$112+ Cheap flights from Maine to St. Louis (STL)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/2. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — STL
Aug 5 — Aug 121
Round-trip
1 adult, Economy
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Find cheap flights from Maine to St. Louis with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Maine to St. Louis
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Cheapest flights from Maine to St. LouisExplore the most affordable flight options available from Maine to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 6, 2026.
Explore the most affordable flight options available from Maine to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 6, 2026.
This American Airlines deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/145:40 pm
BGR
- STL
1 stop6h 57m
American Airlines
Mon 10/195:27 pm
STL
- BGR
1 stop5h 27m
American Airlines
Deal found 7/3![American Airlines logo]()
$304
This American Airlines deal was found by Cheapflights users on 7/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/46:30 am
BGR
- STL
1 stop5h 05m
American Airlines
Mon 8/109:15 am
STL
- BGR
1 stop7h 41m
American Airlines
Deal found 7/6![American Airlines logo]()
$319
This Delta deal was found by Cheapflights users on 7/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/45:20 am
BGR
- STL
1 stop7h 27m
Delta
Mon 8/1011:00 am
STL
- BGR
2 stops11h 40m
Delta
Deal found 7/6![Delta logo]()
$324
This American Airlines deal was found by Cheapflights users on 7/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/236:00 am
BOS
- STL
1 stop8h 16m
American Airlines
Wed 9/236:00 pm
STL
- BOS
Nonstop2h 47m
American Airlines
Deal found 7/4![American Airlines logo]()
$339
This Frontier deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/1611:52 am
BOS
- STL
1 stop6h 45m
Frontier
Sun 7/196:34 pm
STL
- BOS
1 stop12h 12m
Frontier
Deal found 7/3![Frontier logo]()
$340
This Frontier deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/2811:52 am
BOS
- STL
1 stop6h 45m
Frontier
Tue 8/46:34 pm
STL
- BOS
1 stop12h 12m
Frontier
Deal found 7/3![Frontier logo]()
$341
This Frontier deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/89:15 am
BOS
- STL
1 stop11h 24m
Frontier
Sat 10/178:34 pm
STL
- BOS
1 stop10h 46m
Frontier
Deal found 7/2![Frontier logo]()
$342
This Kiwi.com deal was found by Cheapflights users on 7/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/1910:04 am
BOS
- STL
1 stop14h 55m
Frontier
Fri 7/244:57 pm
STL
- BOS
1 stop13h 45m
Frontier
Deal found 7/4![Frontier logo]()
$344
This Kiwi.com deal was found by Cheapflights users on 7/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/1311:59 am
BOS
- STL
1 stop6h 38m
Frontier
Mon 8/178:08 pm
STL
- BOS
2 stops14h 39m
Frontier
Deal found 7/5![Frontier logo]()
$345
This Frontier deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/1310:11 am
BOS
- STL
1 stop10h 28m
Frontier
Sun 11/158:34 pm
STL
- BOS
1 stop11h 42m
Frontier
Deal found 7/3![Frontier logo]()
$346
This deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/136:50 am
BOS
- STL
1 stop5h 56m
Delta
Mon 8/176:05 am
STL
- BOS
1 stop6h 16m
Delta
Deal found 7/2![Delta logo]()
$347
This Kiwi.com deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/1611:59 am
BOS
- STL
1 stop21h 58m
Frontier
Fri 8/286:17 pm
STL
- BOS
1 stop16h 30m
Frontier
Deal found 7/3![Frontier logo]()
$348
Best flights from Maine to St. LouisDiscover carefully curated flight deals from Maine to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 6, 2026.
Discover carefully curated flight deals from Maine to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 6, 2026.
This Delta deal was found by Cheapflights users on 7/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/45:20 am
BGR
- STL
1 stop7h 27m
Delta
Mon 8/1011:00 am
STL
- BGR
2 stops11h 40m
Delta
Deal found 7/6![Delta logo]()
$324
This Southwest deal was found by Cheapflights users on 7/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/75:25 am
BOS
- STL
Nonstop3h 00m
Southwest
Sun 10/182:20 pm
STL
- BOS
Nonstop2h 35m
Southwest
Deal found 7/6![Southwest logo]()
$366
This United Airlines deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/175:15 am
PWM
- STL
2 stops7h 42m
United Airlines
Sun 9/208:00 am
STL
- PWM
1 stop5h 34m
United Airlines
Deal found 7/1![United Airlines logo]()
$406
This American Airlines deal was found by Cheapflights users on 7/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/85:50 pm
BGR
- STL
1 stop7h 08m
American Airlines
Tue 10/135:08 pm
STL
- BGR
1 stop5h 51m
American Airlines
Deal found 7/5![American Airlines logo]()
$491
This Delta deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/65:20 am
BGR
- STL
1 stop7h 27m
Delta
Thu 8/139:25 am
STL
- BGR
1 stop5h 55m
Delta
Deal found 7/3![Delta logo]()
$389
This Southwest deal was found by Cheapflights users on 7/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/45:35 am
BOS
- STL
Nonstop2h 50m
Southwest
Tue 8/114:45 pm
STL
- BOS
1 stop4h 25m
Southwest
Deal found 7/6![Southwest logo]()
$404
This United Airlines deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/16:00 am
PWM
- STL
1 stop7h 02m
United Airlines
Wed 9/28:00 am
STL
- PWM
1 stop5h 34m
United Airlines
Deal found 7/2![United Airlines logo]()
$423
This Delta deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/145:19 am
BGR
- STL
1 stop7h 29m
Delta
Mon 10/196:00 am
STL
- BGR
2 stops8h 30m
Delta
Deal found 7/3![Delta logo]()
$394
This Southwest deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/35:00 am
BOS
- STL
Nonstop2h 50m
Southwest
Mon 9/73:45 pm
STL
- BOS
1 stop5h 35m
Southwest
Deal found 7/2![Southwest logo]()
$404
This United Airlines deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/97:17 pm
BGR
- STL
1 stop5h 21m
United Airlines
Sat 9/128:00 am
STL
- BGR
1 stop12h 47m
United Airlines
Deal found 7/2![United Airlines logo]()
$423
This Delta deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/299:05 am
BOS
- STL
1 stop6h 43m
Delta
Mon 8/36:00 am
STL
- BOS
1 stop5h 45m
Delta
Deal found 7/2![Delta logo]()
$395
This Southwest deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/69:40 am
BOS
- STL
2 stops6h 30m
Southwest
Mon 8/102:45 pm
STL
- BOS
2 stops6h 25m
Southwest
Deal found 7/3![Southwest logo]()
$424
This Delta deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/234:45 pm
PWM
- STL
1 stop4h 56m
Delta
Mon 10/265:28 pm
STL
- PWM
1 stop5h 08m
Delta
Deal found 7/2![Delta logo]()
$401
This United Airlines deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/285:15 am
PWM
- STL
2 stops7h 56m
United Airlines
Sun 8/26:01 am
STL
- PWM
1 stop6h 24m
United Airlines
Deal found 7/2![United Airlines logo]()
$475
This Southwest deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/175:55 am
PWM
- STL
2 stops10h 15m
Southwest
Sun 9/2012:55 pm
STL
- PWM
2 stops9h 00m
Southwest
Deal found 7/1![Southwest logo]()
$437
This Delta deal was found by Cheapflights users on 7/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/56:00 am
PWM
- STL
1 stop5h 51m
Delta
Wed 11/116:45 am
STL
- PWM
1 stop4h 08m
Delta
Deal found 7/4![Delta logo]()
$427
This Southwest deal was found by Cheapflights users on 7/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/51:40 pm
PWM
- STL
2 stops8h 20m
Southwest
Wed 11/116:20 am
STL
- PWM
2 stops7h 30m
Southwest
Deal found 7/4![Southwest logo]()
$437
This United Airlines deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/237:58 am
PWM
- STL
1 stop7h 19m
United Airlines
Mon 10/261:08 pm
STL
- PWM
2 stops9h 15m
United Airlines
Deal found 7/2![United Airlines logo]()
$496
This Southwest deal was found by Cheapflights users on 7/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/1412:55 pm
BOS
- STL
1 stop5h 45m
Southwest
Wed 10/2110:25 am
STL
- BOS
Nonstop2h 40m
Southwest
Deal found 7/4![Southwest logo]()
$441
This Southwest deal was found by Cheapflights users on 7/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/410:50 am
BOS
- STL
2 stops8h 05m
Southwest
Tue 8/256:40 pm
STL
- BOS
Nonstop2h 35m
Southwest
Deal found 7/4![Southwest logo]()
$446
This Southwest deal was found by Cheapflights users on 7/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/35:50 pm
BOS
- STL
Nonstop2h 55m
Southwest
Sun 9/612:45 pm
STL
- BOS
Nonstop2h 35m
Southwest
Deal found 7/6![Southwest logo]()
$446
This Southwest deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/305:35 am
PWM
- STL
2 stops13h 55m
Southwest
Sun 8/25:10 pm
STL
- PWM
1 stop6h 00m
Southwest
Deal found 7/3![Southwest logo]()
$448
This Southwest deal was found by Cheapflights users on 7/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/15:50 am
BOS
- STL
1 stop7h 25m
Southwest
Mon 10/57:55 pm
STL
- BOS
Nonstop2h 35m
Southwest
Deal found 7/5![Southwest logo]()
$471
Last-minute flights from Maine to St. LouisDiscover last-minute flight deals from Maine to St. Louis. Data last updated July 6, 2026 and is based on user searches.
Discover last-minute flight deals from Maine to St. Louis. Data last updated July 6, 2026 and is based on user searches.
This Gotogate deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/710:04 am
BOS
- STL
1 stop14h 55m
Frontier
Tue 7/144:09 pm
STL
- BOS
1 stop16h 00m
Frontier
Deal found 7/3![Frontier logo]()
$351
This Frontier deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/1611:52 am
BOS
- STL
1 stop6h 45m
Frontier
Sun 7/196:34 pm
STL
- BOS
1 stop12h 12m
Frontier
Deal found 7/3![Frontier logo]()
$340
This Booking.com deal was found by Cheapflights users on 7/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/1710:04 am
BOS
- STL
1 stop14h 55m
Frontier
Sun 7/194:09 pm
STL
- BOS
1 stop16h 00m
Frontier
Deal found 7/4![Frontier logo]()
$353
This Kiwi.com deal was found by Cheapflights users on 7/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/1910:04 am
BOS
- STL
1 stop14h 55m
Frontier
Fri 7/244:57 pm
STL
- BOS
1 stop13h 45m
Frontier
Deal found 7/4![Frontier logo]()
$344
This Kiwi.com deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/2311:52 am
BOS
- STL
1 stop6h 45m
Frontier
Sun 7/266:34 pm
STL
- BOS
2 stops15h 30m
Frontier
Deal found 7/1![Frontier logo]()
$349
This Frontier deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/2811:52 am
BOS
- STL
1 stop6h 45m
Frontier
Tue 8/46:34 pm
STL
- BOS
1 stop12h 12m
Frontier
Deal found 7/3![Frontier logo]()
$341
This American Airlines deal was found by Cheapflights users on 7/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/46:30 am
BGR
- STL
1 stop5h 05m
American Airlines
Mon 8/109:15 am
STL
- BGR
1 stop7h 41m
American Airlines
Deal found 7/6![American Airlines logo]()
$319
This Delta deal was found by Cheapflights users on 7/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/45:20 am
BGR
- STL
1 stop7h 27m
Delta
Mon 8/1011:00 am
STL
- BGR
2 stops11h 40m
Delta
Deal found 7/6![Delta logo]()
$324
This Kiwi.com deal was found by Cheapflights users on 7/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/411:52 am
BOS
- STL
1 stop6h 45m
Frontier
Tue 8/256:45 pm
STL
- BOS
2 stops16h 02m
Frontier
Deal found 7/4![Frontier logo]()
$346
This Kiwi.com deal was found by Cheapflights users on 7/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/1311:59 am
BOS
- STL
2 stops13h 00m
Frontier
Fri 8/144:57 pm
STL
- BOS
1 stop13h 45m
Frontier
Deal found 7/5![Frontier logo]()
$345
This deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/136:50 am
BOS
- STL
1 stop5h 56m
Delta
Mon 8/176:05 am
STL
- BOS
1 stop6h 16m
Delta
Deal found 7/2![Delta logo]()
$347
This Kiwi.com deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/1611:59 am
BOS
- STL
1 stop21h 58m
Frontier
Fri 8/286:17 pm
STL
- BOS
1 stop16h 30m
Frontier
Deal found 7/3![Frontier logo]()
$348
One-way flights from Maine to St. LouisSearch for one-way flight options from Maine to St. Louis. Find affordable one-way fares based on user searches. Data last updated July 6, 2026.
Search for one-way flight options from Maine to St. Louis. Find affordable one-way fares based on user searches. Data last updated July 6, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/212:45 pm
BOS
- STL
1 stop29h 37m
Frontier
Deal found 7/2![Frontier logo]()
$112
This Kiwi.com deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/161:00 pm
BOS
- STL
1 stop21h 40m
Frontier
Deal found 7/3![Frontier logo]()
$113
This Mytrip deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1210:04 am
BOS
- STL
1 stop14h 55m
Frontier
Deal found 7/2![Frontier logo]()
$116
This Kiwi.com deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/410:04 am
BOS
- STL
1 stop14h 55m
Frontier
Deal found 7/3![Frontier logo]()
$119
This Super.com deal was found by Cheapflights users on 7/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/2810:04 am
BOS
- STL
1 stop14h 55m
Frontier
Deal found 7/6![Frontier logo]()
$120
This Kiwi.com deal was found by Cheapflights users on 7/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2212:45 pm
BOS
- STL
1 stop29h 37m
Frontier
Deal found 7/5![Frontier logo]()
$121
This Kiwi.com deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/319:36 am
BOS
- STL
1 stop8h 46m
Frontier
Deal found 7/3![Frontier logo]()
$122
This Priceline deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/111:05 am
BOS
- STL
1 stop9h 34m
Frontier
Deal found 7/3![Frontier logo]()
$129
This Super.com deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/2511:05 am
BOS
- STL
1 stop9h 34m
Frontier
Deal found 7/3![Frontier logo]()
$133
This Frontier deal was found by Cheapflights users on 7/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/39:36 am
BOS
- STL
1 stop8h 46m
Frontier
Deal found 7/3![Frontier logo]()
$134
This Frontier deal was found by Cheapflights users on 7/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/211:05 am
BOS
- STL
1 stop9h 34m
Frontier
Deal found 7/2![Frontier logo]()
$135
This Kiwi.com deal was found by Cheapflights users on 7/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/247:00 am
PWM
- STL
2 stops11h 22m
Multiple Airlines
Deal found 7/6![Multiple Airlines logo]()
$158
Find flight deals from Maine to St. Louis
Keep the following information in mind while searching for Maine to St. Louis flight deals. Data was last updated July 6, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $304 (American Airlines) |
One-way from | $112 (Kiwi.com) |
Popular in | April |
Cheapest in | September |
Average price | $552 |
Cheapflights Fare Finder
Customize your flight search to find flights from Maine to St. Louis that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 6, 2026.
Use the filters below to find and compare flights from Maine to St. Louis that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
BangorSt. Louis
BGR - STL
BGRSTL
Bangor
Tue 8/4
5:20 am-11:47 am
1 stop7h 27m
Lambert-St Louis
Mon 8/10
11:00 am-11:40 pm
2 stops11h 40m
$324
BostonSt. Louis
BOS - STL
BOSSTL
Boston Logan Intl
Wed 10/7
5:25 am-7:25 am
Nonstop3h 00m
Lambert-St Louis
Sun 10/18
2:20 pm-5:55 pm
Nonstop2h 35m
$366
BangorSt. Louis
BGR - STL
BGRSTL
Bangor
Thu 8/6
5:20 am-11:47 am
1 stop7h 27m
Lambert-St Louis
Thu 8/13
9:25 am-4:20 pm
1 stop5h 55m
$389
BangorSt. Louis
BGR - STL
BGRSTL
Bangor
Wed 10/14
5:19 am-11:48 am
1 stop7h 29m
Lambert-St Louis
Mon 10/19
6:00 am-3:30 pm
2 stops8h 30m
$394
BostonSt. Louis
BOS - STL
BOSSTL
Boston Logan Intl
Wed 7/29
9:05 am-2:48 pm
1 stop6h 43m
Lambert-St Louis
Mon 8/3
6:00 am-12:45 pm
1 stop5h 45m
$395
PortlandSt. Louis
PWM - STL
PWMSTL
Portland
Fri 10/23
4:45 pm-8:41 pm
1 stop4h 56m
Lambert-St Louis
Mon 10/26
5:28 pm-11:36 pm
1 stop5h 08m
$401
BostonSt. Louis
BOS - STL
BOSSTL
Boston Logan Intl
Tue 8/4
5:35 am-7:25 am
Nonstop2h 50m
Lambert-St Louis
Tue 8/11
4:45 pm-10:10 pm
1 stop4h 25m
$404
BostonSt. Louis
BOS - STL
BOSSTL
Boston Logan Intl
Thu 9/3
5:00 am-6:50 am
Nonstop2h 50m
Lambert-St Louis
Mon 9/7
3:45 pm-10:20 pm
1 stop5h 35m
$404
PortlandSt. Louis
PWM - STL
PWMSTL
Portland
Thu 9/17
5:15 am-11:57 am
2 stops7h 42m
Lambert-St Louis
Sun 9/20
8:00 am-2:34 pm
1 stop5h 34m
$406
PortlandSt. Louis
PWM - STL
PWMSTL
Portland
Tue 9/1
6:00 am-12:02 pm
1 stop7h 02m
Lambert-St Louis
Wed 9/2
8:00 am-2:34 pm
1 stop5h 34m
$423
Showing 1-10 of 48 resultsSorted by cheapest first
Best time to book a flight from Maine to St. Louis
Have a flexible travel schedule? Discover the best time to fly to St. Louis from Maine with our price prediction graph.
BOS-STL
PWM-STL
BGR-STL
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Maine to St. Louis
USME-STL
BOS-STL
PWM-STL
BGR-STL
What is the cheapest month to book a flight from Maine to St. Louis?
Currently, September is the cheapest month in which you can book a flight from Maine to St. Louis (average of $182). Flying from Maine to St. Louis in January is currently the most expensive (average of $334). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
How much does it cost to fly round-trip from Maine to St. Louis?
Related info for your journey
Find useful and relevant information for your journey from Maine to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near St. Louis?
Book flights to St. Louis if you plan to visit one of these locationsEdwardsville
O'Fallon
Fenton
Swansea
Fairview Heights
Eureka
Maryland Heights
Collinsville
Wentzville
Glencoe
Chesterfield
Alton
Farmington
Browse thousands of different options on Cheapflights for your next trip
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St. Louis flight routes
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Alternative routes for Maine to St. Louis
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to St. Louis by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Maine to St. Louis by cabin class
Find flights from Maine to St. Louis, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Maine and St. Louis flights
Browse other Maine and St. Louis flight options. Last updated on July 6, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to St. Louis
Explore flights to St. Louis departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on July 6, 2026.
Maine to St. Louis flights
Consider these flights traveling from Maine to St. Louis.
Top 4 airlines flying from Maine to St. Louis
Discover the top 4 airlines that operate flights from Maine to St. Louis. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 6, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$254 | Average$305 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$268 | Average$388 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$275 | Average$428 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$348 | Average$549 | FlexibilityNo cancel fee | On-time63% |