$123+ Cheap flights from Massachusetts to St. Louis (STL)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/14. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — STL
Nov 14 — Nov 211
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 October 15, 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 October 15, 2026.
This Southwest deal was found by Cheapflights users on 10/14. 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 11/195:20 am -
Nonstop3h 10m
Fri 11/275:45 am -
1 stop4h 25m
Deal found 10/14![Southwest logo]()
$327
This Southwest deal was found by Cheapflights users on 10/13. 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.
Wed 11/45:20 am -
Nonstop3h 10m
Mon 11/94:40 pm -
2 stops6h 15m
Deal found 10/13![Southwest logo]()
$332
This Delta deal was found by Cheapflights users on 10/13. 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.
Fri 11/137:00 pm -
1 stop5h 56m
Tue 11/176:00 pm -
1 stop4h 54m
Deal found 10/13![Delta logo]()
$337
This Kiwi.com deal was found by Cheapflights users on 10/13. 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 11/2611:06 am -
2 stops31h 34m
Wed 12/26:13 pm -
1 stop14h 58m
Deal found 10/13![Frontier logo]()
$348
This United Airlines deal was found by Cheapflights users on 10/13. 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.
Thu 11/269:00 am -
2 stops7h 43m
Tue 12/16:00 am -
1 stop5h 27m
Deal found 10/13![United Airlines logo]()
$351
This American Airlines deal was found by Cheapflights users on 10/10. Clicking the “Pick Dates” 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 11/183:25 pm -
Nonstop3h 22m
Sun 11/225:02 am -
1 stop5h 52m
Deal found 10/10![American Airlines logo]()
$357
This Kiwi.com deal was found by Cheapflights users on 10/12. 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.
Fri 12/1111:08 am -
2 stops24h 49m
Sun 12/136:13 pm -
1 stop15h 00m
Deal found 10/12![Frontier logo]()
$361
This Southwest deal was found by Cheapflights users on 10/10. Clicking the “Pick Dates” 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 11/1810:35 am -
2 stops10h 00m
Sun 11/226:00 am -
Nonstop2h 30m
Deal found 10/10![Southwest logo]()
$362
This CheapOair deal was found by Cheapflights users on 10/14. 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 11/208:36 am -
1 stop10h 04m
Sat 11/211:20 pm -
1 stop19h 51m
Deal found 10/14![Frontier logo]()
$363
This American Airlines deal was found by Cheapflights users on 10/12. 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.
Tue 10/275:16 pm -
1 stop5h 02m
Sat 10/3111:21 am -
1 stop4h 28m
Deal found 10/12![American Airlines logo]()
$492
This Delta deal was found by Cheapflights users on 10/11. 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.
Fri 11/64:10 pm -
1 stop5h 04m
Sun 11/86:00 am -
2 stops8h 27m
Deal found 10/11![Delta logo]()
$503
This Delta deal was found by Cheapflights users on 10/14. 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 10/284:10 pm -
1 stop5h 04m
Sun 11/17:00 am -
2 stops7h 27m
Deal found 10/14![Delta logo]()
$572
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 October 15, 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 October 15, 2026.
This Southwest deal was found by Cheapflights users on 10/14. 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 11/57:45 pm -
1 stop5h 25m
Mon 11/97:55 pm -
Nonstop2h 30m
Deal found 10/14![Southwest logo]()
$327
This United Airlines deal was found by Cheapflights users on 10/13. 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 11/142:40 pm -
2 stops8h 00m
Mon 11/166:00 am -
1 stop5h 26m
Deal found 10/13![United Airlines logo]()
$452
This American Airlines deal was found by Cheapflights users on 10/12. 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.
Tue 10/275:16 pm -
1 stop5h 02m
Sat 10/3111:21 am -
1 stop4h 28m
Deal found 10/12![American Airlines logo]()
$492
This Delta deal was found by Cheapflights users on 10/11. 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.
Fri 11/64:10 pm -
1 stop5h 04m
Sun 11/86:00 am -
2 stops8h 27m
Deal found 10/11![Delta logo]()
$503
This Southwest deal was found by Cheapflights users on 10/14. 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 12/228:05 pm -
1 stop5h 05m
Tue 12/295:00 am -
Nonstop2h 30m
Deal found 10/14![Southwest logo]()
$327
This Southwest deal was found by Cheapflights users on 10/13. 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 11/232:30 pm -
1 stop5h 40m
Fri 11/274:40 pm -
2 stops6h 15m
Deal found 10/13![Southwest logo]()
$406
This Southwest deal was found by Cheapflights users on 10/10. Clicking the “Pick Dates” 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 12/2310:25 pm -
1 stop11h 25m
Sat 12/265:20 am -
1 stop6h 15m
Deal found 10/10![Southwest logo]()
$424
This United Airlines deal was found by Cheapflights users on 10/13. 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 11/135:30 am -
2 stops10h 04m
Sun 11/156:00 am -
1 stop5h 41m
Deal found 10/13![United Airlines logo]()
$516
This Southwest deal was found by Cheapflights users on 10/13. 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.
Tue 11/171:20 pm -
2 stops7h 05m
Fri 11/208:25 am -
1 stop7h 45m
Deal found 10/13![Southwest logo]()
$439
This Delta deal was found by Cheapflights users on 10/14. 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 10/294:10 pm -
2 stops8h 44m
Mon 11/27:00 am -
1 stop7h 27m
Deal found 10/14![Delta logo]()
$622
This Southwest deal was found by Cheapflights users on 10/14. 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.
Wed 12/235:35 am -
Nonstop3h 05m
Sun 12/277:55 pm -
Nonstop2h 30m
Deal found 10/14![Southwest logo]()
$455
This American Airlines deal was found by Cheapflights users on 10/10. Clicking the “Pick Dates” 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.
Sun 10/255:16 pm -
2 stops19h 53m
Thu 10/2911:21 am -
1 stop4h 28m
Deal found 10/10![American Airlines logo]()
$706
This Southwest deal was found by Cheapflights users on 10/12. 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 12/112:25 pm -
2 stops7h 35m
Sun 12/135:15 am -
2 stops8h 15m
Deal found 10/12![Southwest logo]()
$456
This Delta deal was found by Cheapflights users on 10/14. 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 11/194:00 pm -
1 stop5h 30m
Mon 11/307:00 am -
1 stop7h 19m
Deal found 10/14![Delta logo]()
$686
This Southwest deal was found by Cheapflights users on 10/11. 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 12/216:30 am -
2 stops9h 55m
Mon 12/285:05 am -
2 stops8h 15m
Deal found 10/11![Southwest logo]()
$474
Last-minute flights from Massachusetts to St. LouisDiscover last-minute flight deals from Massachusetts to St. Louis. Data last updated October 15, 2026 and is based on user searches.
Discover last-minute flight deals from Massachusetts to St. Louis. Data last updated October 15, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 10/12. 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.
Tue 10/275:16 pm -
1 stop5h 02m
Sat 10/3111:21 am -
1 stop4h 28m
Deal found 10/12![American Airlines logo]()
$492
This Delta deal was found by Cheapflights users on 10/14. 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 10/284:10 pm -
1 stop5h 04m
Sun 11/17:00 am -
2 stops7h 27m
Deal found 10/14![Delta logo]()
$572
This Southwest deal was found by Cheapflights users on 10/13. 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.
Wed 11/45:20 am -
Nonstop3h 10m
Mon 11/94:40 pm -
2 stops6h 15m
Deal found 10/13![Southwest logo]()
$332
This Delta deal was found by Cheapflights users on 10/11. 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.
Fri 11/64:10 pm -
1 stop5h 04m
Sun 11/86:00 am -
2 stops8h 27m
Deal found 10/11![Delta logo]()
$503
This Delta deal was found by Cheapflights users on 10/13. 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.
Fri 11/137:00 pm -
1 stop5h 56m
Tue 11/176:00 pm -
1 stop4h 54m
Deal found 10/13![Delta logo]()
$337
This Kiwi.com deal was found by Cheapflights users on 10/11. 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.
Fri 11/1312:11 pm -
2 stops32h 03m
Mon 11/166:34 pm -
1 stop15h 56m
Deal found 10/11![Multiple Airlines logo]()
$368
This American Airlines deal was found by Cheapflights users on 10/10. Clicking the “Pick Dates” 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 11/183:25 pm -
Nonstop3h 22m
Sun 11/225:02 am -
1 stop5h 52m
Deal found 10/10![American Airlines logo]()
$357
This Southwest deal was found by Cheapflights users on 10/10. Clicking the “Pick Dates” 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 11/1810:35 am -
2 stops10h 00m
Sun 11/226:00 am -
Nonstop2h 30m
Deal found 10/10![Southwest logo]()
$362
This Southwest deal was found by Cheapflights users on 10/14. 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 11/195:20 am -
Nonstop3h 10m
Fri 11/275:45 am -
1 stop4h 25m
Deal found 10/14![Southwest logo]()
$327
This CheapOair deal was found by Cheapflights users on 10/14. 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 11/208:36 am -
1 stop10h 04m
Sat 11/211:20 pm -
1 stop19h 51m
Deal found 10/14![Frontier logo]()
$363
This Kiwi.com deal was found by Cheapflights users on 10/13. 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 11/2611:06 am -
2 stops31h 34m
Thu 12/36:13 pm -
1 stop14h 58m
Deal found 10/13![Frontier logo]()
$348
This United Airlines deal was found by Cheapflights users on 10/13. 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.
Thu 11/269:00 am -
2 stops7h 43m
Tue 12/16:00 am -
1 stop5h 27m
Deal found 10/13![United Airlines logo]()
$351
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 October 15, 2026.
Search for one-way flight options from Massachusetts to St. Louis. Find affordable one-way fares based on user searches. Data last updated October 15, 2026.
This Super.com deal was found by Cheapflights users on 10/13. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/1411:08 am -
1 stop14h 04m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/13![Frontier logo]()
$123
This Frontier deal was found by Cheapflights users on 10/13. 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.
Fri 12/1111:08 am -
1 stop14h 04m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/13![Frontier logo]()
$125
This Super.com deal was found by Cheapflights users on 10/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/2211:06 am -
1 stop26h 19m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/10![Frontier logo]()
$143
This Frontier deal was found by Cheapflights users on 10/10. Clicking the “Pick Dates” 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 12/1211:08 am -
1 stop14h 04m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/10![Frontier logo]()
$145
This Kiwi.com deal was found by Cheapflights users on 10/10. Clicking the “Pick Dates” 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 12/1010:29 am -
2 stops25h 48m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/10![Multiple Airlines logo]()
$149
This American Airlines deal was found by Cheapflights users on 10/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/53:25 pm -
Nonstop3h 22m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/11![American Airlines logo]()
$159
This Super.com deal was found by Cheapflights users on 10/13. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/278:36 am -
1 stop10h 04m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/13![Frontier logo]()
$164
This Frontier deal was found by Cheapflights users on 10/12. 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.
Sat 11/2111:06 am -
1 stop13h 53m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/12![Frontier logo]()
$166
This Southwest deal was found by Cheapflights users on 10/13. 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 11/132:30 pm -
1 stop5h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/13![Southwest logo]()
$169
This Southwest deal was found by Cheapflights users on 10/12. 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.
Tue 11/102:25 pm -
2 stops8h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/12![Southwest logo]()
$174
This Delta deal was found by Cheapflights users on 10/10. Clicking the “Pick Dates” 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 10/274:10 pm -
1 stop5h 04m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/10![Delta logo]()
$306
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 October 15, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $327 (Southwest) |
One-way from | $123 (Super.com) |
Popular in | July |
Cheapest in | January |
Average price | $563 |
Good round-trip deal | $413 or less |
Good one-way deal | $208 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 7,457,451 searches. Data last updated October 15, 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
BostonSt. Louis
BOS Boston Logan Intl - STL Lambert-St Louis
BOSSTL
Boston Logan Intl
Tue 1/12
3:00 pm-8:51 pm
1 stop6h 51m
Lambert-St Louis
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$169
BostonSt. Louis
BOS Boston Logan Intl - STL Lambert-St Louis
BOSSTL
Boston Logan Intl
Mon 1/11
7:10 am-11:20 am
1 stop5h 10m
Lambert-St Louis
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$169
BostonSt. Louis
BOS Boston Logan Intl - STL Lambert-St Louis
BOSSTL
Boston Logan Intl
Fri 11/13
9:00 am-3:54 pm
1 stop7h 54m
Lambert-St Louis
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$169
BostonSt. Louis
BOS Boston Logan Intl - STL Lambert-St Louis
BOSSTL
Boston Logan Intl
Thu 11/12
8:00 am-1:23 pm
1 stop6h 23m
Lambert-St Louis
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$169
Quickest round-trip
BostonSt. Louis
BOS Boston Logan Intl - STL Lambert-St Louis
BOSSTL
Boston Logan Intl
Wed 11/11
4:57 pm-8:29 pm
1 stop4h 32m
Lambert-St Louis
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$169
BostonSt. Louis
BOS Boston Logan Intl - STL Lambert-St Louis
BOSSTL
Boston Logan Intl
Sat 1/9
4:00 pm-8:51 pm
1 stop5h 51m
Lambert-St Louis
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$169
BostonSt. Louis
BOS Boston Logan Intl - STL Lambert-St Louis
BOSSTL
Boston Logan Intl
Tue 11/10
4:00 pm-8:30 pm
1 stop5h 30m
Lambert-St Louis
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$169
BostonSt. Louis
BOS Boston Logan Intl - STL Lambert-St Louis
BOSSTL
Boston Logan Intl
Tue 11/17
4:57 pm-8:29 pm
1 stop4h 32m
Lambert-St Louis
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$169
BostonSt. Louis
BOS Boston Logan Intl - STL Lambert-St Louis
BOSSTL
Boston Logan Intl
Mon 12/14
1:20 pm-7:25 pm
2 stops7h 05m
Lambert-St Louis
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$174
BostonSt. Louis
BOS Boston Logan Intl - STL Lambert-St Louis
BOSSTL
Boston Logan Intl
Mon 11/16
12:49 pm-11:56 pm
2 stops12h 07m
Lambert-St Louis
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$183
Showing 1-10 of 26 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.
BOS-STL
ORH-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
BOS-STL
ORH-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 $413). Flying from Massachusetts to St. Louis in July is currently the most expensive (average of $580). 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 October 15, 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 4% versus a flight at noon.
Weekly flight availability from Massachusetts to St. Louis
Explore weekly flight availability from Massachusetts to St. Louis. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated October 15, 2026.
The most flights from USMA to STL are scheduled on a Monday (7 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (2 on average).
How much does it cost to fly round-trip from Massachusetts to St. Louis?
Airfare is below average for this route at the moment.
Massachusetts to St. Louis flights typically cost between $462 and $694 in November.The cheapest round-trip price found within the last 5 days was $327 on Southwest (Nov 19-Nov 27).
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 53 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 October 10, 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 locationsFairview Heights
O'Fallon
Fenton
Swansea
Eureka
Wentzville
Maryland Heights
Chesterfield
Collinsville
Edwardsville
Glencoe
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Alternative routes for Massachusetts to St. Louis
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Complete your trip
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Search flights from Massachusetts to St. Louis by cabin class
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Massachusetts and St. Louis flights
Browse other Massachusetts and St. Louis flight options. Last updated on October 15, 2026.
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Other flights to St. Louis
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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 7,457,451 searches. Data last updated October 15, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$90 | Average$252 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$148 | Average$555 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$323 | Average$519 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$327 | Average$437 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$339 | Average$525 | FlexibilityNo cancel fee | On-time63% |