$78+ Cheap flights from Massachusetts 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 5/19. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — STL
May 18 — May 251
Round-trip
1 adult, Economy
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Cheapest flights from Massachusetts to St. LouisExplore the most affordable flight options available from Massachusetts to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 18, 2026.
Explore the most affordable flight options available from Massachusetts to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 18, 2026.
This CheapOair deal was found by Cheapflights users on 4/14. 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.
Fri 6/55:40 pm
BDL
- STL
1 stop7h 17m
Frontier
Sun 6/74:19 pm
STL
- BDL
1 stop23h 40m
Frontier
Deal found 4/14![Frontier logo]()
$212
This Kiwi.com deal was found by Cheapflights users on 4/14. 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 5/97:43 pm
BDL
- STL
1 stop29h 38m
Multiple Airlines
Tue 5/196:33 pm
STL
- BDL
2 stops28h 26m
Multiple Airlines
Deal found 4/14![Multiple Airlines logo]()
$213
This Kiwi.com deal was found by Cheapflights users on 4/14. 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 5/155:44 pm
BDL
- STL
1 stop7h 37m
Multiple Airlines
Tue 5/196:33 pm
STL
- BDL
2 stops28h 26m
Multiple Airlines
Deal found 4/14![Multiple Airlines logo]()
$224
This Kiwi.com deal was found by Cheapflights users on 4/14. 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 5/97:43 pm
BDL
- STL
1 stop29h 38m
Frontier
Fri 5/154:19 pm
STL
- BDL
1 stop25h 39m
Frontier
Deal found 4/14![Frontier logo]()
$234
This Kiwi.com deal was found by Cheapflights users on 4/13. 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 5/295:40 pm
BDL
- STL
1 stop7h 17m
Multiple Airlines
Mon 6/111:24 am
STL
- BDL
2 stops10h 25m
Multiple Airlines
Deal found 4/13![Multiple Airlines logo]()
$235
This Kiwi.com deal was found by Cheapflights users on 4/14. 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 5/97:43 pm
BDL
- STL
1 stop29h 38m
Multiple Airlines
Fri 5/155:27 pm
STL
- BDL
2 stops29h 32m
Multiple Airlines
Deal found 4/14![Multiple Airlines logo]()
$238
This Trip.com deal was found by Cheapflights users on 4/14. 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.
Fri 5/18:42 pm
BDL
- STL
1 stop27h 37m
Frontier
Sun 5/34:59 pm
STL
- BDL
2 stops20h 50m
Frontier
Deal found 4/14![Frontier logo]()
$247
This Kiwi.com deal was found by Cheapflights users on 4/13. 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 5/255:44 pm
BDL
- STL
1 stop7h 13m
Multiple Airlines
Tue 5/266:33 pm
STL
- BDL
2 stops23h 19m
Multiple Airlines
Deal found 4/13![Multiple Airlines logo]()
$250
This Kiwi.com deal was found by Cheapflights users on 4/14. 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 5/97:43 pm
BDL
- STL
1 stop29h 38m
Multiple Airlines
Mon 5/185:27 pm
STL
- BDL
2 stops22h 43m
Multiple Airlines
Deal found 4/14![Multiple Airlines logo]()
$264
This Kiwi.com deal was found by Cheapflights users on 4/13. 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 6/48:00 am
BDL
- STL
2 stops10h 33m
Multiple Airlines
Sat 6/64:19 pm
STL
- BDL
1 stop7h 32m
Multiple Airlines
Deal found 4/13![Multiple Airlines logo]()
$268
This Kiwi.com deal was found by Cheapflights users on 4/14. 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 5/115:44 pm
BDL
- STL
1 stop7h 37m
Frontier
Sat 5/164:19 pm
STL
- BDL
2 stops35h 51m
Frontier
Deal found 4/14![Frontier logo]()
$269
This American Airlines deal was found by Cheapflights users on 4/15. 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 5/126:26 am
ALB
- STL
1 stop6h 21m
American Airlines
Wed 5/137:00 am
STL
- ALB
1 stop5h 26m
American Airlines
Deal found 4/15![American Airlines logo]()
$297
Best flights from Massachusetts to St. LouisDiscover carefully curated flight deals from Massachusetts to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 18, 2026.
Discover carefully curated flight deals from Massachusetts to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 18, 2026.
This Southwest deal was found by Cheapflights users on 4/14. 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 5/145:30 pm
ALB
- STL
1 stop7h 10m
Southwest
Thu 5/215:05 am
STL
- ALB
1 stop12h 40m
Southwest
Deal found 4/14![Southwest logo]()
$340
This Delta deal was found by Cheapflights users on 4/14. 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 5/215:15 pm
BDL
- STL
1 stop7h 44m
Delta
Thu 5/281:27 pm
STL
- BDL
1 stop6h 45m
Delta
Deal found 4/14![Delta logo]()
$351
This United Airlines deal was found by Cheapflights users on 4/13. 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 5/56:00 am
ALB
- STL
1 stop5h 28m
United Airlines
Wed 5/69:21 am
STL
- ALB
1 stop4h 43m
United Airlines
Deal found 4/13![United Airlines logo]()
$377
This Southwest deal was found by Cheapflights users on 4/13. 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 6/45:50 am
BDL
- STL
1 stop6h 00m
Southwest
Sat 6/69:30 am
STL
- BDL
1 stop6h 00m
Southwest
Deal found 4/13![Southwest logo]()
$351
This Delta deal was found by Cheapflights users on 4/16. 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 7/136:00 am
ALB
- STL
1 stop7h 17m
Delta
Tue 7/286:04 pm
STL
- ALB
1 stop4h 02m
Delta
Deal found 4/16![Delta logo]()
$382
This Southwest deal was found by Cheapflights users on 4/13. 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 5/285:40 am
BOS
- STL
Nonstop3h 00m
Southwest
Thu 6/47:55 pm
STL
- BOS
Nonstop2h 30m
Southwest
Deal found 4/13![Southwest logo]()
$353
This United Airlines deal was found by Cheapflights users on 4/13. 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 5/224:50 pm
BDL
- STL
1 stop5h 26m
United Airlines
Sun 5/246:00 am
STL
- BDL
2 stops7h 06m
United Airlines
Deal found 4/13![United Airlines logo]()
$412
This Delta deal was found by Cheapflights users on 4/15. 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 5/195:15 pm
BOS
- STL
1 stop4h 54m
Delta
Sun 5/246:00 am
STL
- BOS
1 stop7h 15m
Delta
Deal found 4/15![Delta logo]()
$391
This Southwest deal was found by Cheapflights users on 4/13. 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 5/152:55 pm
ALB
- STL
2 stops7h 00m
Southwest
Wed 5/203:55 pm
STL
- ALB
1 stop5h 55m
Southwest
Deal found 4/13![Southwest logo]()
$357
This United Airlines deal was found by Cheapflights users on 4/17. 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.
Tue 6/24:50 pm
BDL
- STL
1 stop5h 26m
United Airlines
Wed 6/36:00 am
STL
- BDL
2 stops7h 06m
United Airlines
Deal found 4/17![United Airlines logo]()
$420
This Delta deal was found by Cheapflights users on 4/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/77:00 am
BDL
- STL
1 stop6h 56m
Delta
Wed 10/75:45 pm
STL
- BDL
1 stop4h 52m
Delta
Deal found 4/13![Delta logo]()
$407
This Southwest deal was found by Cheapflights users on 4/13. 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.
Sun 5/105:00 am
ALB
- STL
1 stop6h 20m
Southwest
Thu 5/282:20 pm
STL
- ALB
1 stop7h 00m
Southwest
Deal found 4/13![Southwest logo]()
$381
This United Airlines deal was found by Cheapflights users on 4/15. 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 5/199:20 am
BOS
- STL
1 stop12h 53m
United Airlines
Wed 5/271:13 pm
STL
- BOS
2 stops9h 46m
United Airlines
Deal found 4/15![United Airlines logo]()
$420
This Delta deal was found by Cheapflights users on 4/14. 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 8/146:30 pm
ALB
- STL
1 stop6h 07m
Delta
Mon 8/175:00 pm
STL
- ALB
1 stop4h 52m
Delta
Deal found 4/14![Delta logo]()
$407
This Southwest deal was found by Cheapflights users on 4/14. 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 5/85:50 am
ALB
- STL
1 stop6h 00m
Southwest
Mon 5/115:00 am
STL
- ALB
1 stop6h 05m
Southwest
Deal found 4/14![Southwest logo]()
$381
This United Airlines deal was found by Cheapflights users on 4/13. 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 5/307:30 am
BOS
- STL
2 stops9h 16m
United Airlines
Tue 6/21:13 pm
STL
- BOS
1 stop10h 46m
United Airlines
Deal found 4/13![United Airlines logo]()
$438
This Delta deal was found by Cheapflights users on 4/17. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/85:30 am
ALB
- STL
1 stop7h 29m
Delta
Sun 10/113:42 pm
STL
- ALB
1 stop6h 52m
Delta
Deal found 4/17![Delta logo]()
$407
This Southwest deal was found by Cheapflights users on 4/14. 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 5/152:55 pm
ALB
- STL
2 stops7h 00m
Southwest
Mon 5/187:45 pm
STL
- ALB
1 stop11h 10m
Southwest
Deal found 4/14![Southwest logo]()
$382
This United Airlines deal was found by Cheapflights users on 4/16. 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 6/26:10 am
ALB
- STL
1 stop7h 01m
United Airlines
Wed 6/36:00 am
STL
- ALB
1 stop8h 26m
United Airlines
Deal found 4/16![United Airlines logo]()
$449
This Southwest deal was found by Cheapflights users on 4/17. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/126:20 pm
BDL
- STL
1 stop4h 50m
Southwest
Thu 5/142:25 pm
STL
- BDL
2 stops7h 45m
Southwest
Deal found 4/17![Southwest logo]()
$386
This Delta deal was found by Cheapflights users on 4/15. 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 6/192:00 pm
BOS
- STL
1 stop7h 40m
Delta
Mon 6/226:05 am
STL
- BOS
1 stop5h 18m
Delta
Deal found 4/15![Delta logo]()
$445
This United Airlines deal was found by Cheapflights users on 4/14. 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 5/285:45 am
BOS
- STL
2 stops7h 26m
United Airlines
Mon 6/15:41 pm
STL
- BOS
1 stop6h 18m
United Airlines
Deal found 4/14![United Airlines logo]()
$468
This Southwest deal was found by Cheapflights users on 4/17. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/157:20 pm
BDL
- STL
1 stop4h 25m
Southwest
Tue 5/197:35 am
STL
- BDL
2 stops6h 05m
Southwest
Deal found 4/17![Southwest logo]()
$407
This Delta deal was found by Cheapflights users on 4/17. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/135:30 am
BOS
- STL
1 stop5h 02m
Delta
Sun 6/217:12 pm
STL
- BOS
1 stop5h 19m
Delta
Deal found 4/17![Delta logo]()
$458
This Southwest deal was found by Cheapflights users on 4/14. 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.
Sun 7/126:25 pm
BDL
- STL
1 stop6h 20m
Southwest
Tue 7/215:15 am
STL
- BDL
1 stop6h 00m
Southwest
Deal found 4/14![Southwest logo]()
$417
This Southwest deal was found by Cheapflights users on 4/16. 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 7/275:50 am
BDL
- STL
1 stop6h 00m
Southwest
Thu 7/305:40 am
STL
- BDL
1 stop4h 15m
Southwest
Deal found 4/16![Southwest logo]()
$427
This Southwest deal was found by Cheapflights users on 4/13. 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 5/169:25 am
BOS
- STL
2 stops9h 45m
Southwest
Mon 5/183:25 pm
STL
- BOS
2 stops7h 30m
Southwest
Deal found 4/13![Southwest logo]()
$437
This Southwest deal was found by Cheapflights users on 4/13. 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 7/135:35 am
BOS
- STL
Nonstop2h 50m
Southwest
Thu 7/167:55 pm
STL
- BOS
Nonstop2h 30m
Southwest
Deal found 4/13![Southwest logo]()
$461
This Southwest deal was found by Cheapflights users on 4/14. 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 5/148:45 am
BOS
- STL
2 stops10h 55m
Southwest
Sat 5/165:45 am
STL
- BOS
2 stops8h 25m
Southwest
Deal found 4/14![Southwest logo]()
$462
This Southwest deal was found by Cheapflights users on 4/13. 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 10/58:40 am
BOS
- STL
1 stop4h 25m
Southwest
Mon 10/126:00 am
STL
- BOS
Nonstop2h 35m
Southwest
Deal found 4/13![Southwest logo]()
$467
Last-minute flights from Massachusetts to St. LouisDiscover last-minute flight deals from Massachusetts to St. Louis. Data last updated April 18, 2026 and is based on user searches.
Discover last-minute flight deals from Massachusetts to St. Louis. Data last updated April 18, 2026 and is based on user searches.
This Trip.com deal was found by Cheapflights users on 4/14. 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.
Fri 5/18:42 pm
BDL
- STL
1 stop27h 37m
Frontier
Sun 5/34:59 pm
STL
- BDL
2 stops20h 50m
Frontier
Deal found 4/14![Frontier logo]()
$247
This Kiwi.com deal was found by Cheapflights users on 4/14. 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 5/97:43 pm
BDL
- STL
1 stop29h 38m
Multiple Airlines
Tue 5/196:33 pm
STL
- BDL
2 stops28h 26m
Multiple Airlines
Deal found 4/14![Multiple Airlines logo]()
$213
This Kiwi.com deal was found by Cheapflights users on 4/14. 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 5/97:43 pm
BDL
- STL
1 stop29h 38m
Frontier
Fri 5/154:19 pm
STL
- BDL
1 stop25h 39m
Frontier
Deal found 4/14![Frontier logo]()
$234
This Kiwi.com deal was found by Cheapflights users on 4/14. 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 5/97:43 pm
BDL
- STL
1 stop29h 38m
Multiple Airlines
Fri 5/155:27 pm
STL
- BDL
2 stops29h 32m
Multiple Airlines
Deal found 4/14![Multiple Airlines logo]()
$238
This Kiwi.com deal was found by Cheapflights users on 4/14. 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 5/97:43 pm
BDL
- STL
1 stop29h 38m
Multiple Airlines
Mon 5/185:27 pm
STL
- BDL
2 stops22h 43m
Multiple Airlines
Deal found 4/14![Multiple Airlines logo]()
$264
This Kiwi.com deal was found by Cheapflights users on 4/14. 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 5/106:00 am
BDL
- STL
2 stops27h 55m
Frontier
Fri 5/154:19 pm
STL
- BDL
1 stop25h 39m
Frontier
Deal found 4/14![Frontier logo]()
$278
This Kiwi.com deal was found by Cheapflights users on 4/14. 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 5/115:44 pm
BDL
- STL
1 stop7h 37m
Frontier
Sat 5/164:19 pm
STL
- BDL
2 stops35h 51m
Frontier
Deal found 4/14![Frontier logo]()
$269
This Kiwi.com deal was found by Cheapflights users on 4/14. 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 5/127:15 am
BDL
- STL
2 stops11h 18m
Multiple Airlines
Fri 5/154:19 pm
STL
- BDL
1 stop25h 39m
Multiple Airlines
Deal found 4/14![Multiple Airlines logo]()
$274
This Kiwi.com deal was found by Cheapflights users on 4/14. 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 5/155:44 pm
BDL
- STL
1 stop7h 37m
Multiple Airlines
Tue 5/196:33 pm
STL
- BDL
2 stops28h 26m
Multiple Airlines
Deal found 4/14![Multiple Airlines logo]()
$224
This Kiwi.com deal was found by Cheapflights users on 4/14. 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 5/155:44 pm
BDL
- STL
1 stop7h 37m
Multiple Airlines
Mon 5/185:27 pm
STL
- BDL
2 stops22h 43m
Multiple Airlines
Deal found 4/14![Multiple Airlines logo]()
$275
This Kiwi.com deal was found by Cheapflights users on 4/13. 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 5/255:44 pm
BDL
- STL
1 stop7h 13m
Multiple Airlines
Tue 5/266:33 pm
STL
- BDL
2 stops23h 19m
Multiple Airlines
Deal found 4/13![Multiple Airlines logo]()
$250
This Kiwi.com deal was found by Cheapflights users on 4/13. 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 5/295:40 pm
BDL
- STL
1 stop7h 17m
Multiple Airlines
Mon 6/111:24 am
STL
- BDL
2 stops10h 25m
Multiple Airlines
Deal found 4/13![Multiple Airlines logo]()
$235
One-way flights from Massachusetts to St. LouisSearch for one-way flight options from Massachusetts to St. Louis. Find affordable one-way fares based on user searches. Data last updated April 18, 2026.
Search for one-way flight options from Massachusetts to St. Louis. Find affordable one-way fares based on user searches. Data last updated April 18, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/15. 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 5/199:31 am
BOS
- STL
1 stop9h 02m
Frontier
Deal found 4/15![Frontier logo]()
$78
This Kiwi.com deal was found by Cheapflights users on 4/13. 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 5/56:00 am
BOS
- STL
1 stop12h 36m
Frontier
Deal found 4/13![Frontier logo]()
$79
This Frontier deal was found by Cheapflights users on 4/13. 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 5/109:31 am
BOS
- STL
1 stop8h 23m
Frontier
Deal found 4/13![Frontier logo]()
$80
This Kiwi.com deal was found by Cheapflights users on 4/14. 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 5/1610:07 am
BOS
- STL
1 stop15h 14m
Frontier
Deal found 4/14![Frontier logo]()
$83
This Kiwi.com deal was found by Cheapflights users on 4/16. 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 5/1312:01 pm
BOS
- STL
1 stop29h 53m
Frontier
Deal found 4/16![Frontier logo]()
$89
This Kiwi.com deal was found by Cheapflights users on 4/17. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/189:12 am
BOS
- STL
1 stop24h 40m
Frontier
Deal found 4/17![Frontier logo]()
$93
This Kiwi.com deal was found by Cheapflights users on 4/13. 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 4/2911:16 am
BOS
- STL
1 stop13h 03m
Frontier
Deal found 4/13![Frontier logo]()
$94
This Kiwi.com deal was found by Cheapflights users on 4/13. 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 4/2911:25 am
BOS
- STL
1 stop12h 54m
Multiple Airlines
Deal found 4/13![Multiple Airlines logo]()
$95
This Kiwi.com deal was found by Cheapflights users on 4/13. 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 4/303:50 pm
BDL
- STL
1 stop16h 00m
Frontier
Deal found 4/13![Frontier logo]()
$116
This Frontier deal was found by Cheapflights users on 4/13. 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 4/231:33 pm
BDL
- STL
1 stop10h 46m
Frontier
Deal found 4/13![Frontier logo]()
$117
This Trip.com deal was found by Cheapflights users on 4/14. 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.
Fri 4/248:42 pm
BDL
- STL
1 stop27h 37m
Frontier
Deal found 4/14![Frontier logo]()
$120
This Kiwi.com deal was found by Cheapflights users on 4/13. 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 5/810:52 am
ALB
- STL
2 stops32h 12m
Multiple Airlines
Deal found 4/13![Multiple Airlines logo]()
$128
Find flight deals from Massachusetts to St. Louis
Keep the following information in mind while searching for Massachusetts to St. Louis flight deals. Data was last updated April 18, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $212 (CheapOair) |
One-way from | $78 (Kiwi.com) |
Popular in | March |
Cheapest in | August |
Average price | $521 |
Good round-trip deal | $400 or less |
Good one-way deal | $198 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Massachusetts 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 April 18, 2026.
Use the filters below to find and compare flights from Massachusetts to St. Louis that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
AlbanySt. Louis
ALB - STL
ALBSTL
Albany Intl
Thu 5/14
5:30 pm-11:40 pm
1 stop7h 10m
Lambert-St Louis
Thu 5/21
5:05 am-6:45 pm
1 stop12h 40m
$340
HartfordSt. Louis
BDL - STL
BDLSTL
Hartford Bradley Intl
Thu 5/21
5:15 pm-11:59 pm
1 stop7h 44m
Lambert-St Louis
Thu 5/28
1:27 pm-9:12 pm
1 stop6h 45m
$351
HartfordSt. Louis
BDL - STL
BDLSTL
Hartford Bradley Intl
Thu 6/4
5:50 am-10:50 am
1 stop6h 00m
Lambert-St Louis
Sat 6/6
9:30 am-4:30 pm
1 stop6h 00m
$351
BostonSt. Louis
BOS - STL
BOSSTL
Boston Logan Intl
Thu 5/28
5:40 am-7:40 am
Nonstop3h 00m
Lambert-St Louis
Thu 6/4
7:55 pm-11:25 pm
Nonstop2h 30m
$353
AlbanySt. Louis
ALB - STL
ALBSTL
Albany Intl
Fri 5/15
2:55 pm-8:55 pm
2 stops7h 00m
Lambert-St Louis
Wed 5/20
3:55 pm-10:50 pm
1 stop5h 55m
$357
AlbanySt. Louis
ALB - STL
ALBSTL
Albany Intl
Tue 5/5
6:00 am-10:28 am
1 stop5h 28m
Lambert-St Louis
Wed 5/6
9:21 am-3:04 pm
1 stop4h 43m
$377
AlbanySt. Louis
ALB - STL
ALBSTL
Albany Intl
Sun 5/10
5:00 am-10:20 am
1 stop6h 20m
Lambert-St Louis
Thu 5/28
2:20 pm-10:20 pm
1 stop7h 00m
$381
AlbanySt. Louis
ALB - STL
ALBSTL
Albany Intl
Fri 5/8
5:50 am-10:50 am
1 stop6h 00m
Lambert-St Louis
Mon 5/11
5:00 am-12:05 pm
1 stop6h 05m
$381
AlbanySt. Louis
ALB - STL
ALBSTL
Albany Intl
Mon 7/13
6:00 am-12:17 pm
1 stop7h 17m
Lambert-St Louis
Tue 7/28
6:04 pm-11:06 pm
1 stop4h 02m
$382
AlbanySt. Louis
ALB - STL
ALBSTL
Albany Intl
Fri 5/15
2:55 pm-8:55 pm
2 stops7h 00m
Lambert-St Louis
Mon 5/18
7:45 pm-7:55 am
1 stop11h 10m
$382
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Massachusetts to St. Louis
Have a flexible travel schedule? Discover the best time to fly to St. Louis from Massachusetts with our price prediction graph.
BDL-STL
BOS-STL
ALB-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 Massachusetts to St. Louis
USMA-STL
BDL-STL
BOS-STL
ALB-STL
What is the cheapest month to book a flight from Massachusetts to St. Louis?
Currently, August is the cheapest month in which you can book a flight from Massachusetts to St. Louis (average of $63). Flying from Massachusetts to St. Louis in March is currently the most expensive (average of $333). 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.
What is the cheapest time of day to fly from MA to STL?
Find hourly flight availability from Massachusetts to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 18, 2026.
When flying from Massachusetts to St. Louis, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 10% versus a flight at noon.
What is the cheapest day to fly from Massachusetts to St. Louis?
Use this chart to determine the cheapest time to fly round-trip from Massachusetts to St. Louis. Price data was last updated on April 11, 2026.
Travelers seeking maximum savings on their Massachusetts to St. Louis flight should consider departing on Thursday evenings when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
How much does it cost to fly round-trip from Massachusetts to St. Louis?
Related info for your journey
Find useful and relevant information for your journey from Massachusetts 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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Alternative routes for Massachusetts to St. Louis
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Complete your trip
Complete your trip to St. Louis by adding a car rental and/or hotel reservation to your travel itinerary.
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Find flights from Massachusetts to St. Louis, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Massachusetts and St. Louis flights
Browse other Massachusetts and St. Louis flight options. Last updated on April 18, 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 April 18, 2026.
Massachusetts to St. Louis flights
Consider these flights traveling from Massachusetts to St. Louis.
Top 7 airlines flying from Massachusetts to St. Louis
Discover the top 7 airlines that operate flights from Massachusetts 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 April 18, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$63 | Average$226 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$90 | Average$255 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$148 | Average$437 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$287 | Average$468 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$292 | Average$443 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$313 | Average$478 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$327 | Average$430 | FlexibilityNo cancel fee | On-time62% |