What airlines fly to St. Louis?

American Airlines, Delta and United Airlines are the top three most popular airlines that fly to St. Louis from Maine according to our data. American Airlines is the first choice among our users, with 60% of people opting to fly with this airline when traveling to St. Louis. Keep in mind that there are 4 different airlines that fly to St. Louis on a routine basis, so you have a few additional options to choose from.

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

Frontier, United Airlines, and Southwest are the most popular carriers operating from Maine to Lambert-St Louis

How many flights depart from Maine to St. Louis on average per week?

The number of flights available between Maine and St. Louis is 31 per week as of May 2026. The most frequent departure day is Mon, with 23% of weekly flights leaving on this day.

How long does it take to fly to St. Louis?

Flight times from Maine to St. Louis vary, but if you’re flying out of Portland and flying into St. Louis (one of the most popular routes), then the duration is 4h 25m on average. Another popular route from Maine to St. Louis is flying from Bangor to St. Louis, which will take roughly 5h 21m. Keep in mind that layovers or delays could extend your travel time.

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

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

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

There are 7 operators available for flights from Maine to Lambert-St Louis Airport as of May 2026.

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

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 Maine to Lambert-St Louis Airport.

What documentation or ID do you need to fly to Lambert-St Louis Airport?

The travel and health documents you'll need for your trip to Lambert-St Louis Airport 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 Lambert-St Louis Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$115 Cheap Flights from Maine to St. Louis in 2026

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Find the cheapest flights from Maine to St. Louis

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

3:45 pm - 8:46 pm

BGR

STL

6h 01m

1 stop

5:00 pm - 11:22 pm

STL

BGR

5h 22m

1 stop

$288Delta

Fri, Jul 3 - Wed, Jul 8

3:45 pm - 8:46 pm

BGR

STL

6h 01m

1 stop

1:22 pm - 11:22 pm

STL

BGR

9h 00m

2 stops

$293Delta

Fri, Jul 3 - Wed, Jul 8

4:57 pm - 11:23 pm

BGR

STL

7h 26m

2 stops

1:22 pm - 11:22 pm

STL

BGR

9h 00m

2 stops

$307Delta

Fri, Jul 3 - Wed, Jul 8

7:28 pm - 12:16 am

PWM

STL

5h 48m

1 stop

9:25 am - 5:06 pm

STL

PWM

6h 41m

1 stop

$319American Airlines

Tue, Jun 23 - Tue, Jun 30

7:12 pm - 11:36 pm

BGR

STL

5h 24m

1 stop

6:00 am - 2:10 pm

STL

BGR

7h 10m

1 stop

$329United Airlines

Tue, Jun 30 - Sat, Jul 4

12:56 pm - 7:19 pm

BGR

STL

7h 23m

1 stop

1:42 pm - 11:03 pm

STL

BGR

8h 21m

1 stop

$333American Airlines

Sat, Jun 6 - Wed, Jun 10

7:06 pm - 11:35 pm

BGR

STL

5h 29m

1 stop

1:13 pm - 9:47 pm

STL

BGR

7h 34m

1 stop

$339United Airlines

Wed, Jun 17 - Mon, Jun 22

5:35 am - 7:25 am

BOS

STL

2h 50mnonstop

7:10 pm - 10:45 pm

STL

BOS

2h 35mnonstop

$344Southwest

Mon, Jul 20 - Wed, Jul 22

5:50 am - 7:45 am

BOS

STL

2h 55mnonstop

4:35 pm - 12:05 am

STL

BOS

6h 30m

2 stops

$347Southwest

Sat, Jun 13 - Mon, Jun 15

11:52 am - 8:57 am

BOS

STL

22h 05m

1 stop

5:33 pm - 1:27 am

STL

BOS

6h 54m

1 stop

$350Frontier

Sun, Aug 16 - Sat, Aug 22

American Airlines flights from Maine to St. Louis

Our best American Airlines deals on Maine to St. Louis flight tickets

American Airlines

Jun 23

PWM7:28 pmPortland

5h 48m

1 stop

STL12:16 amLambert-St Louis

Jun 30

STL9:25 amLambert-St Louis

6h 41m

1 stop

PWM5:06 pmPortland

$319

American Airlines

Jun 6

BGR12:56 pmBangor

7h 23m

1 stop

STL7:19 pmLambert-St Louis

Jun 10

STL1:42 pmLambert-St Louis

8h 21m

1 stop

BGR11:03 pmBangor

$333

American Airlines

Aug 18

BOS5:22 pmBoston Logan Intl

3h 08m

STL7:30 pmLambert-St Louis

Aug 22

STL7:38 pmLambert-St Louis

2h 44m

BOS11:22 pmBoston Logan Intl

$345

United Airlines flights from Maine to St. Louis

Our best United Airlines deals on Maine to St. Louis flight tickets

United Airlines

Jun 30

BGR7:12 pmBangor

5h 24m

1 stop

STL11:36 pmLambert-St Louis

Jul 4

STL6:00 amLambert-St Louis

7h 10m

1 stop

BGR2:10 pmBangor

$329

United Airlines

Jun 17

BGR7:06 pmBangor

5h 29m

1 stop

STL11:35 pmLambert-St Louis

Jun 22

STL1:13 pmLambert-St Louis

7h 34m

1 stop

BGR9:47 pmBangor

$339

United Airlines

Jun 3

BOS5:05 pmBoston Logan Intl

5h 25m

1 stop

STL9:30 pmLambert-St Louis

Jun 7

STL5:29 pmLambert-St Louis

4h 52m

1 stop

BOS11:21 pmBoston Logan Intl

$356

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BangorSt. Louis

BGR - STL

BGRSTL

Bangor

Fri 7/3

3:45 pm-8:46 pm

1 stop6h 01m

Lambert-St Louis

Wed 7/8

5:00 pm-11:22 pm

1 stop5h 22m

$288

BangorSt. Louis

BGR - STL

BGRSTL

Bangor

Fri 7/3

3:45 pm-8:46 pm

1 stop6h 01m

Lambert-St Louis

Wed 7/8

1:22 pm-11:22 pm

2 stops9h 00m

$293

BangorSt. Louis

BGR - STL

BGRSTL

Bangor

Fri 7/3

4:57 pm-11:23 pm

2 stops7h 26m

Lambert-St Louis

Wed 7/8

1:22 pm-11:22 pm

2 stops9h 00m

$307

PortlandSt. Louis

PWM - STL

PWMSTL

Portland

Tue 6/23

7:28 pm-12:16 am

1 stop5h 48m

Lambert-St Louis

Tue 6/30

9:25 am-5:06 pm

1 stop6h 41m

$319

BangorSt. Louis

BGR - STL

BGRSTL

Bangor

Tue 6/30

7:12 pm-11:36 pm

1 stop5h 24m

Lambert-St Louis

Sat 7/4

6:00 am-2:10 pm

1 stop7h 10m

$329

BangorSt. Louis

BGR - STL

BGRSTL

Bangor

Sat 6/6

12:56 pm-7:19 pm

1 stop7h 23m

Lambert-St Louis

Wed 6/10

1:42 pm-11:03 pm

1 stop8h 21m

$333

BangorSt. Louis

BGR - STL

BGRSTL

Bangor

Wed 6/17

7:06 pm-11:35 pm

1 stop5h 29m

Lambert-St Louis

Mon 6/22

1:13 pm-9:47 pm

1 stop7h 34m

$339

Quickest round-trip

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Mon 7/20

5:35 am-7:25 am

Nonstop2h 50m

Lambert-St Louis

Wed 7/22

7:10 pm-10:45 pm

Nonstop2h 35m

$344

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Sat 6/13

5:50 am-7:45 am

Nonstop2h 55m

Lambert-St Louis

Mon 6/15

4:35 pm-12:05 am

2 stops6h 30m

$347

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Sun 8/16

11:52 am-8:57 am

1 stop22h 05m

Lambert-St Louis

Sat 8/22

5:33 pm-1:27 am

1 stop6h 54m

$350

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 Maine to St. Louis

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

Other information

What is the cheapest month to fly to St. Louis?

In general, October is the cheapest month to fly from Maine to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $142. The month of September is another great option to travel to St. Louis, with average flight prices from Maine averaging around $182.

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

You could potentially save up to 85% on your flight if you consider stops on a Maine to St. Louis flight.

Cheap Maine to St. Louis flight deals and tips

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

Fastest flight time	2h 50m
Direct flights	Every day
Airports in St. Louis	1 airport

The fastest flight from Maine to St. Louis takes 2h 50m

Direct flights go from Maine to St. Louis every day.

There is 1 airport in St. Louis. From Maine there are direct flights to Lambert-St Louis (STL).

Search flight deals

Frequently asked questions about flying from Maine to St. Louis

When did momondo last update prices for flights from Maine to Lambert-St Louis Airport?
Prices for flights from Maine to Lambert-St Louis Airport are updated daily.
How many operators does momondo search for flights from Maine to Lambert-St Louis Airport?
There are 7 operators available for flights from Maine to Lambert-St Louis Airport as of May 2026.
How old do you have to be to fly from Maine to Lambert-St Louis Airport?
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 Maine to Lambert-St Louis Airport.
What documentation or ID do you need to fly to Lambert-St Louis Airport?
The travel and health documents you'll need for your trip to Lambert-St Louis Airport 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 Lambert-St Louis Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Maine to St. Louis

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

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $236	Free Cancellation	Rating 7.9 8,425 reviews	Search Delta flights
United Airlines	PriceFrom $254	Free Cancellation	Rating 7.4 9,749 reviews	Search United Airlines flights
American Airlines	PriceFrom $284	Free Cancellation	Rating 7.1 11,629 reviews	Search American Airlines flights
Southwest	PriceFrom $348	Free Cancellation	Rating 8.0 4,266 reviews	Search Southwest flights

St. Charles

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Fairview Heights

Hermann

Maryland Heights

O'Fallon

Florissant

St. Peters

Collinsville

Alton

Wentzville

Fenton

Farmington

Festus

Eureka

Litchfield

Clayton

Edwardsville

Shrewsbury

Grafton

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Maine to St. Louis. Millions of users trust and use momondo every year so you are in good hands.

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

Flights from Maine to St. Louis with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to St. Louis from Maine.

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

If you are not ready to book a flight from Maine to St. Louis now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to St. Louis and let you know when they change.

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Cheap flights from Maine to St. Louis from $115

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Maine to St. Louis departing on 7/21. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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

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

What airlines fly to St. Louis?

How many flights depart from Maine to St. Louis on average per week?

How long does it take to fly to St. Louis?

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