$70+ 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 2/28. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — STL
Mar 5 — Mar 121
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 February 3, 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 February 3, 2026.
This American Airlines deal was found by Cheapflights users on 2/3. 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.
Thu 4/97:07 am
PWM
- STL
1 stop5h 38m
American Airlines
Tue 4/144:30 pm
STL
- PWM
1 stop6h 43m
American Airlines
Deal found 2/3![American Airlines logo]()
$317
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
Fri 4/244:09 pm
BOS
- STL
2 stops15h 41m
Multiple Airlines
Sun 4/2611:21 am
STL
- BOS
1 stop23h 24m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$319
This Kiwi.com deal was found by Cheapflights users on 2/1. 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.
Tue 3/36:00 am
BOS
- STL
1 stop25h 51m
Multiple Airlines
Sat 3/77:47 am
STL
- BOS
1 stop6h 59m
Multiple Airlines
Deal found 2/1![Multiple Airlines logo]()
$320
This Kiwi.com deal was found by Cheapflights users on 2/1. 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.
Fri 4/1712:35 pm
BOS
- STL
1 stop19h 15m
Multiple Airlines
Mon 4/208:13 pm
STL
- BOS
2 stops26h 46m
Multiple Airlines
Deal found 2/1![Multiple Airlines logo]()
$322
This American Airlines deal was found by Cheapflights users on 2/1. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/169:00 am
BOS
- STL
Nonstop3h 13m
American Airlines
Wed 5/206:07 pm
STL
- BOS
Nonstop2h 41m
American Airlines
Deal found 2/1![American Airlines logo]()
$323
This Kiwi.com deal was found by Cheapflights users on 2/1. 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.
Fri 3/66:00 am
BOS
- STL
1 stop6h 49m
Multiple Airlines
Sat 3/77:47 am
STL
- BOS
1 stop6h 59m
Multiple Airlines
Deal found 2/1![Multiple Airlines logo]()
$325
This Southwest deal was found by Cheapflights users on 2/1. 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.
Sat 3/145:35 am
BOS
- STL
Nonstop3h 05m
Southwest
Sat 3/147:40 pm
STL
- BOS
Nonstop2h 25m
Southwest
Deal found 2/1![Southwest logo]()
$326
This Kiwi.com deal was found by Cheapflights users on 2/1. 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.
Fri 5/154:09 pm
BOS
- STL
2 stops15h 41m
Multiple Airlines
Sun 5/1711:21 am
STL
- BOS
1 stop12h 30m
Multiple Airlines
Deal found 2/1![Multiple Airlines logo]()
$330
This Kiwi.com deal was found by Cheapflights users on 2/1. 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.
Sun 3/294:23 pm
BOS
- STL
1 stop15h 39m
Multiple Airlines
Mon 3/304:51 pm
STL
- BOS
1 stop23h 03m
Multiple Airlines
Deal found 2/1![Multiple Airlines logo]()
$333
This Southwest deal was found by Cheapflights users on 2/1. 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.
Tue 4/145:55 pm
BOS
- STL
Nonstop3h 05m
Southwest
Sat 4/186:55 pm
STL
- BOS
Nonstop2h 30m
Southwest
Deal found 2/1![Southwest logo]()
$337
This United Airlines deal was found by Cheapflights users on 2/1. 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.
Sat 2/214:15 pm
PWM
- STL
1 stop5h 50m
United Airlines
Mon 2/235:41 pm
STL
- PWM
1 stop4h 39m
United Airlines
Deal found 2/1![United Airlines logo]()
$339
This American Airlines deal was found by Cheapflights users on 2/1. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/148:41 am
BOS
- STL
Nonstop3h 13m
American Airlines
Sat 4/185:21 pm
STL
- BOS
1 stop6h 02m
American Airlines
Deal found 2/1![American Airlines logo]()
$339
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 February 3, 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 February 3, 2026.
This American Airlines deal was found by Cheapflights users on 2/3. 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.
Thu 4/97:07 am
PWM
- STL
1 stop5h 38m
American Airlines
Tue 4/144:30 pm
STL
- PWM
1 stop6h 43m
American Airlines
Deal found 2/3![American Airlines logo]()
$317
This United Airlines deal was found by Cheapflights users on 2/1. 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.
Sat 2/214:15 pm
PWM
- STL
1 stop5h 50m
United Airlines
Mon 2/235:41 pm
STL
- PWM
1 stop4h 39m
United Airlines
Deal found 2/1![United Airlines logo]()
$339
This Southwest deal was found by Cheapflights users on 2/1. 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.
Tue 2/246:25 am
BOS
- STL
Nonstop3h 20m
Southwest
Wed 3/45:55 pm
STL
- BOS
Nonstop2h 30m
Southwest
Deal found 2/1![Southwest logo]()
$351
This Delta deal was found by Cheapflights users on 2/1. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/154:42 pm
PWM
- STL
2 stops7h 32m
Delta
Mon 4/206:48 am
STL
- PWM
2 stops8h 57m
Delta
Deal found 2/1![Delta logo]()
$377
This American Airlines deal was found by Cheapflights users on 2/2. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/157:07 am
PWM
- STL
1 stop5h 38m
American Airlines
Mon 4/205:21 pm
STL
- PWM
1 stop5h 06m
American Airlines
Deal found 2/2![American Airlines logo]()
$317
This Southwest deal was found by Cheapflights users on 1/31. 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.
Sat 5/1612:40 pm
BOS
- STL
2 stops8h 05m
Southwest
Tue 5/192:30 pm
STL
- BOS
2 stops7h 10m
Southwest
Deal found 1/31![Southwest logo]()
$367
This American Airlines deal was found by Cheapflights users on 2/2. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/105:51 pm
PWM
- STL
1 stop15h 33m
American Airlines
Mon 4/135:21 pm
STL
- PWM
1 stop5h 06m
American Airlines
Deal found 2/2![American Airlines logo]()
$352
This United Airlines deal was found by Cheapflights users on 1/31. 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 5/14:45 pm
PWM
- STL
1 stop6h 07m
United Airlines
Sun 5/37:45 am
STL
- PWM
1 stop5h 29m
United Airlines
Deal found 1/31![United Airlines logo]()
$407
This Delta deal was found by Cheapflights users on 2/1. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/55:23 am
PWM
- STL
1 stop6h 46m
Delta
Fri 4/174:41 pm
STL
- PWM
1 stop5h 42m
Delta
Deal found 2/1![Delta logo]()
$407
This Southwest deal was found by Cheapflights users on 2/1. 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 4/93:45 pm
BOS
- STL
1 stop8h 00m
Southwest
Mon 4/1310:15 am
STL
- BOS
Nonstop2h 35m
Southwest
Deal found 2/1![Southwest logo]()
$381
This American Airlines deal was found by Cheapflights users on 2/2. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/73:10 pm
BOS
- STL
Nonstop3h 12m
American Airlines
Thu 4/96:07 pm
STL
- BOS
Nonstop2h 41m
American Airlines
Deal found 2/2![American Airlines logo]()
$354
This Southwest deal was found by Cheapflights users on 2/2. 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.
Sat 5/1612:50 pm
BOS
- STL
2 stops8h 10m
Southwest
Wed 5/202:30 pm
STL
- BOS
2 stops7h 10m
Southwest
Deal found 2/2![Southwest logo]()
$384
This American Airlines deal was found by Cheapflights users on 2/3. 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.
Thu 5/143:10 pm
BOS
- STL
Nonstop3h 12m
American Airlines
Sat 5/1612:25 pm
STL
- BOS
1 stop7h 47m
American Airlines
Deal found 2/3![American Airlines logo]()
$381
This Southwest deal was found by Cheapflights users on 2/1. 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.
Tue 3/315:30 am
BOS
- STL
Nonstop3h 05m
Southwest
Tue 4/76:50 pm
STL
- BOS
Nonstop2h 30m
Southwest
Deal found 2/1![Southwest logo]()
$389
This United Airlines deal was found by Cheapflights users on 2/1. 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.
Tue 6/236:10 am
BGR
- STL
2 stops10h 36m
United Airlines
Sun 6/281:13 pm
STL
- BGR
1 stop7h 43m
United Airlines
Deal found 2/1![United Airlines logo]()
$487
This Southwest deal was found by Cheapflights users on 2/1. 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.
Mon 4/203:45 pm
BOS
- STL
1 stop8h 00m
Southwest
Thu 4/235:40 am
STL
- BOS
1 stop4h 15m
Southwest
Deal found 2/1![Southwest logo]()
$391
This American Airlines deal was found by Cheapflights users on 2/1. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/235:30 am
BGR
- STL
1 stop6h 09m
American Airlines
Sun 6/289:22 am
STL
- BGR
1 stop6h 11m
American Airlines
Deal found 2/1![American Airlines logo]()
$435
This Southwest deal was found by Cheapflights users on 1/31. 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 3/105:25 pm
BOS
- STL
Nonstop3h 10m
Southwest
Sat 3/147:40 pm
STL
- BOS
Nonstop2h 25m
Southwest
Deal found 1/31![Southwest logo]()
$400
This Southwest deal was found by Cheapflights users on 2/1. 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.
Sat 3/215:35 am
BOS
- STL
Nonstop3h 05m
Southwest
Sun 3/297:40 pm
STL
- BOS
Nonstop2h 25m
Southwest
Deal found 2/1![Southwest logo]()
$400
This Southwest deal was found by Cheapflights users on 2/2. 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 7/233:55 pm
BOS
- STL
2 stops6h 05m
Southwest
Sat 7/254:45 pm
STL
- BOS
Nonstop2h 35m
Southwest
Deal found 2/2![Southwest logo]()
$403
This United Airlines deal was found by Cheapflights users on 2/2. 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 7/177:15 pm
BGR
- STL
1 stop5h 12m
United Airlines
Sun 7/191:13 pm
STL
- BGR
2 stops8h 59m
United Airlines
Deal found 2/2![United Airlines logo]()
$672
This American Airlines deal was found by Cheapflights users on 2/2. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/175:00 am
BGR
- STL
1 stop6h 01m
American Airlines
Sun 7/196:03 am
STL
- BGR
1 stop4h 42m
American Airlines
Deal found 2/2![American Airlines logo]()
$540
This Southwest deal was found by Cheapflights users on 2/1. 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.
Sat 3/75:20 pm
PWM
- STL
1 stop7h 15m
Southwest
Wed 3/116:15 am
STL
- PWM
1 stop4h 40m
Southwest
Deal found 2/1![Southwest logo]()
$407
This Delta deal was found by Cheapflights users on 2/2. 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.
Tue 2/175:06 am
BGR
- STL
1 stop8h 17m
Delta
Sat 2/216:35 am
STL
- BGR
2 stops8h 47m
Delta
Deal found 2/2![Delta logo]()
$810
This American Airlines deal was found by Cheapflights users on 2/2. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/174:25 pm
BGR
- STL
1 stop6h 12m
American Airlines
Sat 2/216:13 am
STL
- BGR
1 stop5h 04m
American Airlines
Deal found 2/2![American Airlines logo]()
$641
This American Airlines deal was found by Cheapflights users on 2/3. 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.
Tue 3/245:21 am
BGR
- STL
2 stops9h 46m
American Airlines
Tue 3/243:33 pm
STL
- BGR
2 stops7h 20m
American Airlines
Deal found 2/3![American Airlines logo]()
$712
This United Airlines deal was found by Cheapflights users on 2/2. 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.
Sun 3/1511:12 am
BGR
- STL
1 stop6h 48m
United Airlines
Sun 3/2211:28 am
STL
- BGR
1 stop6h 20m
United Airlines
Deal found 2/2![United Airlines logo]()
$1,360
Last-minute flights from Maine to St. LouisDiscover last-minute flight deals from Maine to St. Louis. Data last updated February 3, 2026 and is based on user searches.
Discover last-minute flight deals from Maine to St. Louis. Data last updated February 3, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 2/1. 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.
Sun 2/156:00 am
BOS
- STL
1 stop25h 51m
Frontier
Wed 2/183:49 pm
STL
- BOS
2 stops16h 30m
Frontier
Deal found 2/1![Frontier logo]()
$350
This Kiwi.com deal was found by Cheapflights users on 2/1. 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.
Tue 2/176:00 am
BOS
- STL
1 stop25h 51m
Frontier
Sun 2/223:49 pm
STL
- BOS
2 stops32h 24m
Frontier
Deal found 2/1![Frontier logo]()
$344
This Kiwi.com deal was found by Cheapflights users on 2/1. 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.
Wed 2/1812:42 pm
BOS
- STL
1 stop10h 45m
Multiple Airlines
Fri 2/208:20 pm
STL
- BOS
1 stop27h 09m
Multiple Airlines
Deal found 2/1![Multiple Airlines logo]()
$323
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
Thu 2/196:00 am
BOS
- STL
1 stop25h 51m
Frontier
Fri 2/208:20 pm
STL
- BOS
1 stop27h 09m
Frontier
Deal found 2/2![Frontier logo]()
$354
This United Airlines deal was found by Cheapflights users on 2/1. 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.
Sat 2/214:15 pm
PWM
- STL
1 stop5h 50m
United Airlines
Mon 2/235:41 pm
STL
- PWM
1 stop4h 39m
United Airlines
Deal found 2/1![United Airlines logo]()
$339
This Southwest deal was found by Cheapflights users on 2/1. 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.
Tue 2/246:25 am
BOS
- STL
Nonstop3h 20m
Southwest
Wed 3/45:55 pm
STL
- BOS
Nonstop2h 30m
Southwest
Deal found 2/1![Southwest logo]()
$351
This Kiwi.com deal was found by Cheapflights users on 2/1. 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.
Tue 3/36:00 am
BOS
- STL
1 stop25h 51m
Multiple Airlines
Sat 3/77:47 am
STL
- BOS
1 stop6h 59m
Multiple Airlines
Deal found 2/1![Multiple Airlines logo]()
$320
This Kiwi.com deal was found by Cheapflights users on 2/1. 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.
Fri 3/66:00 am
BOS
- STL
1 stop6h 49m
Multiple Airlines
Sat 3/77:47 am
STL
- BOS
1 stop6h 59m
Multiple Airlines
Deal found 2/1![Multiple Airlines logo]()
$325
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
Sun 3/812:50 pm
BOS
- STL
1 stop25h 29m
Multiple Airlines
Thu 3/128:02 am
STL
- BOS
1 stop12h 31m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$349
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
Mon 3/94:22 pm
BOS
- STL
1 stop7h 57m
Multiple Airlines
Thu 3/129:05 pm
STL
- BOS
2 stops13h 36m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$356
This Southwest deal was found by Cheapflights users on 2/1. 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.
Sat 3/145:35 am
BOS
- STL
Nonstop3h 05m
Southwest
Sat 3/147:40 pm
STL
- BOS
Nonstop2h 25m
Southwest
Deal found 2/1![Southwest logo]()
$326
This Kiwi.com deal was found by Cheapflights users on 2/1. 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.
Sun 3/294:23 pm
BOS
- STL
1 stop15h 39m
Multiple Airlines
Mon 3/304:51 pm
STL
- BOS
1 stop23h 03m
Multiple Airlines
Deal found 2/1![Multiple Airlines logo]()
$333
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 February 3, 2026.
Search for one-way flight options from Maine to St. Louis. Find affordable one-way fares based on user searches. Data last updated February 3, 2026.
This Frontier deal was found by Cheapflights users on 2/1. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/2811:45 am
BOS
- STL
1 stop13h 14m
Frontier
Deal found 2/1![Frontier logo]()
$70
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
Tue 3/34:22 pm
BOS
- STL
1 stop31h 05m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$78
This Frontier deal was found by Cheapflights users on 2/1. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/2611:45 am
BOS
- STL
1 stop13h 14m
Frontier
Deal found 2/1![Frontier logo]()
$80
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 3/412:43 pm
BOS
- STL
1 stop10h 44m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$85
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
Fri 2/276:00 am
BOS
- STL
1 stop25h 51m
Frontier
Deal found 2/2![Frontier logo]()
$90
This American Airlines deal was found by Cheapflights users on 2/1. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/712:20 pm
BOS
- STL
1 stop9h 52m
American Airlines
Deal found 2/1![American Airlines logo]()
$91
This Frontier deal was found by Cheapflights users on 1/31. 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.
Wed 4/2911:16 am
BOS
- STL
1 stop13h 03m
Frontier
Deal found 1/31![Frontier logo]()
$96
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
Thu 3/54:22 pm
BOS
- STL
1 stop8h 37m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$98
This Trip.com deal was found by Cheapflights users on 2/2. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/19:45 am
BOS
- STL
1 stop14h 40m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$100
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 3/256:01 am
BOS
- STL
2 stops29h 30m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$102
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 3/42:23 pm
BGR
- STL
2 stops34h 36m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$136
This American Airlines deal was found by Cheapflights users on 2/1. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/267:10 am
PWM
- STL
1 stop6h 33m
American Airlines
Deal found 2/1![American Airlines logo]()
$170
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 February 3, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $317 (American Airlines) |
One-way from | $70 (Frontier) |
Popular in | November |
Cheapest in | February |
Average price | $289 |
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 February 3, 2026.
Use the filters below to find and compare flights from Maine to St. Louis that are best for you.
Fly from
Maine
Fly to
St. Louis
Route
Depart
Return
Price
PortlandSt. Louis
PWM - STL
PWMSTL
Portland
Thu 4/9
7:07 am-11:45 am
1 stop5h 38m
Lambert-St Louis
Tue 4/14
4:30 pm-12:13 am
1 stop6h 43m
$317
PortlandSt. Louis
PWM - STL
PWMSTL
Portland
Wed 4/15
7:07 am-11:45 am
1 stop5h 38m
Lambert-St Louis
Mon 4/20
5:21 pm-11:27 pm
1 stop5h 06m
$317
PortlandSt. Louis
PWM - STL
PWMSTL
Portland
Sat 2/21
4:15 pm-9:05 pm
1 stop5h 50m
Lambert-St Louis
Mon 2/23
5:41 pm-11:20 pm
1 stop4h 39m
$339
BostonSt. Louis
BOS - STL
BOSSTL
Boston Logan Intl
Tue 2/24
6:25 am-8:45 am
Nonstop3h 20m
Lambert-St Louis
Wed 3/4
5:55 pm-9:25 pm
Nonstop2h 30m
$351
PortlandSt. Louis
PWM - STL
PWMSTL
Portland
Fri 4/10
5:51 pm-8:24 am
1 stop15h 33m
Lambert-St Louis
Mon 4/13
5:21 pm-11:27 pm
1 stop5h 06m
$352
BostonSt. Louis
BOS - STL
BOSSTL
Boston Logan Intl
Tue 4/7
3:10 pm-5:22 pm
Nonstop3h 12m
Lambert-St Louis
Thu 4/9
6:07 pm-9:48 pm
Nonstop2h 41m
$354
BostonSt. Louis
BOS - STL
BOSSTL
Boston Logan Intl
Sat 5/16
12:40 pm-7:45 pm
2 stops8h 05m
Lambert-St Louis
Tue 5/19
2:30 pm-10:40 pm
2 stops7h 10m
$367
PortlandSt. Louis
PWM - STL
PWMSTL
Portland
Wed 4/15
4:42 pm-11:14 pm
2 stops7h 32m
Lambert-St Louis
Mon 4/20
6:48 am-4:45 pm
2 stops8h 57m
$377
BostonSt. Louis
BOS - STL
BOSSTL
Boston Logan Intl
Thu 4/9
3:45 pm-10:45 pm
1 stop8h 00m
Lambert-St Louis
Mon 4/13
10:15 am-1:50 pm
Nonstop2h 35m
$381
BostonSt. Louis
BOS - STL
BOSSTL
Boston Logan Intl
Thu 5/14
3:10 pm-5:22 pm
Nonstop3h 12m
Lambert-St Louis
Sat 5/16
12:25 pm-9:12 pm
1 stop7h 47m
$381
Showing 1-10 of 51 results
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, October is the cheapest month in which you can book a flight from Maine to St. Louis (average of $161). Flying from Maine to St. Louis in November is currently the most expensive (average of $351). 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.
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
Swansea
Fairview Heights
Maryland Heights
Collinsville
Eureka
Glencoe
Chesterfield
Alton
Farmington
Festus
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
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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 February 3, 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 February 3, 2026.
Maine to St. Louis flights
Consider these flights traveling from Maine to St. Louis.
Top 3 airlines flying from Maine to St. Louis
Discover the top 3 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 February 3, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$158 | Average$382 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$258 | Average$458 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$341 | Average$456 | FlexibilityNo cancel fee | On-time69% |