$86+ 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 4/28. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — STL
Apr 27 — May 41
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
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
Cheapest
Best
Last-minute
One-way
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 March 28, 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 March 28, 2026.
This Delta deal was found by Cheapflights users on 3/24. 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 5/124:48 pm
PWM
- STL
1 stop5h 21m
Delta
Wed 5/136:45 am
STL
- PWM
1 stop4h 15m
Delta
Deal found 3/24![Delta logo]()
$259
This Delta deal was found by Cheapflights users on 3/26. 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 5/76:02 am
PWM
- STL
1 stop7h 21m
Delta
Wed 5/134:25 pm
STL
- PWM
1 stop7h 18m
Delta
Deal found 3/26![Delta logo]()
$285
This American Airlines deal was found by Cheapflights users on 3/23. 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 5/77:05 am
PWM
- STL
1 stop5h 42m
American Airlines
Wed 5/135:21 pm
STL
- PWM
1 stop5h 01m
American Airlines
Deal found 3/23![American Airlines logo]()
$288
This Kiwi.com deal was found by Cheapflights users on 3/27. 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 4/97:53 pm
BGR
- STL
1 stop12h 58m
Multiple Airlines
Mon 4/134:59 pm
STL
- BGR
1 stop17h 41m
Multiple Airlines
Deal found 3/27![Multiple Airlines logo]()
$289
This Delta deal was found by Cheapflights users on 3/24. 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 5/114:48 pm
PWM
- STL
1 stop5h 21m
Delta
Wed 5/134:25 pm
STL
- PWM
1 stop7h 18m
Delta
Deal found 3/24![Delta logo]()
$311
This American Airlines deal was found by Cheapflights users on 3/28. 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 4/227:08 am
BGR
- STL
1 stop6h 40m
American Airlines
Wed 4/292:33 pm
STL
- BGR
1 stop7h 52m
American Airlines
Deal found 3/28![American Airlines logo]()
$319
This Delta deal was found by Cheapflights users on 3/26. 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 4/225:15 am
BGR
- STL
2 stops7h 41m
Delta
Wed 4/295:27 pm
STL
- BGR
1 stop5h 04m
Delta
Deal found 3/26![Delta logo]()
$324
This Delta deal was found by Cheapflights users on 3/25. 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 4/154:43 pm
PWM
- STL
1 stop5h 01m
Delta
Mon 4/205:27 pm
STL
- PWM
1 stop4h 57m
Delta
Deal found 3/25![Delta logo]()
$329
This United Airlines deal was found by Cheapflights users on 3/24. 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 5/164:50 pm
PWM
- STL
1 stop5h 23m
United Airlines
Sat 5/231:13 pm
STL
- PWM
1 stop7h 38m
United Airlines
Deal found 3/24![United Airlines logo]()
$333
This United Airlines deal was found by Cheapflights users on 3/26. 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 5/294:51 pm
PWM
- STL
1 stop5h 25m
United Airlines
Mon 6/11:13 pm
STL
- PWM
1 stop7h 38m
United Airlines
Deal found 3/26![United Airlines logo]()
$337
This Southwest deal was found by Cheapflights users on 3/26. 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 6/15:30 am
PWM
- STL
1 stop6h 20m
Southwest
Thu 6/42:25 pm
STL
- PWM
2 stops8h 40m
Southwest
Deal found 3/26![Southwest logo]()
$338
This Delta deal was found by Cheapflights users on 3/27. 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 9/36:00 am
BGR
- STL
1 stop6h 54m
Delta
Wed 9/91:30 pm
STL
- BGR
2 stops8h 58m
Delta
Deal found 3/27![Delta 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 March 28, 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 March 28, 2026.
This American Airlines deal was found by Cheapflights users on 3/23. 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 5/77:05 am
PWM
- STL
1 stop5h 42m
American Airlines
Wed 5/135:21 pm
STL
- PWM
1 stop5h 01m
American Airlines
Deal found 3/23![American Airlines logo]()
$288
This Delta deal was found by Cheapflights users on 3/27. 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 5/212:55 pm
BGR
- STL
2 stops11h 18m
Delta
Tue 5/55:27 pm
STL
- BGR
1 stop5h 04m
Delta
Deal found 3/27![Delta logo]()
$324
This Southwest deal was found by Cheapflights users on 3/26. 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 4/293:55 pm
PWM
- STL
1 stop6h 10m
Southwest
Sun 5/36:50 pm
STL
- PWM
1 stop4h 15m
Southwest
Deal found 3/26![Southwest logo]()
$343
This United Airlines deal was found by Cheapflights users on 3/24. 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 5/93:39 pm
PWM
- STL
2 stops8h 40m
United Airlines
Tue 5/1210:25 am
STL
- PWM
2 stops7h 39m
United Airlines
Deal found 3/24![United Airlines logo]()
$417
This American Airlines deal was found by Cheapflights users on 3/26. 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 4/227:08 am
BGR
- STL
1 stop6h 40m
American Airlines
Wed 4/292:33 pm
STL
- BGR
1 stop7h 52m
American Airlines
Deal found 3/26![American Airlines logo]()
$319
This Delta deal was found by Cheapflights users on 3/26. 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 4/225:15 am
BGR
- STL
2 stops7h 41m
Delta
Wed 4/295:27 pm
STL
- BGR
1 stop5h 04m
Delta
Deal found 3/26![Delta logo]()
$324
This Delta deal was found by Cheapflights users on 3/27. 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 9/36:00 am
BGR
- STL
1 stop6h 54m
Delta
Wed 9/91:30 pm
STL
- BGR
2 stops8h 58m
Delta
Deal found 3/27![Delta logo]()
$339
This Southwest deal was found by Cheapflights users on 3/23. 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 4/155:45 am
BOS
- STL
Nonstop3h 00m
Southwest
Fri 4/177:40 pm
STL
- BOS
Nonstop2h 30m
Southwest
Deal found 3/23![Southwest logo]()
$379
This United Airlines deal was found by Cheapflights users on 3/27. 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 5/29:40 am
PWM
- STL
1 stop5h 52m
United Airlines
Wed 5/67:45 am
STL
- PWM
1 stop5h 29m
United Airlines
Deal found 3/27![United Airlines logo]()
$421
This Southwest deal was found by Cheapflights users on 3/23. 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 5/75:40 am
BOS
- STL
Nonstop3h 00m
Southwest
Thu 5/147:40 pm
STL
- BOS
Nonstop2h 30m
Southwest
Deal found 3/23![Southwest logo]()
$408
This Delta deal was found by Cheapflights users on 3/26. 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 4/1012:28 pm
BGR
- STL
2 stops11h 57m
Delta
Tue 4/145:27 pm
STL
- BGR
1 stop5h 04m
Delta
Deal found 3/26![Delta logo]()
$389
This United Airlines deal was found by Cheapflights users on 3/24. 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 4/1411:09 am
PWM
- STL
2 stops11h 04m
United Airlines
Thu 4/169:10 am
STL
- PWM
1 stop7h 22m
United Airlines
Deal found 3/24![United Airlines logo]()
$430
This Southwest deal was found by Cheapflights users on 3/23. 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 5/233:15 pm
BOS
- STL
Nonstop2h 55m
Southwest
Sun 5/315:25 am
STL
- BOS
1 stop6h 30m
Southwest
Deal found 3/23![Southwest logo]()
$417
This Delta deal was found by Cheapflights users on 3/25. 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 4/95:30 am
BGR
- STL
1 stop7h 52m
Delta
Mon 4/136:48 am
STL
- BGR
2 stops8h 31m
Delta
Deal found 3/25![Delta logo]()
$389
This United Airlines deal was found by Cheapflights users on 3/23. 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 5/75:30 am
PWM
- STL
2 stops10h 02m
United Airlines
Wed 5/137:45 am
STL
- PWM
1 stop5h 29m
United Airlines
Deal found 3/23![United Airlines logo]()
$446
This Southwest deal was found by Cheapflights users on 3/26. 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 4/105:30 am
PWM
- STL
1 stop6h 20m
Southwest
Tue 4/142:30 pm
STL
- PWM
2 stops7h 05m
Southwest
Deal found 3/26![Southwest logo]()
$421
This Delta deal was found by Cheapflights users on 3/27. 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 9/43:00 pm
BGR
- STL
2 stops9h 37m
Delta
Tue 9/81:30 pm
STL
- BGR
2 stops8h 58m
Delta
Deal found 3/27![Delta logo]()
$390
This Southwest deal was found by Cheapflights users on 3/27. 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 5/74:50 pm
PWM
- STL
1 stop7h 35m
Southwest
Wed 5/135:35 am
STL
- PWM
2 stops8h 45m
Southwest
Deal found 3/27![Southwest logo]()
$424
This United Airlines deal was found by Cheapflights users on 3/24. 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 6/57:30 am
BOS
- STL
2 stops9h 16m
United Airlines
Tue 6/95:41 pm
STL
- BOS
1 stop6h 18m
United Airlines
Deal found 3/24![United Airlines logo]()
$468
This Delta deal was found by Cheapflights users on 3/27. 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 9/36:00 am
BGR
- STL
2 stops10h 57m
Delta
Tue 9/81:30 pm
STL
- BGR
2 stops8h 58m
Delta
Deal found 3/27![Delta logo]()
$390
This Southwest deal was found by Cheapflights users on 3/24. 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 5/165:40 am
PWM
- STL
1 stop5h 20m
Southwest
Sat 5/232:05 pm
STL
- PWM
2 stops8h 05m
Southwest
Deal found 3/24![Southwest logo]()
$425
This United Airlines deal was found by Cheapflights users on 3/26. 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 5/75:45 am
BOS
- STL
2 stops8h 02m
United Airlines
Mon 5/117:45 am
STL
- BOS
1 stop7h 31m
United Airlines
Deal found 3/26![United Airlines logo]()
$468
This United Airlines deal was found by Cheapflights users on 3/26. 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 4/235:45 am
BOS
- STL
2 stops9h 39m
United Airlines
Mon 4/277:45 am
STL
- BOS
1 stop6h 03m
United Airlines
Deal found 3/26![United Airlines logo]()
$468
This Southwest deal was found by Cheapflights users on 3/24. 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 6/265:35 am
PWM
- STL
2 stops13h 55m
Southwest
Mon 6/293:35 pm
STL
- PWM
2 stops7h 30m
Southwest
Deal found 3/24![Southwest logo]()
$443
This Delta deal was found by Cheapflights users on 3/24. 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 7/89:05 am
BOS
- STL
1 stop6h 30m
Delta
Mon 7/135:19 pm
STL
- BOS
1 stop7h 01m
Delta
Deal found 3/24![Delta logo]()
$481
This United Airlines deal was found by Cheapflights users on 3/24. 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 5/162:22 pm
BOS
- STL
2 stops7h 51m
United Airlines
Wed 5/207:09 pm
STL
- BOS
1 stop4h 50m
United Airlines
Deal found 3/24![United Airlines logo]()
$489
This Southwest deal was found by Cheapflights users on 3/25. 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 7/97:30 am
BOS
- STL
1 stop5h 40m
Southwest
Sun 7/128:00 pm
STL
- BOS
Nonstop2h 30m
Southwest
Deal found 3/25![Southwest logo]()
$471
This Delta deal was found by Cheapflights users on 3/26. 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 7/137:00 am
BOS
- STL
1 stop5h 47m
Delta
Mon 7/205:19 pm
STL
- BOS
1 stop5h 40m
Delta
Deal found 3/26![Delta logo]()
$481
This Southwest deal was found by Cheapflights users on 3/23. 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 7/161:20 pm
BOS
- STL
2 stops8h 30m
Southwest
Sun 7/198:00 pm
STL
- BOS
Nonstop2h 30m
Southwest
Deal found 3/23![Southwest logo]()
$476
This Delta deal was found by Cheapflights users on 3/24. 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 7/104:00 pm
BOS
- STL
1 stop5h 31m
Delta
Sun 7/125:38 pm
STL
- BOS
1 stop4h 53m
Delta
Deal found 3/24![Delta logo]()
$481
Last-minute flights from Maine to St. LouisDiscover last-minute flight deals from Maine to St. Louis. Data last updated March 28, 2026 and is based on user searches.
Discover last-minute flight deals from Maine to St. Louis. Data last updated March 28, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 3/27. 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 4/97:53 pm
BGR
- STL
1 stop12h 58m
Multiple Airlines
Mon 4/134:59 pm
STL
- BGR
1 stop17h 41m
Multiple Airlines
Deal found 3/27![Multiple Airlines logo]()
$289
This Kiwi.com deal was found by Cheapflights users on 3/28. 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 4/1112:40 pm
BOS
- STL
1 stop22h 58m
Multiple Airlines
Wed 4/158:23 pm
STL
- BOS
2 stops36h 06m
Multiple Airlines
Deal found 3/28![Multiple Airlines logo]()
$346
This Kiwi.com deal was found by Cheapflights users on 3/26. 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 4/1212:47 pm
BOS
- STL
2 stops20h 04m
Frontier
Tue 4/144:59 pm
STL
- BOS
1 stop16h 22m
Frontier
Deal found 3/26![Frontier logo]()
$344
This Kiwi.com deal was found by Cheapflights users on 3/26. 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 4/1312:42 pm
BOS
- STL
2 stops11h 43m
Frontier
Sat 4/188:23 pm
STL
- BOS
1 stop13h 37m
Frontier
Deal found 3/26![Frontier logo]()
$343
This American Airlines deal was found by Cheapflights users on 3/24. 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 4/146:01 pm
PWM
- STL
1 stop5h 18m
American Airlines
Thu 4/166:35 am
STL
- PWM
1 stop7h 34m
American Airlines
Deal found 3/24![American Airlines logo]()
$285
This Delta deal was found by Cheapflights users on 3/25. 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 4/154:43 pm
PWM
- STL
1 stop5h 01m
Delta
Mon 4/205:27 pm
STL
- PWM
1 stop4h 57m
Delta
Deal found 3/25![Delta logo]()
$329
This Kiwi.com deal was found by Cheapflights users on 3/26. 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 4/152:18 pm
BOS
- STL
2 stops21h 12m
Multiple Airlines
Fri 4/174:59 pm
STL
- BOS
1 stop16h 22m
Multiple Airlines
Deal found 3/26![Multiple Airlines logo]()
$340
This American Airlines deal was found by Cheapflights users on 3/28. 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 4/227:08 am
BGR
- STL
1 stop6h 40m
American Airlines
Wed 4/292:33 pm
STL
- BGR
1 stop7h 52m
American Airlines
Deal found 3/28![American Airlines logo]()
$319
This Delta deal was found by Cheapflights users on 3/26. 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 4/225:15 am
BGR
- STL
2 stops7h 41m
Delta
Wed 4/295:27 pm
STL
- BGR
1 stop5h 04m
Delta
Deal found 3/26![Delta logo]()
$324
This Southwest deal was found by Cheapflights users on 3/26. 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 4/236:55 pm
BOS
- STL
1 stop4h 50m
Southwest
Tue 4/283:55 pm
STL
- BOS
1 stop7h 10m
Southwest
Deal found 3/26![Southwest logo]()
$341
This Kiwi.com deal was found by Cheapflights users on 3/27. 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 4/246:00 am
BOS
- STL
1 stop25h 50m
Multiple Airlines
Fri 5/18:23 pm
STL
- BOS
2 stops20h 10m
Multiple Airlines
Deal found 3/27![Multiple Airlines logo]()
$345
This Southwest deal was found by Cheapflights users on 3/26. 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 4/293:55 pm
PWM
- STL
1 stop6h 10m
Southwest
Sun 5/36:50 pm
STL
- PWM
1 stop4h 15m
Southwest
Deal found 3/26![Southwest logo]()
$343
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 March 28, 2026.
Search for one-way flight options from Maine to St. Louis. Find affordable one-way fares based on user searches. Data last updated March 28, 2026.
This Frontier deal was found by Cheapflights users on 3/27. 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 4/2811:16 am
BOS
- STL
1 stop13h 03m
Frontier
Deal found 3/27![Frontier logo]()
$86
This Frontier deal was found by Cheapflights users on 3/27. 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 5/289:12 am
BOS
- STL
1 stop9h 21m
Frontier
Deal found 3/27![Frontier logo]()
$106
This Expedia deal was found by Cheapflights users on 3/23. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/1010:07 am
BOS
- STL
1 stop15h 14m
Frontier
Deal found 3/23![Frontier logo]()
$107
This Frontier deal was found by Cheapflights users on 3/27. 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 5/246:00 am
BOS
- STL
1 stop12h 33m
Frontier
Deal found 3/27![Frontier logo]()
$111
This CheapOair deal was found by Cheapflights users on 3/28. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/2710:08 am
BOS
- STL
1 stop14h 11m
Frontier
Deal found 3/28![Frontier logo]()
$112
This Kiwi.com deal was found by Cheapflights users on 3/28. 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 5/278:44 am
BOS
- STL
2 stops33h 49m
Frontier
Deal found 3/28![Frontier logo]()
$114
This Kiwi.com deal was found by Cheapflights users on 3/26. 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 5/1210:07 am
BOS
- STL
2 stops23h 48m
Frontier
Deal found 3/26![Frontier logo]()
$125
This Frontier deal was found by Cheapflights users on 3/27. 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 4/2511:06 am
BOS
- STL
1 stop13h 13m
Frontier
Deal found 3/27![Frontier logo]()
$127
This Kiwi.com deal was found by Cheapflights users on 3/25. 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 5/168:40 am
BOS
- STL
2 stops11h 43m
Frontier
Deal found 3/25![Frontier logo]()
$128
This Kiwi.com deal was found by Cheapflights users on 3/25. 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 4/216:00 am
BOS
- STL
1 stop25h 50m
Frontier
Deal found 3/25![Frontier logo]()
$129
This Kiwi.com deal was found by Cheapflights users on 3/27. 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 4/275:06 pm
PWM
- STL
3 stops38h 44m
Multiple Airlines
Deal found 3/27![Multiple Airlines logo]()
$139
This American Airlines deal was found by Cheapflights users on 3/25. 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.
Mon 4/276:01 pm
PWM
- STL
1 stop6h 45m
American Airlines
Deal found 3/25![American Airlines logo]()
$156
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 March 28, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $259 (Delta) |
One-way from | $86 (Frontier) |
Popular in | November |
Cheapest in | September |
Average price | $344 |
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 March 28, 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
PortlandSt. Louis
PWM - STL
PWMSTL
Portland
Thu 5/7
7:05 am-11:47 am
1 stop5h 42m
Lambert-St Louis
Wed 5/13
5:21 pm-11:22 pm
1 stop5h 01m
$288
BangorSt. Louis
BGR - STL
BGRSTL
Bangor
Wed 4/22
7:08 am-12:48 pm
1 stop6h 40m
Lambert-St Louis
Wed 4/29
2:33 pm-11:25 pm
1 stop7h 52m
$319
BangorSt. Louis
BGR - STL
BGRSTL
Bangor
Sat 5/2
12:55 pm-11:13 pm
2 stops11h 18m
Lambert-St Louis
Tue 5/5
5:27 pm-11:31 pm
1 stop5h 04m
$324
BangorSt. Louis
BGR - STL
BGRSTL
Bangor
Wed 4/22
5:15 am-11:56 am
2 stops7h 41m
Lambert-St Louis
Wed 4/29
5:27 pm-11:31 pm
1 stop5h 04m
$324
BangorSt. Louis
BGR - STL
BGRSTL
Bangor
Thu 9/3
6:00 am-11:54 am
1 stop6h 54m
Lambert-St Louis
Wed 9/9
1:30 pm-11:28 pm
2 stops8h 58m
$339
PortlandSt. Louis
PWM - STL
PWMSTL
Portland
Wed 4/29
3:55 pm-9:05 pm
1 stop6h 10m
Lambert-St Louis
Sun 5/3
6:50 pm-12:05 am
1 stop4h 15m
$343
Quickest round-trip
BostonSt. Louis
BOS - STL
BOSSTL
Boston Logan Intl
Wed 4/15
5:45 am-7:45 am
Nonstop3h 00m
Lambert-St Louis
Fri 4/17
7:40 pm-11:10 pm
Nonstop2h 30m
$379
BangorSt. Louis
BGR - STL
BGRSTL
Bangor
Fri 4/10
12:28 pm-11:25 pm
2 stops11h 57m
Lambert-St Louis
Tue 4/14
5:27 pm-11:31 pm
1 stop5h 04m
$389
BangorSt. Louis
BGR - STL
BGRSTL
Bangor
Thu 4/9
5:30 am-12:22 pm
1 stop7h 52m
Lambert-St Louis
Mon 4/13
6:48 am-4:19 pm
2 stops8h 31m
$389
BangorSt. Louis
BGR - STL
BGRSTL
Bangor
Fri 9/4
3:00 pm-11:37 pm
2 stops9h 37m
Lambert-St Louis
Tue 9/8
1:30 pm-11:28 pm
2 stops8h 58m
$390
Showing 1-10 of 55 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.
PWM-STL
BGR-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
PWM-STL
BGR-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 $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.
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.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Popular flights
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 March 28, 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 March 28, 2026.
Maine to St. Louis flights
Consider these flights traveling from Maine to St. Louis.
Top 2 airlines flying from Maine to St. Louis
Discover the top 2 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 March 28, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$236 | Average$365 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$258 | Average$449 | FlexibilityNo cancel fee | On-time71% |