$91+ 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 8/23. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — STL
Aug 31 — Sep 71
Round-trip
1 adult, Economy
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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
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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Massachusetts to St. Louis
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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 August 1, 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 August 1, 2026.
This Frontier deal was found by Cheapflights users on 7/28. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2912:27 pm
BDL
- STL
1 stop28h 44m
Frontier
Sat 9/55:02 pm
STL
- BDL
1 stop17h 30m
Frontier
Deal found 7/28![Frontier logo]()
$251
This Kiwi.com deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2212:27 pm
BDL
- STL
1 stop28h 44m
Multiple Airlines
Mon 8/316:17 pm
STL
- BDL
2 stops21h 53m
Multiple Airlines
Deal found 7/31![Multiple Airlines logo]()
$271
This Kiwi.com deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/277:00 am
BDL
- STL
2 stops11h 22m
Multiple Airlines
Mon 8/314:23 pm
STL
- BDL
1 stop21h 27m
Multiple Airlines
Deal found 7/31![Multiple Airlines logo]()
$290
This United Airlines deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” 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 9/176:00 am
ALB
- STL
1 stop6h 57m
United Airlines
Sat 9/268:00 am
STL
- ALB
1 stop6h 04m
United Airlines
Deal found 7/30![United Airlines logo]()
$292
This United Airlines deal was found by Cheapflights users on 7/27. 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.
Wed 8/266:00 am
ALB
- STL
1 stop5h 12m
United Airlines
Wed 9/210:53 am
STL
- ALB
1 stop5h 49m
United Airlines
Deal found 7/27![United Airlines logo]()
$297
This Kiwi.com deal was found by Cheapflights users on 7/28. 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.
Sun 9/67:00 am
BDL
- STL
2 stops11h 22m
Multiple Airlines
Sun 9/135:19 pm
STL
- BDL
1 stop19h 59m
Multiple Airlines
Deal found 7/28![Multiple Airlines logo]()
$299
This Southwest deal was found by Cheapflights users on 7/27. 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.
Wed 8/263:05 pm
ALB
- STL
2 stops8h 05m
Southwest
Wed 9/25:55 am
STL
- ALB
1 stop5h 20m
Southwest
Deal found 7/27![Southwest logo]()
$302
This Southwest deal was found by Cheapflights users on 7/27. 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.
Wed 8/266:00 am
ALB
- STL
2 stops7h 10m
Southwest
Tue 9/16:30 am
STL
- ALB
2 stops6h 50m
Southwest
Deal found 7/27![Southwest logo]()
$307
This Southwest deal was found by Cheapflights users on 7/27. 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.
Fri 10/3012:30 pm
ALB
- STL
2 stops7h 35m
Southwest
Tue 11/36:20 am
STL
- ALB
2 stops7h 05m
Southwest
Deal found 7/27![Southwest logo]()
$312
This Southwest deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” 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 9/175:25 am
ALB
- STL
2 stops10h 45m
Southwest
Sat 9/261:15 pm
STL
- ALB
2 stops7h 35m
Southwest
Deal found 7/30![Southwest logo]()
$313
This Kiwi.com deal was found by Cheapflights users on 7/27. 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 8/2812:27 pm
BDL
- STL
1 stop28h 44m
Multiple Airlines
Mon 8/316:17 pm
STL
- BDL
2 stops19h 33m
Multiple Airlines
Deal found 7/27![Multiple Airlines logo]()
$315
This Kiwi.com deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/88:15 am
BDL
- STL
2 stops29h 55m
Multiple Airlines
Thu 9/106:39 pm
STL
- BDL
1 stop18h 39m
Multiple Airlines
Deal found 7/31![Multiple Airlines logo]()
$316
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 August 1, 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 August 1, 2026.
This Delta deal was found by Cheapflights users on 7/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/85:50 am
ALB
- STL
1 stop6h 57m
Delta
Tue 10/135:31 pm
STL
- ALB
1 stop4h 30m
Delta
Deal found 7/28![Delta logo]()
$297
This Southwest deal was found by Cheapflights users on 7/27. 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 9/171:15 pm
ALB
- STL
1 stop6h 10m
Southwest
Sat 9/266:45 am
STL
- ALB
1 stop4h 40m
Southwest
Deal found 7/27![Southwest logo]()
$297
This United Airlines deal was found by Cheapflights users on 7/27. 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.
Wed 8/196:00 am
BDL
- STL
1 stop4h 39m
United Airlines
Sat 8/226:00 am
STL
- BDL
2 stops7h 05m
United Airlines
Deal found 7/27![United Airlines logo]()
$330
This American Airlines deal was found by Cheapflights users on 7/28. 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 8/125:25 pm
MVY
- STL
1 stop5h 03m
American Airlines
Sun 8/165:40 pm
STL
- MVY
1 stop15h 31m
American Airlines
Deal found 7/28![American Airlines logo]()
$635
This Southwest deal was found by Cheapflights users on 7/27. 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 8/271:40 pm
BDL
- STL
1 stop6h 25m
Southwest
Mon 8/316:05 am
STL
- BDL
1 stop5h 55m
Southwest
Deal found 7/27![Southwest logo]()
$325
This United Airlines deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” 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 8/204:50 pm
BDL
- STL
1 stop6h 10m
United Airlines
Sat 8/226:00 am
STL
- BDL
2 stops7h 05m
United Airlines
Deal found 7/29![United Airlines logo]()
$343
This Delta deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” 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 9/49:00 am
BOS
- STL
1 stop7h 38m
Delta
Mon 9/75:23 pm
STL
- BOS
1 stop7h 02m
Delta
Deal found 7/30![Delta logo]()
$370
This Southwest deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” 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 8/253:05 pm
ALB
- STL
2 stops7h 35m
Southwest
Thu 8/276:05 am
STL
- ALB
1 stop4h 05m
Southwest
Deal found 7/29![Southwest logo]()
$339
This Southwest deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” 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 9/1012:40 pm
BOS
- STL
2 stops7h 30m
Southwest
Mon 9/144:15 pm
STL
- BOS
1 stop5h 00m
Southwest
Deal found 7/29![Southwest logo]()
$342
This United Airlines deal was found by Cheapflights users on 7/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/54:15 pm
ALB
- STL
1 stop7h 44m
United Airlines
Wed 9/99:43 am
STL
- ALB
1 stop7h 00m
United Airlines
Deal found 7/28![United Airlines logo]()
$377
This Delta deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” 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 12/112:05 pm
ALB
- STL
1 stop7h 26m
Delta
Sun 12/135:37 pm
STL
- ALB
1 stop5h 17m
Delta
Deal found 7/29![Delta logo]()
$404
This Southwest deal was found by Cheapflights users on 7/28. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/3010:50 am
BOS
- STL
2 stops8h 05m
Southwest
Thu 10/15:50 pm
STL
- BOS
1 stop5h 00m
Southwest
Deal found 7/28![Southwest logo]()
$342
This United Airlines deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/178:40 am
ALB
- STL
1 stop8h 03m
United Airlines
Wed 11/188:30 am
STL
- ALB
1 stop5h 31m
United Airlines
Deal found 7/31![United Airlines logo]()
$405
This Southwest deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” 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 10/110:40 am
BOS
- STL
2 stops8h 25m
Southwest
Sat 10/310:05 am
STL
- BOS
2 stops7h 15m
Southwest
Deal found 7/29![Southwest logo]()
$347
This Southwest deal was found by Cheapflights users on 7/27. 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.
Tue 9/13:05 pm
BDL
- STL
2 stops7h 35m
Southwest
Fri 9/44:15 pm
STL
- BDL
1 stop5h 00m
Southwest
Deal found 7/27![Southwest logo]()
$364
This Southwest deal was found by Cheapflights users on 7/28. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/207:40 am
BOS
- STL
2 stops8h 30m
Southwest
Mon 8/242:45 pm
STL
- BOS
2 stops6h 25m
Southwest
Deal found 7/28![Southwest logo]()
$368
This Southwest deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” 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 9/165:25 am
BOS
- STL
2 stops6h 55m
Southwest
Thu 9/174:15 pm
STL
- BOS
1 stop5h 00m
Southwest
Deal found 7/30![Southwest logo]()
$368
This Southwest deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/85:25 am
BOS
- STL
Nonstop3h 00m
Southwest
Mon 10/195:55 am
STL
- BOS
Nonstop2h 35m
Southwest
Deal found 7/31![Southwest logo]()
$369
This Southwest deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/412:40 pm
BOS
- STL
2 stops7h 30m
Southwest
Sun 9/66:45 am
STL
- BOS
1 stop4h 30m
Southwest
Deal found 7/31![Southwest logo]()
$375
This Southwest deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/225:50 am
BDL
- STL
2 stops8h 35m
Southwest
Mon 8/3110:05 am
STL
- BDL
2 stops6h 35m
Southwest
Deal found 7/31![Southwest logo]()
$391
This Southwest deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/153:20 pm
BOS
- STL
1 stop7h 25m
Southwest
Tue 9/226:30 am
STL
- BOS
2 stops7h 10m
Southwest
Deal found 7/31![Southwest logo]()
$394
This Southwest deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/512:55 pm
BDL
- STL
2 stops7h 10m
Southwest
Sun 11/86:40 am
STL
- BDL
1 stop4h 25m
Southwest
Deal found 7/31![Southwest logo]()
$398
This Southwest deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/198:10 am
BOS
- STL
2 stops6h 15m
Southwest
Sat 9/261:40 pm
STL
- BOS
2 stops7h 05m
Southwest
Deal found 7/31![Southwest logo]()
$399
This Southwest deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/86:00 am
BDL
- STL
2 stops7h 10m
Southwest
Fri 9/1110:10 am
STL
- BDL
2 stops6h 30m
Southwest
Deal found 7/31![Southwest logo]()
$411
This Southwest deal was found by Cheapflights users on 7/28. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2812:35 pm
BDL
- STL
2 stops7h 35m
Southwest
Sun 8/306:15 am
STL
- BDL
2 stops7h 30m
Southwest
Deal found 7/28![Southwest logo]()
$415
This Southwest deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/215:00 pm
BDL
- STL
1 stop6h 05m
Southwest
Sun 8/236:00 am
STL
- BDL
1 stop4h 20m
Southwest
Deal found 7/29![Southwest logo]()
$415
This Southwest deal was found by Cheapflights users on 7/28. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1112:40 pm
BOS
- STL
2 stops7h 30m
Southwest
Sun 9/134:20 pm
STL
- BOS
1 stop6h 20m
Southwest
Deal found 7/28![Southwest logo]()
$424
This Southwest deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” 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 11/68:25 am
BDL
- STL
2 stops8h 35m
Southwest
Sun 11/82:05 pm
STL
- BDL
2 stops7h 10m
Southwest
Deal found 7/29![Southwest logo]()
$427
This Southwest deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” 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 12/1111:45 am
ALB
- STL
2 stops9h 05m
Southwest
Sun 12/1310:15 am
STL
- ALB
2 stops5h 50m
Southwest
Deal found 7/29![Southwest logo]()
$427
This Southwest deal was found by Cheapflights users on 7/28. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/173:10 pm
ALB
- STL
2 stops7h 55m
Southwest
Mon 8/246:05 am
STL
- ALB
1 stop4h 05m
Southwest
Deal found 7/28![Southwest logo]()
$475
Last-minute flights from Massachusetts to St. LouisDiscover last-minute flight deals from Massachusetts to St. Louis. Data last updated August 1, 2026 and is based on user searches.
Discover last-minute flight deals from Massachusetts to St. Louis. Data last updated August 1, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 7/28. 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 8/1510:04 am
BOS
- STL
1 stop14h 55m
Frontier
Mon 8/246:17 pm
STL
- BOS
1 stop16h 30m
Frontier
Deal found 7/28![Frontier logo]()
$328
This Kiwi.com deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.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
Multiple Airlines
Fri 8/286:17 pm
STL
- BDL
2 stops28h 42m
Multiple Airlines
Deal found 7/31![Multiple Airlines logo]()
$329
This Southwest deal was found by Cheapflights users on 7/28. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/195:25 am
BOS
- STL
2 stops7h 45m
Southwest
Wed 8/191:20 pm
STL
- BOS
Nonstop2h 35m
Southwest
Deal found 7/28![Southwest logo]()
$332
This Kiwi.com deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2212:27 pm
BDL
- STL
1 stop28h 44m
Multiple Airlines
Mon 8/316:17 pm
STL
- BDL
2 stops21h 53m
Multiple Airlines
Deal found 7/31![Multiple Airlines logo]()
$271
This United Airlines deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” 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 8/2511:44 am
BDL
- STL
1 stop6h 22m
United Airlines
Tue 9/110:53 am
STL
- BDL
1 stop6h 27m
United Airlines
Deal found 7/29![United Airlines logo]()
$325
This United Airlines deal was found by Cheapflights users on 7/27. 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.
Wed 8/264:00 pm
ALB
- STL
1 stop7h 00m
United Airlines
Tue 9/110:53 am
STL
- ALB
1 stop5h 49m
United Airlines
Deal found 7/27![United Airlines logo]()
$297
This Southwest deal was found by Cheapflights users on 7/27. 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.
Wed 8/263:05 pm
ALB
- STL
2 stops8h 05m
Southwest
Wed 9/25:55 am
STL
- ALB
1 stop5h 20m
Southwest
Deal found 7/27![Southwest logo]()
$302
This Kiwi.com deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/277:00 am
BDL
- STL
2 stops11h 22m
Multiple Airlines
Mon 8/314:23 pm
STL
- BDL
1 stop21h 27m
Multiple Airlines
Deal found 7/31![Multiple Airlines logo]()
$290
This Kiwi.com deal was found by Cheapflights users on 7/27. 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 8/2812:27 pm
BDL
- STL
1 stop28h 44m
Multiple Airlines
Mon 8/316:17 pm
STL
- BDL
2 stops19h 33m
Multiple Airlines
Deal found 7/27![Multiple Airlines logo]()
$315
This American Airlines deal was found by Cheapflights users on 7/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/286:30 pm
ALB
- STL
1 stop6h 04m
American Airlines
Mon 8/316:00 am
STL
- ALB
1 stop7h 23m
American Airlines
Deal found 7/27![American Airlines logo]()
$334
This Frontier deal was found by Cheapflights users on 7/28. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2912:27 pm
BDL
- STL
1 stop28h 44m
Frontier
Sat 9/55:02 pm
STL
- BDL
1 stop17h 30m
Frontier
Deal found 7/28![Frontier logo]()
$251
This Kiwi.com deal was found by Cheapflights users on 7/28. 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 8/2910:04 am
BOS
- STL
1 stop7h 07m
Frontier
Tue 9/15:27 pm
STL
- BOS
2 stops38h 42m
Frontier
Deal found 7/28![Frontier logo]()
$331
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 August 1, 2026.
Search for one-way flight options from Massachusetts to St. Louis. Find affordable one-way fares based on user searches. Data last updated August 1, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/27. 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.
Sun 8/2312:45 pm
BOS
- STL
1 stop29h 37m
Frontier
Deal found 7/27![Frontier logo]()
$91
This Kiwi.com deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” 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 9/2212:52 pm
BOS
- STL
2 stops31h 25m
Frontier
Deal found 7/30![Frontier logo]()
$116
This Priceline deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” 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.
Sat 8/2910:04 am
BOS
- STL
1 stop7h 07m
Frontier
Deal found 7/30![Frontier logo]()
$119
This Kiwi.com deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” 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 9/133:16 pm
BDL
- STL
2 stops22h 54m
Frontier
Deal found 7/30![Frontier logo]()
$121
This Super.com deal was found by Cheapflights users on 8/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/319:36 am
BOS
- STL
1 stop8h 46m
Frontier
Deal found 8/1![Frontier logo]()
$124
This Frontier deal was found by Cheapflights users on 7/27. 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 10/111:17 am
BOS
- STL
1 stop7h 37m
Frontier
Deal found 7/27![Frontier logo]()
$125
This Kiwi.com deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/212:54 pm
BOS
- STL
2 stops31h 23m
Frontier
Deal found 7/31![Frontier logo]()
$130
This Frontier deal was found by Cheapflights users on 8/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2910:11 am
BOS
- STL
1 stop10h 28m
Frontier
Deal found 8/1![Frontier logo]()
$131
This Kiwi.com deal was found by Cheapflights users on 7/27. 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.
Wed 9/21:37 pm
ALB
- STL
2 stops28h 45m
Multiple Airlines
Deal found 7/27![Multiple Airlines logo]()
$133
This Trip.com deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” 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 10/98:55 pm
BDL
- STL
1 stop23h 44m
Frontier
Deal found 7/29![Frontier logo]()
$139
This Kiwi.com deal was found by Cheapflights users on 7/28. 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.
Sun 8/238:10 am
BDL
- STL
2 stops34h 12m
Multiple Airlines
Deal found 7/28![Multiple Airlines logo]()
$141
This Kiwi.com deal was found by Cheapflights users on 7/27. 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.
Sun 9/131:34 pm
BDL
- STL
2 stops24h 36m
Multiple Airlines
Deal found 7/27![Multiple Airlines logo]()
$143
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 August 1, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $251 (Frontier) |
One-way from | $91 (Kiwi.com) |
Popular in | July |
Cheapest in | January |
Average price | $431 |
Good round-trip deal | $369 or less |
Good one-way deal | $244 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 August 1, 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 10/8
5:50 am-11:47 am
1 stop6h 57m
Lambert-St Louis
Tue 10/13
5:31 pm-11:01 pm
1 stop4h 30m
$297
AlbanySt. Louis
ALB - STL
ALBSTL
Albany Intl
Thu 9/17
1:15 pm-6:25 pm
1 stop6h 10m
Lambert-St Louis
Sat 9/26
6:45 am-12:25 pm
1 stop4h 40m
$297
HartfordSt. Louis
BDL - STL
BDLSTL
Hartford Bradley Intl
Thu 8/27
1:40 pm-7:05 pm
1 stop6h 25m
Lambert-St Louis
Mon 8/31
6:05 am-1:00 pm
1 stop5h 55m
$325
HartfordSt. Louis
BDL - STL
BDLSTL
Hartford Bradley Intl
Wed 8/19
6:00 am-9:39 am
1 stop4h 39m
Lambert-St Louis
Sat 8/22
6:00 am-2:05 pm
2 stops7h 05m
$330
AlbanySt. Louis
ALB - STL
ALBSTL
Albany Intl
Tue 8/25
3:05 pm-9:40 pm
2 stops7h 35m
Lambert-St Louis
Thu 8/27
6:05 am-11:10 am
1 stop4h 05m
$339
BostonSt. Louis
BOS - STL
BOSSTL
Boston Logan Intl
Thu 9/10
12:40 pm-7:10 pm
2 stops7h 30m
Lambert-St Louis
Mon 9/14
4:15 pm-10:15 pm
1 stop5h 00m
$342
BostonSt. Louis
BOS - STL
BOSSTL
Boston Logan Intl
Wed 9/30
10:50 am-5:55 pm
2 stops8h 05m
Lambert-St Louis
Thu 10/1
5:50 pm-11:50 pm
1 stop5h 00m
$342
HartfordSt. Louis
BDL - STL
BDLSTL
Hartford Bradley Intl
Thu 8/20
4:50 pm-10:00 pm
1 stop6h 10m
Lambert-St Louis
Sat 8/22
6:00 am-2:05 pm
2 stops7h 05m
$343
BostonSt. Louis
BOS - STL
BOSSTL
Boston Logan Intl
Thu 10/1
10:40 am-6:05 pm
2 stops8h 25m
Lambert-St Louis
Sat 10/3
10:05 am-6:20 pm
2 stops7h 15m
$347
HartfordSt. Louis
BDL - STL
BDLSTL
Hartford Bradley Intl
Tue 9/1
3:05 pm-9:40 pm
2 stops7h 35m
Lambert-St Louis
Fri 9/4
4:15 pm-10:15 pm
1 stop5h 00m
$364
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
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, January is the cheapest month in which you can book a flight from Massachusetts to St. Louis (average of $408). Flying from Massachusetts to St. Louis in July is currently the most expensive (average of $571). 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 August 1, 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 11% versus a flight in the afternoon.
How much does it cost to fly round-trip from Massachusetts to St. Louis?
Airfare is typical for this route at the moment.
Massachusetts to St. Louis flights typically cost between $321 and $567 in August.The cheapest round-trip price found within the last 5 days was $328 on Frontier (Aug 15-Aug 24).
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 July 25, 2026.
Travelers seeking maximum savings on their Massachusetts to St. Louis flight should consider departing on Wednesday at noon 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
Farmington
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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 August 1, 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 August 1, 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 August 1, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$90 | Average$255 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$148 | Average$516 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$298 | Average$506 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$327 | Average$437 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$332 | Average$501 | FlexibilityNo cancel fee | On-time63% |