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

The number of flights available between Maine and St. Louis is 22 per week as of December 2025. The most frequent departure day is Mon, with 32% of weekly flights leaving on this day.

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

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

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 5h 20m on average. Another popular route from Maine to St. Louis is flying from Bangor to St. Louis, which will take roughly 8h 29m. 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 6 operators available for flights from Maine to Lambert-St Louis Airport as of December 2025.

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.

$64 Cheap Flights from Maine to St. Louis in 2025/26

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

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.

5:04 am - 12:33 pm

BGR

STL

8h 29m1 stop

6:25 am - 12:25 pm

STL

BGR

5h 00m1 stop

$294Delta

Wed, Jan 14 - Wed, Jan 28

7:27 pm - 11:59 pm

PWM

STL

5h 32m1 stop

8:05 am - 2:39 pm

STL

PWM

5h 34m1 stop

$299United Airlines

Tue, Jan 27 - Tue, Feb 3

5:04 am - 2:48 pm

BGR

STL

10h 44m2 stops

6:25 am - 12:25 pm

STL

BGR

5h 00m1 stop

$299Delta

Wed, Jan 14 - Wed, Jan 28

7:54 pm - 12:27 am

BGR

STL

29h 33m1 stop

3:49 pm - 3:03 pm

STL

BGR

22h 14m1 stop

$308Multiple Airlines

Thu, Feb 19 - Mon, Feb 23

3:43 pm - 10:33 pm

BOS

STL

7h 50m1 stop

8:32 pm - 4:19 pm

STL

BOS

18h 47m2 stops

$342Multiple Airlines

Fri, Jan 9 - Wed, Jan 14

6:30 am - 9:03 am

BOS

STL

3h 33mnonstop

12:11 pm - 3:50 pm

STL

BOS

2h 39mnonstop

$346American Airlines

Sat, Jan 17 - Mon, Jan 19

7:10 am - 9:30 am

BOS

STL

3h 20mnonstop

6:20 am - 4:50 pm

STL

BOS

9h 30m1 stop

$347Southwest

Sat, Jan 17 - Sun, Jan 18

6:30 am - 9:03 am

BOS

STL

3h 33mnonstop

12:11 pm - 3:50 pm

STL

BOS

2h 39mnonstop

$351American Airlines

Sat, Jan 31 - Tue, Feb 3

12:03 pm - 10:33 pm

BOS

STL

11h 30m1 stop

5:11 pm - 11:10 am

STL

BOS

16h 59m1 stop

$354Frontier

Sat, Jan 10 - Sat, Jan 17

6:00 am - 10:33 pm

BOS

STL

17h 33m2 stops

10:42 am - 9:57 am

STL

BOS

22h 15m1 stop

$359Frontier

Thu, Apr 9 - Sun, Apr 12

Southwest flights from Maine to St. Louis

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

Southwest

Jan 17

BOS7:10 amBoston Logan Intl

3h 20m

STL9:30 amLambert-St Louis

Jan 18

STL6:20 amLambert-St Louis

9h 30m

1 stop

BOS4:50 pmBoston Logan Intl

$347

Find similar

Southwest

Mar 4

BOS6:25 amBoston Logan Intl

3h 20m

STL8:45 amLambert-St Louis

Mar 11

STL11:05 amLambert-St Louis

2h 30m

BOS2:35 pmBoston Logan Intl

$362

Find similar

Southwest

Mar 4

BOS5:30 pmBoston Logan Intl

5h 25m

1 stop

STL9:55 pmLambert-St Louis

Mar 11

STL11:05 amLambert-St Louis

2h 30m

BOS2:35 pmBoston Logan Intl

$372

Find similar

United Airlines flights from Maine to St. Louis

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

United Airlines

Jan 27

PWM7:27 pmPortland

5h 32m

1 stop

STL11:59 pmLambert-St Louis

Feb 3

STL8:05 amLambert-St Louis

5h 34m

1 stop

PWM2:39 pmPortland

$299

Find similar

United Airlines

Jan 27

PWM6:00 amPortland

11h 03m

2 stops

STL4:03 pmLambert-St Louis

Feb 3

STL7:00 amLambert-St Louis

5h 56m

1 stop

PWM1:56 pmPortland

$304

Find similar

United Airlines

Jan 27

PWM6:00 amPortland

9h 30m

2 stops

STL2:30 pmLambert-St Louis

Feb 3

STL6:30 amLambert-St Louis

7h 01m

2 stops

PWM2:31 pmPortland

$309

Find similar

Fly from

Fly to

Route

Depart

Return

Price

BangorSt. Louis

BGR - STL

BGRSTL

Bangor

Wed 1/14

5:04 am-12:33 pm

1 stop8h 29m

Lambert-St Louis

Wed 1/28

6:25 am-12:25 pm

1 stop5h 00m

$294

PortlandSt. Louis

PWM - STL

PWMSTL

Portland

Tue 1/27

7:27 pm-11:59 pm

1 stop5h 32m

Lambert-St Louis

Tue 2/3

8:05 am-2:39 pm

1 stop5h 34m

$299

BangorSt. Louis

BGR - STL

BGRSTL

Bangor

Wed 1/14

5:04 am-2:48 pm

2 stops10h 44m

Lambert-St Louis

Wed 1/28

6:25 am-12:25 pm

1 stop5h 00m

$299

BangorSt. Louis

BGR - STL

BGRSTL

Bangor

Thu 2/19

7:54 pm-12:27 am

1 stop29h 33m

Lambert-St Louis

Mon 2/23

3:49 pm-3:03 pm

1 stop22h 14m

$308

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Fri 1/9

3:43 pm-10:33 pm

1 stop7h 50m

Lambert-St Louis

Wed 1/14

8:32 pm-4:19 pm

2 stops18h 47m

$342

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Sat 1/17

6:30 am-9:03 am

Nonstop3h 33m

Lambert-St Louis

Mon 1/19

12:11 pm-3:50 pm

Nonstop2h 39m

$346

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Sat 1/17

7:10 am-9:30 am

Nonstop3h 20m

Lambert-St Louis

Sun 1/18

6:20 am-4:50 pm

1 stop9h 30m

$347

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Sat 1/31

6:30 am-9:03 am

Nonstop3h 33m

Lambert-St Louis

Tue 2/3

12:11 pm-3:50 pm

Nonstop2h 39m

$351

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Sat 1/10

12:03 pm-10:33 pm

1 stop11h 30m

Lambert-St Louis

Sat 1/17

5:11 pm-11:10 am

1 stop16h 59m

$354

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Thu 4/9

6:00 am-10:33 pm

2 stops17h 33m

Lambert-St Louis

Sun 4/12

10:42 am-9:57 am

1 stop22h 15m

$359

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, February 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 $269. The month of September is another great option to travel to St. Louis, with average flight prices from Maine averaging around $333.

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 55m
Direct flights	Every day
Airports in St. Louis	1 airport

The fastest flight from Maine to St. Louis takes 2h 55m

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

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 6 operators available for flights from Maine to Lambert-St Louis Airport as of December 2025.
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 8,017 reviews		Search Delta flights
American Airlines	PriceFrom $258	Free Cancellation	Rating 7.2 11,073 reviews		Search American Airlines flights

St. Charles

Chesterfield

Hermann

Fairview Heights

Maryland Heights

O'Fallon

Florissant

Fenton

Collinsville

St. Peters

Wentzville

Alton

Farmington

Clayton

Glencoe

Eureka

Festus

Edwardsville

Litchfield

Shrewsbury

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.