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

The number of flights available between Maine and St. Louis is 35 per week as of November 2025. The most frequent departure day is Mon, with 17% 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 5h 34m on average. Another popular route from Maine to St. Louis is flying from Bangor to St. Louis, which will take roughly 8h 48m. Keep in mind that layovers or delays could extend your travel time.

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

Frontier, American Airlines, and Spirit Airlines are the most popular carriers operating from Maine to Lambert-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 6 operators available for flights from Maine to Lambert-St Louis Airport as of November 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.

$61 Cheap Flights from Maine to St. Louis in 2025/26

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Find the cheapest flights from Maine to St. Louis

Round-trip

One-way

Last minute

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Cheap round-trip flights

Enter your travel dates to find the best prices.

7:43 pm - 11:57 pmBGR-STL

29h 14m1 stop

4:13 pm - 6:53 pmSTL-BGR

25h 40m1 stop

$270Multiple Airlines

Find Deal

Thu, Nov 20 - Mon, Nov 24

4:53 pm - 8:47 pmPWM-STL

4h 54m1 stop

5:15 pm - 11:21 pmSTL-PWM

5h 06m1 stop

$299Delta

Find Deal

Wed, Dec 3 - Wed, Dec 10

6:00 am - 1:02 pmPWM-STL

8h 02m2 stops

5:15 pm - 11:21 pmSTL-PWM

5h 06m1 stop

$304Delta

Find Deal

Wed, Dec 3 - Wed, Dec 10

6:00 am - 12:15 pmBOS-STL

7h 15m1 stop

6:42 pm - 2:20 pmSTL-BOS

18h 38m1 stop

$318United Airlines

Find Deal

Tue, Dec 9 - Fri, Dec 12

6:25 am - 8:45 amBOS-STL

3h 20mnonstop

5:55 pm - 9:25 pmSTL-BOS

2h 30mnonstop

$319Southwest

Find Deal

Tue, Jan 6 - Tue, Jan 13

6:36 am - 4:23 pmBOS-STL

10h 47m1 stop

10:01 am - 1:43 pmSTL-BOS

2h 42mnonstop

$322American Airlines

Find Deal

Wed, Dec 31 - Sat, Jan 3

5:30 am - 12:15 pmBOS-STL

7h 45m2 stops

6:42 pm - 2:20 pmSTL-BOS

18h 38m1 stop

$323United Airlines

Find Deal

Tue, Dec 9 - Fri, Dec 12

5:07 pm - 9:51 pmPWM-STL

5h 44m1 stop

6:00 am - 12:06 pmSTL-PWM

5h 06m1 stop

$323American Airlines

Find Deal

Mon, Jan 19 - Wed, Jan 21

6:00 am - 2:29 pmBOS-STL

9h 29m1 stop

3:30 pm - 9:27 amSTL-BOS

16h 57m1 stop

$331Frontier

Find Deal

Thu, Nov 27 - Sat, Dec 6

7:20 pm - 9:30 pmBOS-STL

3h 10mnonstop

1:50 pm - 5:20 pmSTL-BOS

2h 30mnonstop

$344Southwest

Find Deal

Sun, Dec 7 - Tue, Dec 9

Frontier flights from Maine to St. Louis

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

Frontier

Nov 27

BOS6:00 amBoston Logan Intl

9h 29m

1 stop

STL2:29 pmLambert-St Louis

Dec 6

STL3:30 pmLambert-St Louis

16h 57m

1 stop

BOS9:27 amBoston Logan Intl

$331

Find similar

Frontier

Nov 14

BOS9:55 amBoston Logan Intl

7h 06m

1 stop

STL4:01 pmLambert-St Louis

Nov 16

STL2:12 pmLambert-St Louis

17h 16m

1 stop

BOS8:28 amBoston Logan Intl

$416

Find similar

Frontier

Nov 10

BOS9:55 amBoston Logan Intl

48h 12m

2 stops

STL9:07 amLambert-St Louis

Nov 14

STL4:56 pmLambert-St Louis

16h 52m

1 stop

BOS10:48 amBoston Logan Intl

$441

Find similar

American Airlines flights from Maine to St. Louis

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

American Airlines

Dec 31

BOS6:36 amBoston Logan Intl

10h 47m

1 stop

STL4:23 pmLambert-St Louis

Jan 3

STL10:01 amLambert-St Louis

2h 42m

BOS1:43 pmBoston Logan Intl

$322

Find similar

American Airlines

Jan 19

PWM5:07 pmPortland

5h 44m

1 stop

STL9:51 pmLambert-St Louis

Jan 21

STL6:00 amLambert-St Louis

5h 06m

1 stop

PWM12:06 pmPortland

$323

Find similar

American Airlines

Dec 8

BOS8:50 amBoston Logan Intl

3h 24m

STL11:14 amLambert-St Louis

Dec 10

STL11:50 amLambert-St Louis

2h 40m

BOS3:30 pmBoston Logan Intl

$327

Find similar

Fly from

Fly to

Route

Depart

Return

Price

BangorSt. Louis

BGR - STL

BGRSTL

Bangor

Thu 11/20

7:43 pm-11:57 pm

1 stop29h 14m

Lambert-St Louis

Mon 11/24

4:13 pm-6:53 pm

1 stop25h 40m

$270

PortlandSt. Louis

PWM - STL

PWMSTL

Portland

Wed 12/3

4:53 pm-8:47 pm

1 stop4h 54m

Lambert-St Louis

Wed 12/10

5:15 pm-11:21 pm

1 stop5h 06m

$299

PortlandSt. Louis

PWM - STL

PWMSTL

Portland

Wed 12/3

6:00 am-1:02 pm

2 stops8h 02m

Lambert-St Louis

Wed 12/10

5:15 pm-11:21 pm

1 stop5h 06m

$304

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Tue 12/9

6:00 am-12:15 pm

1 stop7h 15m

Lambert-St Louis

Fri 12/12

6:42 pm-2:20 pm

1 stop18h 38m

$318

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Tue 1/6

6:25 am-8:45 am

Nonstop3h 20m

Lambert-St Louis

Tue 1/13

5:55 pm-9:25 pm

Nonstop2h 30m

$319

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Wed 12/31

6:36 am-4:23 pm

1 stop10h 47m

Lambert-St Louis

Sat 1/3

10:01 am-1:43 pm

Nonstop2h 42m

$322

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Tue 12/9

5:30 am-12:15 pm

2 stops7h 45m

Lambert-St Louis

Fri 12/12

6:42 pm-2:20 pm

1 stop18h 38m

$323

PortlandSt. Louis

PWM - STL

PWMSTL

Portland

Mon 1/19

5:07 pm-9:51 pm

1 stop5h 44m

Lambert-St Louis

Wed 1/21

6:00 am-12:06 pm

1 stop5h 06m

$323

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Thu 11/27

6:00 am-2:29 pm

1 stop9h 29m

Lambert-St Louis

Sat 12/6

3:30 pm-9:27 am

1 stop16h 57m

$331

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Sun 12/7

7:20 pm-9:30 pm

Nonstop3h 10m

Lambert-St Louis

Tue 12/9

1:50 pm-5:20 pm

Nonstop2h 30m

$344

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 $340.

What is the cheapest day to depart on your flight to St. Louis?

The cheapest day to depart on your flight to St. Louis is on a Tuesday when prices can be found for as low as $443. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around $638. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

What is the cheapest time of day to depart on your flight to St. Louis?

Flying to St. Louis from Maine in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $441 when looking at flights departing in the afternoon. At noon is when there is more demand to fly to St. Louis, so prices are often more expensive at around $609 per ticket.

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	3h 00m
Direct flights	Every day
Airports in St. Louis	1 airport

The fastest flight from Maine to St. Louis takes 3h 00m

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

There is 1 airport near St. Louis: 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 November 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 8,001 reviews		Search Delta flights
American Airlines	PriceFrom $258	Free Cancellation	Rating 7.2 11,040 reviews		Search American Airlines flights

St. Charles

Chesterfield

Hermann

Fairview Heights

Florissant

Maryland Heights

O'Fallon

Wentzville

Fenton

Collinsville

St. Peters

Alton

Farmington

Festus

Glencoe

Edwardsville

Clayton

Eureka

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.