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

The number of flights available between Maine and St. Louis is 32 per week as of September 2025. The most frequent departure day is Mon, with 19% 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 Bangor and flying into St. Louis (one of the most popular routes), then the duration is 5h 08m on average. Another popular route from Maine to St. Louis is flying from Portland to St. Louis, which will take roughly 5h 12m. 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?

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

What airlines fly to St. Louis?

American Airlines, Delta and Southwest 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 61% 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.

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 September 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.

$98 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

Direct

Cheap round-trip flights

4:20 pm - 8:20 pmBOS-STL

5h 00m1 stop

1:59 pm - 11:59 pmSTL-BOS

9h 00m1 stop

$280American Airlines

Find Deal

Wed, Dec 3 - Sat, Dec 6

9:48 pm - 11:01 amBOS-STL

14h 13m1 stop

12:20 pm - 12:40 amSTL-BOS

11h 20m1 stop

$285Spirit Airlines

Find Deal

Wed, Feb 25 - Sun, Mar 1

8:24 pm - 6:10 pmBOS-STL

22h 46m1 stop

6:05 pm - 1:20 pmSTL-BOS

18h 15m1 stop

$287Multiple Airlines

Find Deal

Fri, Oct 24 - Mon, Oct 27

6:57 pm - 6:36 pmBOS-STL

24h 39m2 stops

2:48 pm - 12:40 amSTL-BOS

8h 52m1 stop

$290Multiple Airlines

Find Deal

Sat, Jan 31 - Sat, Feb 7

9:18 am - 5:10 pmBOS-STL

8h 52m1 stop

1:41 pm - 8:33 amSTL-BOS

17h 52m1 stop

$295Frontier

Find Deal

Fri, Oct 17 - Sun, Oct 19

4:23 pm - 11:57 pmBOS-STL

8h 34m1 stop

5:00 am - 11:02 amSTL-BOS

5h 02m1 stop

$308United Airlines

Find Deal

Wed, Oct 22 - Thu, Oct 23

6:01 am - 12:20 pmPWM-STL

7h 19m1 stop

1:55 pm - 10:19 pmSTL-PWM

7h 24m1 stop

$312Delta

Find Deal

Thu, Nov 6 - Wed, Nov 12

6:00 am - 10:49 amBOS-STL

5h 49m1 stop

5:28 pm - 12:50 amSTL-BOS

6h 22m1 stop

$319United Airlines

Find Deal

Thu, Oct 16 - Mon, Oct 20

8:55 pm - 4:32 pmBOS-STL

20h 37m2 stops

10:45 am - 3:56 pmSTL-BOS

4h 11m1 stop

$345Delta

Find Deal

Fri, Nov 7 - Wed, Nov 12

10:04 am - 9:07 amBOS-STL

24h 03m2 stops

3:14 pm - 12:44 amSTL-BOS

8h 30m1 stop

$350Frontier

Find Deal

Sun, Nov 16 - Thu, Nov 20

American Airlines flights from Maine to St. Louis

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

American Airlines

Dec 3

BOS4:20 pmBoston Logan Intl

5h 00m

1 stop

STL8:20 pmLambert-St Louis

Dec 6

STL1:59 pmLambert-St Louis

9h 00m

1 stop

BOS11:59 pmBoston Logan Intl

$280

Find similar

American Airlines

Oct 18

BOS8:00 amBoston Logan Intl

9h 04m

1 stop

STL4:04 pmLambert-St Louis

Oct 20

STL6:03 amLambert-St Louis

5h 00m

1 stop

BOS12:03 pmBoston Logan Intl

$286

Find similar

American Airlines

Dec 25

BOS7:57 amBoston Logan Intl

6h 17m

1 stop

STL1:14 pmLambert-St Louis

Jan 1

STL2:06 pmLambert-St Louis

8h 45m

1 stop

BOS11:51 pmBoston Logan Intl

$296

Find similar

Southwest flights from Maine to St. Louis

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

Southwest

Nov 8

PWM12:40 pmPortland

7h 50m

1 stop

STL7:30 pmLambert-St Louis

Nov 12

STL1:15 pmLambert-St Louis

8h 00m

2 stops

PWM10:15 pmPortland

$317

Find similar

Southwest

Oct 30

BOS6:55 amBoston Logan Intl

3h 05m

STL9:00 amLambert-St Louis

Nov 19

STL1:50 pmLambert-St Louis

2h 30m

BOS5:20 pmBoston Logan Intl

$333

Find similar

Southwest

Dec 4

BOS7:45 amBoston Logan Intl

7h 05m

2 stops

STL1:50 pmLambert-St Louis

Dec 10

STL8:15 amLambert-St Louis

2h 30m

BOS11:45 amBoston Logan Intl

$348

Find similar

Fly from

Fly to

Route

Depart

Return

Price

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Wed 12/3

4:20 pm-8:20 pm

1 stop5h 00m

Lambert-St Louis

Sat 12/6

1:59 pm-11:59 pm

1 stop9h 00m

$280

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Wed 2/25

9:48 pm-11:01 am

1 stop14h 13m

Lambert-St Louis

Sun 3/1

12:20 pm-12:40 am

1 stop11h 20m

$285

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Fri 10/24

8:24 pm-6:10 pm

1 stop22h 46m

Lambert-St Louis

Mon 10/27

6:05 pm-1:20 pm

1 stop18h 15m

$287

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Sat 1/31

6:57 pm-6:36 pm

2 stops24h 39m

Lambert-St Louis

Sat 2/7

2:48 pm-12:40 am

1 stop8h 52m

$290

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Fri 10/17

9:18 am-5:10 pm

1 stop8h 52m

Lambert-St Louis

Sun 10/19

1:41 pm-8:33 am

1 stop17h 52m

$295

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Wed 10/22

4:23 pm-11:57 pm

1 stop8h 34m

Lambert-St Louis

Thu 10/23

5:00 am-11:02 am

1 stop5h 02m

$308

PortlandSt. Louis

PWM - STL

PWMSTL

Portland

Thu 11/6

6:01 am-12:20 pm

1 stop7h 19m

Lambert-St Louis

Wed 11/12

1:55 pm-10:19 pm

1 stop7h 24m

$312

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Thu 10/16

6:00 am-10:49 am

1 stop5h 49m

Lambert-St Louis

Mon 10/20

5:28 pm-12:50 am

1 stop6h 22m

$319

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Fri 11/7

8:55 pm-4:32 pm

2 stops20h 37m

Lambert-St Louis

Wed 11/12

10:45 am-3:56 pm

1 stop4h 11m

$345

BostonSt. Louis

BOS - STL

BOSSTL

Boston Logan Intl

Sun 11/16

10:04 am-9:07 am

2 stops24h 03m

Lambert-St Louis

Thu 11/20

3:14 pm-12:44 am

1 stop8h 30m

$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, 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 $250. 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 September 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 7,964 reviews	Search Delta flights
American Airlines	PriceFrom $241	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
United Airlines	PriceFrom $341	Free Cancellation	Rating 7.4 8,926 reviews	Search United Airlines flights
Southwest	PriceFrom $371	Free Cancellation	Rating 8.0 4,242 reviews	Search Southwest flights

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O'Fallon

Fenton

Collinsville

Wentzville

Alton

St. Peters

Farmington

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Glencoe

Clayton

Edwardsville

Eureka

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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.