$99+ 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 8/11. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — STL
Jul 17 — Jul 241
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Massachusetts 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 Massachusetts to St. Louis
Cheapest
Best
Last-minute
One-way
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 June 17, 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 June 17, 2026.
This Frontier deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” 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.
Mon 8/312:27 pm
BDL
- STL
1 stop12h 32m
Frontier
Tue 8/114:09 pm
STL
- BDL
1 stop17h 27m
Frontier
Deal found 6/12![Frontier logo]()
$239
This CheapOair deal was found by Cheapflights users on 6/13. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/258:10 pm
BDL
- STL
1 stop28h 49m
Frontier
Tue 7/284:09 pm
STL
- BDL
1 stop18h 23m
Frontier
Deal found 6/13![Frontier logo]()
$254
This CheapOair deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” 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.
Wed 7/812:27 pm
BDL
- STL
1 stop12h 32m
Frontier
Sun 7/124:09 pm
STL
- BDL
1 stop18h 23m
Frontier
Deal found 6/12![Frontier logo]()
$259
This American Airlines deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” 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 8/125:00 am
ALB
- STL
1 stop6h 14m
American Airlines
Tue 8/186:00 am
STL
- ALB
1 stop7h 23m
American Airlines
Deal found 6/12![American Airlines logo]()
$296
This American Airlines deal was found by Cheapflights users on 6/15. 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 7/146:29 pm
ALB
- STL
1 stop6h 03m
American Airlines
Wed 7/156:43 am
STL
- ALB
1 stop6h 59m
American Airlines
Deal found 6/15![American Airlines logo]()
$297
This Booking.com deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/2412:27 pm
BDL
- STL
1 stop12h 32m
Frontier
Tue 7/284:09 pm
STL
- BDL
1 stop18h 23m
Frontier
Deal found 6/12![Frontier logo]()
$299
This CheapOair deal was found by Cheapflights users on 6/16. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/2012:27 pm
BDL
- STL
1 stop12h 32m
Frontier
Fri 7/244:09 pm
STL
- BDL
1 stop26h 16m
Frontier
Deal found 6/16![Frontier logo]()
$316
This Delta deal was found by Cheapflights users on 6/13. 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.
Tue 7/215:30 am
BDL
- STL
1 stop5h 01m
Delta
Tue 7/213:58 pm
STL
- BDL
1 stop6h 56m
Delta
Deal found 6/13![Delta logo]()
$317
This Booking.com deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/158:10 pm
BDL
- STL
1 stop28h 49m
Frontier
Tue 8/184:10 pm
STL
- BDL
1 stop18h 28m
Frontier
Deal found 6/12![Frontier logo]()
$319
This Delta deal was found by Cheapflights users on 6/14. 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.
Wed 8/126:15 am
ALB
- STL
1 stop6h 31m
Delta
Sat 8/155:23 pm
STL
- ALB
1 stop5h 34m
Delta
Deal found 6/14![Delta logo]()
$319
This Southwest deal was found by Cheapflights users on 6/14. 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.
Tue 7/1411:40 am
BDL
- STL
2 stops7h 45m
Southwest
Tue 7/215:40 am
STL
- BDL
1 stop4h 20m
Southwest
Deal found 6/14![Southwest logo]()
$322
This CheapOair deal was found by Cheapflights users on 6/13. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/258:10 pm
BDL
- STL
1 stop28h 49m
Frontier
Fri 7/314:09 pm
STL
- BDL
1 stop26h 16m
Frontier
Deal found 6/13![Frontier logo]()
$323
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 June 17, 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 June 17, 2026.
This Delta deal was found by Cheapflights users on 6/14. 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.
Wed 8/126:15 am
ALB
- STL
1 stop6h 31m
Delta
Sat 8/155:23 pm
STL
- ALB
1 stop5h 34m
Delta
Deal found 6/14![Delta logo]()
$319
This Southwest deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” 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 7/35:35 am
BOS
- STL
Nonstop2h 50m
Southwest
Wed 7/83:10 pm
STL
- BOS
1 stop7h 25m
Southwest
Deal found 6/12![Southwest logo]()
$384
This United Airlines deal was found by Cheapflights users on 6/16. 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.
Wed 8/122:49 pm
ALB
- STL
2 stops9h 49m
United Airlines
Sat 8/1512:59 pm
STL
- ALB
1 stop7h 37m
United Airlines
Deal found 6/16![United Airlines logo]()
$444
This Delta deal was found by Cheapflights users on 6/13. 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.
Sat 7/47:00 am
BOS
- STL
1 stop7h 33m
Delta
Sat 7/45:36 pm
STL
- BOS
1 stop6h 55m
Delta
Deal found 6/13![Delta logo]()
$357
This Delta deal was found by Cheapflights users on 6/14. 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.
Tue 7/285:30 am
BDL
- STL
1 stop5h 01m
Delta
Sun 8/26:30 am
STL
- BDL
1 stop4h 43m
Delta
Deal found 6/14![Delta logo]()
$362
This Southwest deal was found by Cheapflights users on 6/16. 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.
Tue 7/1411:40 am
BDL
- STL
2 stops7h 45m
Southwest
Mon 7/204:35 pm
STL
- BDL
2 stops6h 45m
Southwest
Deal found 6/16![Southwest logo]()
$403
This Delta deal was found by Cheapflights users on 6/15. 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.
Mon 7/136:54 pm
ALB
- STL
1 stop5h 59m
Delta
Tue 7/2810:51 am
STL
- ALB
1 stop6h 08m
Delta
Deal found 6/15![Delta logo]()
$362
This Southwest deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” 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 7/317:10 pm
BDL
- STL
1 stop4h 45m
Southwest
Mon 8/35:50 am
STL
- BDL
1 stop7h 20m
Southwest
Deal found 6/12![Southwest logo]()
$407
This United Airlines deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/286:00 am
BDL
- STL
2 stops10h 46m
United Airlines
Sun 8/26:00 am
STL
- BDL
1 stop7h 24m
United Airlines
Deal found 6/12![United Airlines logo]()
$472
This Southwest deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/35:00 am
BOS
- STL
Nonstop2h 50m
Southwest
Mon 9/77:00 am
STL
- BOS
Nonstop2h 35m
Southwest
Deal found 6/12![Southwest logo]()
$410
This Delta deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” 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 7/226:00 pm
BDL
- STL
1 stop5h 15m
Delta
Mon 7/273:58 pm
STL
- BDL
1 stop6h 56m
Delta
Deal found 6/12![Delta logo]()
$394
This United Airlines deal was found by Cheapflights users on 6/16. 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.
Sun 8/26:10 am
ALB
- STL
1 stop7h 01m
United Airlines
Sat 8/81:18 pm
STL
- ALB
2 stops9h 29m
United Airlines
Deal found 6/16![United Airlines logo]()
$503
This Delta deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” 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 7/167:10 pm
BDL
- STL
1 stop5h 43m
Delta
Sat 7/186:30 am
STL
- BDL
1 stop4h 45m
Delta
Deal found 6/11![Delta logo]()
$394
This Southwest deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” 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 7/1612:40 pm
BDL
- STL
2 stops6h 50m
Southwest
Sat 7/183:45 pm
STL
- BDL
2 stops6h 40m
Southwest
Deal found 6/11![Southwest logo]()
$437
This Southwest deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” 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 7/235:55 pm
ALB
- STL
2 stops7h 45m
Southwest
Sun 7/268:55 pm
STL
- ALB
1 stop11h 20m
Southwest
Deal found 6/12![Southwest logo]()
$444
This Delta deal was found by Cheapflights users on 6/13. 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.
Tue 7/216:00 pm
BDL
- STL
1 stop5h 15m
Delta
Fri 7/246:09 pm
STL
- BDL
1 stop4h 05m
Delta
Deal found 6/13![Delta logo]()
$416
This Southwest deal was found by Cheapflights users on 6/15. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/144:15 pm
ALB
- STL
2 stops7h 50m
Southwest
Wed 7/155:40 am
STL
- ALB
2 stops7h 50m
Southwest
Deal found 6/15![Southwest logo]()
$449
This Delta deal was found by Cheapflights users on 6/14. 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.
Sun 8/27:00 am
ALB
- STL
1 stop5h 47m
Delta
Sat 8/86:09 pm
STL
- ALB
1 stop3h 56m
Delta
Deal found 6/14![Delta logo]()
$440
This Southwest deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” 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 9/45:40 am
BOS
- STL
1 stop9h 25m
Southwest
Mon 9/76:55 pm
STL
- BOS
Nonstop2h 35m
Southwest
Deal found 6/12![Southwest logo]()
$471
This Delta deal was found by Cheapflights users on 6/15. 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.
Thu 7/211:41 am
BDL
- STL
1 stop7h 26m
Delta
Mon 7/66:10 pm
STL
- BDL
1 stop4h 25m
Delta
Deal found 6/15![Delta logo]()
$457
This Southwest deal was found by Cheapflights users on 6/13. 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 9/276:10 am
ALB
- STL
2 stops7h 50m
Southwest
Sun 9/273:30 pm
STL
- ALB
1 stop6h 45m
Southwest
Deal found 6/13![Southwest logo]()
$478
This Southwest deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” 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 7/105:35 am
BOS
- STL
Nonstop2h 50m
Southwest
Fri 7/177:55 pm
STL
- BOS
Nonstop2h 35m
Southwest
Deal found 6/11![Southwest logo]()
$489
This Delta deal was found by Cheapflights users on 6/16. 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.
Wed 6/248:05 am
BOS
- STL
1 stop7h 47m
Delta
Sat 6/275:24 pm
STL
- BOS
1 stop7h 07m
Delta
Deal found 6/16![Delta logo]()
$491
This Southwest deal was found by Cheapflights users on 6/13. 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 7/233:55 pm
BOS
- STL
2 stops6h 05m
Southwest
Sun 7/263:50 pm
STL
- BOS
2 stops8h 05m
Southwest
Deal found 6/13![Southwest logo]()
$491
This Southwest deal was found by Cheapflights users on 6/15. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/139:40 am
BOS
- STL
2 stops6h 30m
Southwest
Sun 8/1610:05 am
STL
- BOS
2 stops9h 20m
Southwest
Deal found 6/15![Southwest logo]()
$491
This Southwest deal was found by Cheapflights users on 6/16. 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.
Sat 7/115:50 am
BOS
- STL
Nonstop2h 55m
Southwest
Mon 7/132:30 pm
STL
- BOS
Nonstop2h 35m
Southwest
Deal found 6/16![Southwest logo]()
$494
This Southwest deal was found by Cheapflights users on 6/14. 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 7/311:35 am
BOS
- STL
1 stop8h 10m
Southwest
Sun 7/56:45 pm
STL
- BOS
1 stop4h 25m
Southwest
Deal found 6/14![Southwest logo]()
$494
This Southwest deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” 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 7/65:35 am
BOS
- STL
Nonstop2h 50m
Southwest
Fri 7/107:55 pm
STL
- BOS
Nonstop2h 35m
Southwest
Deal found 6/11![Southwest logo]()
$517
This Delta deal was found by Cheapflights users on 6/16. 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.
Sat 6/2711:42 am
MVY
- STL
1 stop5h 08m
Delta
Sun 6/286:00 am
STL
- MVY
2 stops8h 01m
Delta
Deal found 6/16![Delta logo]()
$833
Last-minute flights from Massachusetts to St. LouisDiscover last-minute flight deals from Massachusetts to St. Louis. Data last updated June 17, 2026 and is based on user searches.
Discover last-minute flight deals from Massachusetts to St. Louis. Data last updated June 17, 2026 and is based on user searches.
This CheapOair deal was found by Cheapflights users on 6/16. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/312:38 pm
BDL
- STL
1 stop12h 11m
Frontier
Sun 7/54:09 pm
STL
- BDL
1 stop18h 23m
Frontier
Deal found 6/16![Frontier logo]()
$339
This Southwest deal was found by Cheapflights users on 6/16. 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.
Tue 7/711:40 am
BDL
- STL
2 stops7h 45m
Southwest
Tue 7/145:40 am
STL
- BDL
1 stop4h 20m
Southwest
Deal found 6/16![Southwest logo]()
$343
This CheapOair deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” 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.
Wed 7/812:27 pm
BDL
- STL
1 stop12h 32m
Frontier
Sun 7/124:09 pm
STL
- BDL
1 stop18h 23m
Frontier
Deal found 6/12![Frontier logo]()
$259
This Kiwi.com deal was found by Cheapflights users on 6/15. 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.
Thu 7/98:00 am
BDL
- STL
2 stops25h 57m
Multiple Airlines
Tue 7/144:09 pm
STL
- BDL
1 stop18h 23m
Multiple Airlines
Deal found 6/15![Multiple Airlines logo]()
$346
This American Airlines deal was found by Cheapflights users on 6/15. 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 7/146:29 pm
ALB
- STL
1 stop6h 03m
American Airlines
Wed 7/156:43 am
STL
- ALB
1 stop6h 59m
American Airlines
Deal found 6/15![American Airlines logo]()
$297
This Southwest deal was found by Cheapflights users on 6/14. 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.
Tue 7/1411:40 am
BDL
- STL
2 stops7h 45m
Southwest
Tue 7/215:40 am
STL
- BDL
1 stop4h 20m
Southwest
Deal found 6/14![Southwest logo]()
$322
This Southwest deal was found by Cheapflights users on 6/16. 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.
Wed 7/1511:35 am
BOS
- STL
2 stops7h 50m
Southwest
Tue 7/213:15 pm
STL
- BOS
2 stops7h 10m
Southwest
Deal found 6/16![Southwest logo]()
$347
This CheapOair deal was found by Cheapflights users on 6/16. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/2012:27 pm
BDL
- STL
1 stop12h 32m
Frontier
Fri 7/244:09 pm
STL
- BDL
1 stop26h 16m
Frontier
Deal found 6/16![Frontier logo]()
$316
This Delta deal was found by Cheapflights users on 6/13. 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.
Tue 7/216:00 pm
BDL
- STL
1 stop5h 15m
Delta
Wed 7/223:58 pm
STL
- BDL
1 stop6h 56m
Delta
Deal found 6/13![Delta logo]()
$317
This Booking.com deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/2412:27 pm
BDL
- STL
1 stop12h 32m
Frontier
Tue 7/284:09 pm
STL
- BDL
1 stop18h 23m
Frontier
Deal found 6/12![Frontier logo]()
$299
This CheapOair deal was found by Cheapflights users on 6/13. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/258:10 pm
BDL
- STL
1 stop28h 49m
Frontier
Tue 7/284:09 pm
STL
- BDL
1 stop18h 23m
Frontier
Deal found 6/13![Frontier logo]()
$254
This CheapOair deal was found by Cheapflights users on 6/13. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/258:10 pm
BDL
- STL
1 stop28h 49m
Frontier
Fri 7/314:09 pm
STL
- BDL
1 stop26h 16m
Frontier
Deal found 6/13![Frontier logo]()
$323
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 June 17, 2026.
Search for one-way flight options from Massachusetts to St. Louis. Find affordable one-way fares based on user searches. Data last updated June 17, 2026.
This Kiwi.com deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” 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 8/1111:59 am
BOS
- STL
1 stop6h 38m
Frontier
Deal found 6/11![Frontier logo]()
$99
This Trip.com deal was found by Cheapflights users on 6/13. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/186:00 am
BOS
- STL
1 stop12h 30m
Frontier
Deal found 6/13![Frontier logo]()
$101
This Kiwi.com deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” 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 9/89:12 am
BOS
- STL
1 stop25h 28m
Frontier
Deal found 6/12![Frontier logo]()
$107
This Super.com deal was found by Cheapflights users on 6/15. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/810:04 am
BOS
- STL
1 stop14h 55m
Frontier
Deal found 6/15![Frontier logo]()
$120
This Expedia deal was found by Cheapflights users on 6/14. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/1512:27 pm
BDL
- STL
1 stop12h 32m
Frontier
Deal found 6/14![Frontier logo]()
$121
This Trip.com deal was found by Cheapflights users on 6/14. 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.
Wed 7/1510:04 am
BOS
- STL
1 stop14h 55m
Frontier
Deal found 6/14![Frontier logo]()
$124
This Kiwi.com deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” 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 7/1112:56 pm
BOS
- STL
1 stop29h 41m
Frontier
Deal found 6/12![Frontier logo]()
$127
This Kiwi.com deal was found by Cheapflights users on 6/15. 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.
Wed 9/91:00 pm
BOS
- STL
1 stop21h 40m
Frontier
Deal found 6/15![Frontier logo]()
$128
This Priceline deal was found by Cheapflights users on 6/16. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/1311:59 am
BOS
- STL
1 stop6h 38m
Frontier
Deal found 6/16![Frontier logo]()
$129
This Super.com deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” 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 7/911:52 am
BOS
- STL
1 stop6h 45m
Frontier
Deal found 6/12![Frontier logo]()
$134
This Expedia deal was found by Cheapflights users on 6/14. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/1012:27 pm
BDL
- STL
1 stop12h 32m
Frontier
Deal found 6/14![Frontier logo]()
$141
This Delta deal was found by Cheapflights users on 6/16. 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.
Wed 7/295:45 am
ALB
- STL
1 stop7h 02m
Delta
Deal found 6/16![Delta logo]()
$149
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 June 17, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $239 (Frontier) |
One-way from | $99 (Kiwi.com) |
Popular in | July |
Cheapest in | August |
Average price | $525 |
Good round-trip deal | $403 or less |
Good one-way deal | $213 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 June 17, 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
Wed 8/12
6:15 am-11:46 am
1 stop6h 31m
Lambert-St Louis
Sat 8/15
5:23 pm-11:57 pm
1 stop5h 34m
$319
BostonSt. Louis
BOS - STL
BOSSTL
Boston Logan Intl
Sat 7/4
7:00 am-1:33 pm
1 stop7h 33m
Lambert-St Louis
Sat 7/4
5:36 pm-1:31 am
1 stop6h 55m
$357
HartfordSt. Louis
BDL - STL
BDLSTL
Hartford Bradley Intl
Tue 7/28
5:30 am-9:31 am
1 stop5h 01m
Lambert-St Louis
Sun 8/2
6:30 am-12:13 pm
1 stop4h 43m
$362
AlbanySt. Louis
ALB - STL
ALBSTL
Albany Intl
Mon 7/13
6:54 pm-11:53 pm
1 stop5h 59m
Lambert-St Louis
Tue 7/28
10:51 am-5:59 pm
1 stop6h 08m
$362
BostonSt. Louis
BOS - STL
BOSSTL
Boston Logan Intl
Fri 7/3
5:35 am-7:25 am
Nonstop2h 50m
Lambert-St Louis
Wed 7/8
3:10 pm-11:35 pm
1 stop7h 25m
$384
HartfordSt. Louis
BDL - STL
BDLSTL
Hartford Bradley Intl
Wed 7/22
6:00 pm-10:15 pm
1 stop5h 15m
Lambert-St Louis
Mon 7/27
3:58 pm-11:54 pm
1 stop6h 56m
$394
HartfordSt. Louis
BDL - STL
BDLSTL
Hartford Bradley Intl
Thu 7/16
7:10 pm-11:53 pm
1 stop5h 43m
Lambert-St Louis
Sat 7/18
6:30 am-12:15 pm
1 stop4h 45m
$394
HartfordSt. Louis
BDL - STL
BDLSTL
Hartford Bradley Intl
Tue 7/14
11:40 am-6:25 pm
2 stops7h 45m
Lambert-St Louis
Mon 7/20
4:35 pm-12:20 am
2 stops6h 45m
$403
HartfordSt. Louis
BDL - STL
BDLSTL
Hartford Bradley Intl
Fri 7/31
7:10 pm-10:55 pm
1 stop4h 45m
Lambert-St Louis
Mon 8/3
5:50 am-2:10 pm
1 stop7h 20m
$407
Quickest round-trip
BostonSt. Louis
BOS - STL
BOSSTL
Boston Logan Intl
Thu 9/3
5:00 am-6:50 am
Nonstop2h 50m
Lambert-St Louis
Mon 9/7
7:00 am-10:35 am
Nonstop2h 35m
$410
Showing 1-10 of 58 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
ALB-STL
BOS-STL
MVY-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
ALB-STL
BOS-STL
MVY-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 June 17, 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 8% versus a flight at noon.
How much does it cost to fly round-trip from Massachusetts to St. Louis?
How far ahead should I book a flight from Massachusetts to St. Louis?
The best time to book flights from Massachusetts to St. Louis is 74 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
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 June 13, 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.
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
Eureka
Maryland Heights
Collinsville
Wentzville
Glencoe
Chesterfield
Alton
Farmington
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 Massachusetts 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 Massachusetts to St. Louis by cabin class
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 June 17, 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 June 17, 2026.
Massachusetts to St. Louis flights
Consider these flights traveling from Massachusetts to St. Louis.
Top 5 airlines flying from Massachusetts to St. Louis
Discover the top 5 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 June 17, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$90 | Average$252 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$148 | Average$516 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$286 | Average$492 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$316 | Average$487 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$327 | Average$430 | FlexibilityNo cancel fee | On-time62% |