$88+ 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 6/2. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — STL
Jun 22 — Jun 291
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
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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 May 23, 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 May 23, 2026.
This Kiwi.com deal was found by Cheapflights users on 5/20. 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 8/217:00 am
PWM
- STL
2 stops26h 52m
Multiple Airlines
Tue 8/254:10 pm
STL
- PWM
1 stop17h 17m
Multiple Airlines
Deal found 5/20![Multiple Airlines logo]()
$284
This Delta deal was found by Cheapflights users on 5/22. 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 7/33:45 pm
BGR
- STL
1 stop6h 01m
Delta
Wed 7/85:00 pm
STL
- BGR
1 stop5h 11m
Delta
Deal found 5/22![Delta logo]()
$288
This United Airlines deal was found by Cheapflights users on 5/20. 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 7/85:00 pm
PWM
- STL
1 stop5h 26m
United Airlines
Tue 7/141:13 pm
STL
- PWM
1 stop7h 28m
United Airlines
Deal found 5/20![United Airlines logo]()
$319
This Southwest deal was found by Cheapflights users on 5/20. 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 6/305:30 am
PWM
- STL
1 stop7h 00m
Southwest
Tue 7/73:15 pm
STL
- PWM
2 stops6h 40m
Southwest
Deal found 5/20![Southwest logo]()
$324
This United Airlines deal was found by Cheapflights users on 5/20. 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 6/307:12 pm
BGR
- STL
1 stop5h 24m
United Airlines
Sat 7/46:00 am
STL
- BGR
1 stop7h 10m
United Airlines
Deal found 5/20![United Airlines logo]()
$329
This American Airlines deal was found by Cheapflights users on 5/21. 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 6/612:56 pm
BGR
- STL
1 stop7h 23m
American Airlines
Wed 6/101:42 pm
STL
- BGR
1 stop8h 21m
American Airlines
Deal found 5/21![American Airlines logo]()
$333
This Kiwi.com deal was found by Cheapflights users on 5/19. 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 6/128:47 am
BOS
- STL
2 stops25h 05m
Frontier
Mon 6/155:06 pm
STL
- BOS
1 stop7h 21m
Frontier
Deal found 5/19![Frontier logo]()
$344
This American Airlines deal was found by Cheapflights users on 5/20. 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 8/185:24 pm
BOS
- STL
Nonstop3h 08m
American Airlines
Sat 8/227:38 pm
STL
- BOS
Nonstop2h 44m
American Airlines
Deal found 5/20![American Airlines logo]()
$345
This Kiwi.com deal was found by Cheapflights users on 5/20. 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 6/512:01 pm
BOS
- STL
1 stop21h 54m
Frontier
Mon 6/85:27 pm
STL
- BOS
1 stop13h 25m
Frontier
Deal found 5/20![Frontier logo]()
$346
This Southwest deal was found by Cheapflights users on 5/18. 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 6/176:25 pm
BOS
- STL
Nonstop3h 05m
Southwest
Wed 6/243:10 pm
STL
- BOS
1 stop7h 20m
Southwest
Deal found 5/18![Southwest logo]()
$347
This Kiwi.com deal was found by Cheapflights users on 5/20. 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 6/178:47 am
BOS
- STL
2 stops16h 02m
Frontier
Wed 6/245:06 pm
STL
- BOS
1 stop7h 21m
Frontier
Deal found 5/20![Frontier logo]()
$348
This Frontier deal was found by Cheapflights users on 5/20. 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.
Sun 6/146:00 am
BOS
- STL
1 stop12h 30m
Frontier
Sat 6/205:06 pm
STL
- BOS
1 stop7h 21m
Frontier
Deal found 5/20![Frontier logo]()
$350
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 May 23, 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 May 23, 2026.
This Delta deal was found by Cheapflights users on 5/18. 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 7/33:45 pm
BGR
- STL
1 stop6h 01m
Delta
Wed 7/85:00 pm
STL
- BGR
1 stop5h 11m
Delta
Deal found 5/18![Delta logo]()
$317
This Southwest deal was found by Cheapflights users on 5/20. 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 6/305:30 am
PWM
- STL
1 stop7h 00m
Southwest
Tue 7/73:15 pm
STL
- PWM
2 stops6h 40m
Southwest
Deal found 5/20![Southwest logo]()
$324
This United Airlines deal was found by Cheapflights users on 5/17. 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 10/249:15 am
BGR
- STL
1 stop7h 28m
United Airlines
Wed 10/288:00 am
STL
- BGR
1 stop5h 10m
United Airlines
Deal found 5/17![United Airlines logo]()
$417
This Southwest deal was found by Cheapflights users on 5/22. 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 6/25:45 am
BOS
- STL
Nonstop3h 00m
Southwest
Fri 6/54:35 pm
STL
- BOS
2 stops6h 30m
Southwest
Deal found 5/22![Southwest logo]()
$347
This Delta deal was found by Cheapflights users on 5/21. 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.
Mon 6/155:30 am
BOS
- STL
1 stop5h 07m
Delta
Sat 6/206:10 pm
STL
- BOS
1 stop4h 44m
Delta
Deal found 5/21![Delta logo]()
$352
This Southwest deal was found by Cheapflights users on 5/18. 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 6/176:25 pm
BOS
- STL
Nonstop3h 05m
Southwest
Wed 6/243:10 pm
STL
- BOS
1 stop7h 20m
Southwest
Deal found 5/18![Southwest logo]()
$347
This Delta deal was found by Cheapflights users on 5/22. 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 8/283:00 pm
BOS
- STL
1 stop6h 31m
Delta
Tue 9/15:45 pm
STL
- BOS
1 stop4h 47m
Delta
Deal found 5/22![Delta logo]()
$352
This United Airlines deal was found by Cheapflights users on 5/21. 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 6/306:02 am
BGR
- STL
3 stops31h 09m
United Airlines
Sat 7/46:00 am
STL
- BGR
1 stop7h 10m
United Airlines
Deal found 5/21![United Airlines logo]()
$420
This Delta deal was found by Cheapflights users on 5/22. 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 6/55:40 am
BOS
- STL
1 stop4h 49m
Delta
Tue 6/97:12 pm
STL
- BOS
1 stop5h 19m
Delta
Deal found 5/22![Delta logo]()
$352
This Southwest deal was found by Cheapflights users on 5/21. 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 7/225:50 am
BOS
- STL
Nonstop2h 55m
Southwest
Sun 7/268:00 pm
STL
- BOS
Nonstop2h 30m
Southwest
Deal found 5/21![Southwest logo]()
$354
This Southwest deal was found by Cheapflights users on 5/22. 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 7/285:50 am
BOS
- STL
Nonstop2h 55m
Southwest
Mon 8/37:55 pm
STL
- BOS
Nonstop2h 35m
Southwest
Deal found 5/22![Southwest logo]()
$354
This Delta deal was found by Cheapflights users on 5/22. 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 6/55:40 am
BOS
- STL
1 stop4h 49m
Delta
Mon 6/87:12 pm
STL
- BOS
1 stop5h 19m
Delta
Deal found 5/22![Delta logo]()
$391
This Southwest deal was found by Cheapflights users on 5/20. 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 7/87:10 pm
PWM
- STL
1 stop4h 50m
Southwest
Tue 7/143:15 pm
STL
- PWM
2 stops6h 40m
Southwest
Deal found 5/20![Southwest logo]()
$369
This Delta deal was found by Cheapflights users on 5/21. 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 10/86:00 am
PWM
- STL
1 stop6h 59m
Delta
Mon 10/124:13 pm
STL
- PWM
1 stop6h 36m
Delta
Deal found 5/21![Delta logo]()
$403
This Southwest deal was found by Cheapflights users on 5/20. 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 6/307:10 pm
PWM
- STL
1 stop4h 50m
Southwest
Mon 7/65:20 pm
STL
- PWM
1 stop5h 45m
Southwest
Deal found 5/20![Southwest logo]()
$373
This Southwest deal was found by Cheapflights users on 5/18. 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 6/165:30 am
PWM
- STL
1 stop7h 00m
Southwest
Mon 6/225:20 pm
STL
- PWM
1 stop5h 45m
Southwest
Deal found 5/18![Southwest logo]()
$373
This Southwest deal was found by Cheapflights users on 5/21. 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.
Fri 10/212:50 pm
BOS
- STL
2 stops9h 05m
Southwest
Tue 10/63:30 pm
STL
- BOS
1 stop5h 55m
Southwest
Deal found 5/21![Southwest logo]()
$379
This Southwest deal was found by Cheapflights users on 5/21. 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 7/23:55 pm
BOS
- STL
2 stops6h 05m
Southwest
Tue 7/75:40 am
STL
- BOS
1 stop4h 15m
Southwest
Deal found 5/21![Southwest logo]()
$379
This Southwest deal was found by Cheapflights users on 5/22. 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.
Fri 8/2812:40 pm
BOS
- STL
1 stop4h 40m
Southwest
Mon 8/315:35 am
STL
- BOS
2 stops7h 55m
Southwest
Deal found 5/22![Southwest logo]()
$387
This Southwest deal was found by Cheapflights users on 5/22. 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 6/81:20 pm
BOS
- STL
2 stops8h 30m
Southwest
Fri 6/124:35 pm
STL
- BOS
2 stops6h 30m
Southwest
Deal found 5/22![Southwest logo]()
$401
This Southwest deal was found by Cheapflights users on 5/18. 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 7/305:20 pm
PWM
- STL
1 stop6h 50m
Southwest
Mon 8/33:35 pm
STL
- PWM
1 stop5h 35m
Southwest
Deal found 5/18![Southwest logo]()
$427
This Southwest deal was found by Cheapflights users on 5/18. 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 7/165:20 pm
PWM
- STL
2 stops8h 15m
Southwest
Sun 7/196:45 pm
STL
- PWM
1 stop4h 20m
Southwest
Deal found 5/18![Southwest logo]()
$432
This Southwest deal was found by Cheapflights users on 5/18. 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.
Fri 7/315:35 am
PWM
- STL
2 stops13h 55m
Southwest
Mon 8/35:20 pm
STL
- PWM
1 stop5h 45m
Southwest
Deal found 5/18![Southwest logo]()
$438
Last-minute flights from Maine to St. LouisDiscover last-minute flight deals from Maine to St. Louis. Data last updated May 23, 2026 and is based on user searches.
Discover last-minute flight deals from Maine to St. Louis. Data last updated May 23, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 5/21. 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 5/221:10 pm
BOS
- STL
1 stop5h 06m
Delta
Wed 5/279:30 am
STL
- BOS
1 stop5h 58m
Delta
Deal found 5/21![Delta logo]()
$352
This Kiwi.com deal was found by Cheapflights users on 5/20. 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 6/512:01 pm
BOS
- STL
1 stop21h 54m
Frontier
Mon 6/85:27 pm
STL
- BOS
1 stop13h 25m
Frontier
Deal found 5/20![Frontier logo]()
$346
This American Airlines deal was found by Cheapflights users on 5/21. 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 6/612:56 pm
BGR
- STL
1 stop7h 23m
American Airlines
Wed 6/101:42 pm
STL
- BGR
1 stop8h 21m
American Airlines
Deal found 5/21![American Airlines logo]()
$333
This Kiwi.com deal was found by Cheapflights users on 5/19. 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 6/128:47 am
BOS
- STL
2 stops25h 05m
Frontier
Mon 6/155:06 pm
STL
- BOS
1 stop7h 21m
Frontier
Deal found 5/19![Frontier logo]()
$344
This Frontier deal was found by Cheapflights users on 5/20. 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.
Sun 6/146:00 am
BOS
- STL
1 stop12h 30m
Frontier
Sat 6/205:06 pm
STL
- BOS
1 stop7h 21m
Frontier
Deal found 5/20![Frontier logo]()
$350
This Frontier deal was found by Cheapflights users on 5/20. 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.
Sun 6/146:00 am
BOS
- STL
1 stop12h 30m
Frontier
Fri 6/195:06 pm
STL
- BOS
1 stop7h 21m
Frontier
Deal found 5/20![Frontier logo]()
$351
This Southwest deal was found by Cheapflights users on 5/18. 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 6/175:50 am
BOS
- STL
Nonstop2h 55m
Southwest
Tue 6/309:40 am
STL
- BOS
1 stop7h 20m
Southwest
Deal found 5/18![Southwest logo]()
$347
This Kiwi.com deal was found by Cheapflights users on 5/20. 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 6/178:47 am
BOS
- STL
2 stops16h 02m
Frontier
Wed 6/245:06 pm
STL
- BOS
1 stop7h 21m
Frontier
Deal found 5/20![Frontier logo]()
$348
This Kiwi.com deal was found by Cheapflights users on 5/21. 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 6/1912:01 pm
BOS
- STL
1 stop21h 51m
Frontier
Sat 6/205:06 pm
STL
- BOS
1 stop7h 21m
Frontier
Deal found 5/21![Frontier logo]()
$345
This American Airlines deal was found by Cheapflights users on 5/20. 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 6/306:09 am
PWM
- STL
1 stop8h 03m
American Airlines
Tue 7/76:14 am
STL
- PWM
1 stop7h 02m
American Airlines
Deal found 5/20![American Airlines logo]()
$319
This Southwest deal was found by Cheapflights users on 5/20. 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 6/305:30 am
PWM
- STL
1 stop7h 00m
Southwest
Tue 7/73:15 pm
STL
- PWM
2 stops6h 40m
Southwest
Deal found 5/20![Southwest logo]()
$324
This United Airlines deal was found by Cheapflights users on 5/20. 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 6/307:12 pm
BGR
- STL
1 stop5h 24m
United Airlines
Sat 7/46:00 am
STL
- BGR
1 stop7h 10m
United Airlines
Deal found 5/20![United Airlines logo]()
$329
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 May 23, 2026.
Search for one-way flight options from Maine to St. Louis. Find affordable one-way fares based on user searches. Data last updated May 23, 2026.
This Kiwi.com deal was found by Cheapflights users on 5/18. 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 6/29:12 am
BOS
- STL
1 stop24h 43m
Frontier
Deal found 5/18![Frontier logo]()
$88
This Super.com deal was found by Cheapflights users on 5/18. 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 6/169:10 am
BOS
- STL
1 stop9h 20m
Frontier
Deal found 5/18![Frontier logo]()
$100
This Orbitz deal was found by Cheapflights users on 5/18. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/216:00 am
BOS
- STL
1 stop12h 37m
Frontier
Deal found 5/18![Frontier logo]()
$101
This Frontier deal was found by Cheapflights users on 5/18. 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 7/1111:05 am
BOS
- STL
1 stop13h 54m
Frontier
Deal found 5/18![Frontier logo]()
$115
This Super.com deal was found by Cheapflights users on 5/18. 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.
Thu 6/119:10 am
BOS
- STL
1 stop9h 20m
Frontier
Deal found 5/18![Frontier logo]()
$119
This Super.com deal was found by Cheapflights users on 5/20. 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 6/236:00 am
BOS
- STL
1 stop12h 30m
Frontier
Deal found 5/20![Frontier logo]()
$120
This Super.com deal was found by Cheapflights users on 5/22. 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.
Sun 7/1211:52 am
BOS
- STL
1 stop6h 45m
Frontier
Deal found 5/22![Frontier logo]()
$125
This Frontier deal was found by Cheapflights users on 5/22. 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
Deal found 5/22![Frontier logo]()
$126
This Kiwi.com deal was found by Cheapflights users on 5/20. 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 6/246:59 pm
BGR
- STL
2 stops38h 53m
Multiple Airlines
Deal found 5/20![Multiple Airlines logo]()
$154
This Delta deal was found by Cheapflights users on 5/18. 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.
Sat 9/122:40 pm
BGR
- STL
1 stop7h 10m
Delta
Deal found 5/18![Delta logo]()
$159
This American Airlines deal was found by Cheapflights users on 5/19. 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 6/245:38 am
PWM
- STL
1 stop5h 34m
American Airlines
Deal found 5/19![American Airlines logo]()
$160
This Kiwi.com deal was found by Cheapflights users on 5/21. 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 8/188:00 am
PWM
- STL
3 stops25h 52m
Multiple Airlines
Deal found 5/21![Multiple Airlines logo]()
$163
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 May 23, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $284 (Kiwi.com) |
One-way from | $88 (Kiwi.com) |
Popular in | June |
Cheapest in | September |
Average price | $394 |
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 May 23, 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
Fri 7/3
3:45 pm-8:46 pm
1 stop6h 01m
Lambert-St Louis
Wed 7/8
5:00 pm-11:11 pm
1 stop5h 11m
$317
PortlandSt. Louis
PWM - STL
PWMSTL
Portland
Tue 6/30
5:30 am-11:30 am
1 stop7h 00m
Lambert-St Louis
Tue 7/7
3:15 pm-10:55 pm
2 stops6h 40m
$324
BostonSt. Louis
BOS - STL
BOSSTL
Boston Logan Intl
Tue 6/2
5:45 am-7:45 am
Nonstop3h 00m
Lambert-St Louis
Fri 6/5
4:35 pm-12:05 am
2 stops6h 30m
$347
BostonSt. Louis
BOS - STL
BOSSTL
Boston Logan Intl
Wed 6/17
6:25 pm-8:30 pm
Nonstop3h 05m
Lambert-St Louis
Wed 6/24
3:10 pm-11:30 pm
1 stop7h 20m
$347
BostonSt. Louis
BOS - STL
BOSSTL
Boston Logan Intl
Mon 6/15
5:30 am-9:37 am
1 stop5h 07m
Lambert-St Louis
Sat 6/20
6:10 pm-11:54 pm
1 stop4h 44m
$352
BostonSt. Louis
BOS - STL
BOSSTL
Boston Logan Intl
Fri 8/28
3:00 pm-8:31 pm
1 stop6h 31m
Lambert-St Louis
Tue 9/1
5:45 pm-11:32 pm
1 stop4h 47m
$352
BostonSt. Louis
BOS - STL
BOSSTL
Boston Logan Intl
Fri 6/5
5:40 am-9:29 am
1 stop4h 49m
Lambert-St Louis
Tue 6/9
7:12 pm-1:31 am
1 stop5h 19m
$352
Quickest round-trip
BostonSt. Louis
BOS - STL
BOSSTL
Boston Logan Intl
Wed 7/22
5:50 am-7:45 am
Nonstop2h 55m
Lambert-St Louis
Sun 7/26
8:00 pm-11:30 pm
Nonstop2h 30m
$354
BostonSt. Louis
BOS - STL
BOSSTL
Boston Logan Intl
Tue 7/28
5:50 am-7:45 am
Nonstop2h 55m
Lambert-St Louis
Mon 8/3
7:55 pm-11:30 pm
Nonstop2h 35m
$354
PortlandSt. Louis
PWM - STL
PWMSTL
Portland
Wed 7/8
7:10 pm-11:00 pm
1 stop4h 50m
Lambert-St Louis
Tue 7/14
3:15 pm-10:55 pm
2 stops6h 40m
$369
Showing 1-10 of 51 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.
BGR-STL
PWM-STL
BOS-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
BGR-STL
PWM-STL
BOS-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 $142). 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
Maryland Heights
Collinsville
Eureka
Wentzville
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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St. Louis flight routes
Top destinations
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 May 23, 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 May 23, 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 May 23, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$236 | Average$364 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$254 | Average$305 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$263 | Average$427 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$348 | Average$407 | FlexibilityNo cancel fee | On-time63% |