPortland

7h 40m

2 stops

STL7:25 pmLambert-St Louis

$388

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisPortland

STL Lambert-St Louis - PWM Portland

STLPWM

Lambert-St Louis

Tue 12/8

6:20 pm-9:08 am

1 stop13h 48m

Portland

Wed 12/16

7:12 pm-10:53 am

2 stops40h 41m

$286

St. LouisPortland

STL Lambert-St Louis - PWM Portland

STLPWM

Lambert-St Louis

Wed 12/9

12:02 pm-9:08 am

2 stops44h 06m

Portland

Wed 12/16

9:48 am-12:12 am

1 stop15h 24m

$292

St. LouisPortland

STL Lambert-St Louis - PWM Portland

STLPWM

Lambert-St Louis

Wed 12/9

5:02 am-11:58 am

1 stop5h 56m

Portland

Wed 12/16

12:44 pm-6:49 pm

1 stop7h 05m

$339

St. LouisPortland

STL Lambert-St Louis - PWM Portland

STLPWM

Lambert-St Louis

Sat 12/12

2:33 pm-11:33 pm

1 stop8h 00m

Portland

Mon 12/14

4:53 pm-8:32 pm

1 stop4h 39m

$339

Quickest round-trip

St. LouisPortland

STL Lambert-St Louis - PWM Portland

STLPWM

Lambert-St Louis

Tue 12/8

10:14 am-4:11 pm

1 stop4h 57m

Portland

Tue 12/15

6:12 am-11:51 am

1 stop6h 39m

$339

St. LouisPortland

STL Lambert-St Louis - PWM Portland

STLPWM

Lambert-St Louis

Mon 12/14

1:18 pm-11:24 pm

2 stops9h 06m

Portland

Wed 12/16

4:47 pm-9:23 pm

1 stop5h 36m

$344

St. LouisPortland

STL Lambert-St Louis - PWM Portland

STLPWM

Lambert-St Louis

Sat 12/5

3:25 pm-9:29 pm

1 stop5h 04m

Portland

Tue 12/15

6:00 am-2:41 pm

2 stops9h 41m

$344

St. LouisBangor

STL Lambert-St Louis - BGR Bangor

STLBGR

Lambert-St Louis

Mon 12/7

3:41 pm-11:59 pm

1 stop7h 18m

Bangor

Mon 12/14

4:24 pm-9:41 pm

1 stop6h 17m

$359

St. LouisPortland

STL Lambert-St Louis - PWM Portland

STLPWM

Lambert-St Louis

Sat 12/5

4:15 pm-9:50 pm

1 stop4h 35m

Portland

Tue 12/15

12:45 pm-7:25 pm

2 stops7h 40m

$368

St. LouisPortland

STL Lambert-St Louis - PWM Portland

STLPWM

Lambert-St Louis

Wed 12/2

6:35 am-2:45 pm

1 stop7h 10m

Portland

Thu 12/10

12:45 pm-6:05 pm

1 stop6h 20m

$378

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from St. Louis to Maine

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest month to fly to Maine?

The cheapest month to fly to Maine from St. Louis is in April. Flight prices, which tend to average around $339, are often lower during this time because this is during the off-season. If you aren’t able to travel to Maine during the month of April, then flying in March is also cheap. Prices for this month can be found on momondo for an average of $357.

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

You are more likely to see cheaper flights to Maine from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Maine for around $431 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Maine from St. Louis for as low as $363 on momondo.

Can stopping save me money on St. Louis to Maine flights?

You could potentially save up to 18% on your flight if you consider stops on a St. Louis to Maine flight.

Cheap St. Louis to Maine flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Maine

Best Price Found	$170
Fastest flight time	2h 30m
Direct flights	None

The best one-way flight to Maine from St. Louis in the past 72 hours is $170. The best round-trip flight deal from St. Louis to Maine found on momondo in the last 72 hours is $286.

The fastest flight from St. Louis to Maine takes 2h 30m

There are no direct flights from St. Louis to Maine. There are no popular flight routes from St. Louis to Maine.

Search flight deals

Frequently asked questions about flying from St. Louis to Maine

When did momondo last update prices for flights from Lambert-St Louis Airport to Maine?
Prices for flights from Lambert-St Louis Airport to Maine refresh daily.
How many operators does momondo search for flights from Lambert-St Louis Airport to Maine?
There are 4 operators available for flights from Lambert-St Louis Airport to Maine as of November 2026.
How old do you have to be to fly from Lambert-St Louis Airport to Maine?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Maine.
What documentation or ID do you need to fly to Maine?
The travel and health documents you'll need for your trip to Maine may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Maine. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from St. Louis to Maine

Compare and see reviews for airlines that fly from St. Louis to Maine with momondo

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $264	Free Cancellation	Rating 7.3 10,470 reviews	Search United Airlines flights
American Airlines	PriceFrom $278	Free Cancellation	Rating 7.0 12,228 reviews	Search American Airlines flights
Delta	PriceFrom $287	Free Cancellation	Rating 7.8 8,699 reviews	Search Delta flights
Southwest	PriceFrom $358	Free Cancellation	Rating 8.0 4,216 reviews	Search Southwest flights

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Maine?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from St. Louis to Maine for you.

Can I find flights from St. Louis to Maine with flexible booking policies on momondo?

Yes. All flights to Maine from St. Louis on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from St. Louis to Maine?

momondo provides multiple filters to help you find the best flight to Maine from St. Louis. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from St. Louis to Maine right now. Can momondo alert me if prices change?

Price alerts on flights to Maine from St. Louis are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.