$125+ 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
Oct 30 — Nov 61
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 September 30, 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 September 30, 2026.
This Delta deal was found by Cheapflights users on 9/28. 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.
Tue 11/104:00 pm -
1 stop5h 30m
Mon 11/1610:00 am -
1 stop4h 19m
Deal found 9/28![Delta logo]()
$332
This Southwest deal was found by Cheapflights users on 9/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/205:35 am -
1 stop7h 00m
Tue 11/32:20 pm -
2 stops6h 30m
Deal found 9/26![Southwest logo]()
$342
This American Airlines deal was found by Cheapflights users on 9/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2710:29 am -
1 stop8h 47m
Fri 10/306:10 pm -
Nonstop2h 47m
Deal found 9/25![American Airlines logo]()
$346
This Southwest deal was found by Cheapflights users on 9/29. 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 10/235:25 am -
Nonstop3h 00m
Mon 10/267:55 pm -
Nonstop2h 40m
Deal found 9/29![Southwest logo]()
$347
This Frontier deal was found by Cheapflights users on 9/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/238:36 am -
1 stop10h 04m
Fri 11/276:35 pm -
1 stop12h 06m
Deal found 9/25![Frontier logo]()
$349
This CheapOair deal was found by Cheapflights users on 9/27. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/2311:47 am -
1 stop12h 26m
Sat 10/244:30 pm -
1 stop17h 32m
Deal found 9/27![Frontier logo]()
$353
This Kiwi.com deal was found by Cheapflights users on 9/28. 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.
Tue 10/2012:57 pm -
1 stop29h 43m
Fri 10/306:44 pm -
1 stop14h 48m
Deal found 9/28![Frontier logo]()
$356
This American Airlines deal was found by Cheapflights users on 9/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/237:15 am -
Nonstop3h 14m
Mon 10/261:30 pm -
1 stop5h 03m
Deal found 9/29![American Airlines logo]()
$357
This CheapOair deal was found by Cheapflights users on 9/29. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/2011:06 am -
1 stop26h 19m
Sat 11/215:59 pm -
1 stop15h 12m
Deal found 9/29![Frontier logo]()
$359
This Southwest deal was found by Cheapflights users on 9/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/52:25 pm -
2 stops7h 35m
Fri 11/67:55 pm -
Nonstop2h 30m
Deal found 9/25![Southwest logo]()
$362
This Southwest deal was found by Cheapflights users on 9/29. 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.
Wed 11/2510:25 pm -
1 stop9h 30m
Thu 11/261:05 pm -
Nonstop2h 25m
Deal found 9/29![Southwest logo]()
$363
This CheapOair deal was found by Cheapflights users on 9/29. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/2411:47 am -
1 stop12h 26m
Sun 10/254:30 pm -
1 stop17h 32m
Deal found 9/29![Frontier logo]()
$366
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 September 30, 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 September 30, 2026.
This Delta deal was found by Cheapflights users on 9/28. 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.
Tue 11/104:00 pm -
1 stop5h 30m
Mon 11/166:00 am -
2 stops8h 19m
Deal found 9/28![Delta logo]()
$342
This Southwest deal was found by Cheapflights users on 9/27. 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 11/181:10 pm -
Nonstop3h 10m
Sat 11/218:10 am -
Nonstop2h 30m
Deal found 9/27![Southwest logo]()
$347
This United Airlines deal was found by Cheapflights users on 9/28. 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.
Thu 11/57:31 am -
1 stop8h 03m
Mon 11/96:00 am -
2 stops7h 32m
Deal found 9/28![United Airlines logo]()
$452
This Delta deal was found by Cheapflights users on 9/28. 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.
Wed 11/114:00 pm -
2 stops8h 22m
Mon 11/167:00 am -
1 stop7h 19m
Deal found 9/28![Delta logo]()
$342
This Southwest deal was found by Cheapflights users on 9/27. 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 10/225:25 am -
Nonstop3h 00m
Tue 10/276:40 am -
Nonstop2h 35m
Deal found 9/27![Southwest logo]()
$407
This United Airlines deal was found by Cheapflights users on 9/29. 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 11/36:00 am -
1 stop7h 10m
Thu 11/56:00 am -
2 stops7h 32m
Deal found 9/29![United Airlines logo]()
$452
This Delta deal was found by Cheapflights users on 9/28. 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.
Tue 11/104:00 pm -
1 stop5h 30m
Sun 11/157:00 am -
1 stop7h 23m
Deal found 9/28![Delta logo]()
$412
This Southwest deal was found by Cheapflights users on 9/29. 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.
Sun 11/1512:55 pm -
Nonstop3h 00m
Mon 11/237:55 pm -
Nonstop2h 30m
Deal found 9/29![Southwest logo]()
$414
This United Airlines deal was found by Cheapflights users on 9/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/299:00 am -
2 stops7h 43m
Mon 11/29:59 am -
1 stop4h 51m
Deal found 9/25![United Airlines logo]()
$452
This Delta deal was found by Cheapflights users on 9/28. 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.
Wed 11/114:00 pm -
2 stops8h 56m
Sun 11/157:13 am -
2 stops7h 10m
Deal found 9/28![Delta logo]()
$427
This Southwest deal was found by Cheapflights users on 9/28. 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 11/122:30 pm -
1 stop5h 40m
Sun 11/154:40 pm -
2 stops6h 15m
Deal found 9/28![Southwest logo]()
$439
This United Airlines deal was found by Cheapflights users on 9/27. 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.
Mon 11/2312:00 pm -
2 stops8h 23m
Fri 11/275:34 pm -
1 stop6h 12m
Deal found 9/27![United Airlines logo]()
$482
This Southwest deal was found by Cheapflights users on 9/27. 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 11/246:30 am -
2 stops9h 55m
Fri 11/274:30 pm -
1 stop6h 15m
Deal found 9/27![Southwest logo]()
$454
This United Airlines deal was found by Cheapflights users on 9/29. 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 12/295:45 am -
1 stop5h 57m
Fri 1/18:05 am -
2 stops9h 22m
Deal found 9/29![United Airlines logo]()
$482
This Delta deal was found by Cheapflights users on 9/29. 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.
Tue 11/244:00 pm -
1 stop5h 30m
Sat 11/286:40 am -
2 stops7h 39m
Deal found 9/29![Delta logo]()
$1,354
Last-minute flights from Massachusetts to St. LouisDiscover last-minute flight deals from Massachusetts to St. Louis. Data last updated September 30, 2026 and is based on user searches.
Discover last-minute flight deals from Massachusetts to St. Louis. Data last updated September 30, 2026 and is based on user searches.
This Southwest deal was found by Cheapflights users on 9/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/205:35 am -
1 stop7h 00m
Tue 11/32:20 pm -
2 stops6h 30m
Deal found 9/26![Southwest logo]()
$342
This Kiwi.com deal was found by Cheapflights users on 9/28. 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.
Tue 10/2012:57 pm -
1 stop29h 43m
Fri 10/306:44 pm -
1 stop14h 48m
Deal found 9/28![Frontier logo]()
$356
This Kiwi.com deal was found by Cheapflights users on 9/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2212:34 pm -
2 stops30h 06m
Mon 10/266:35 pm -
1 stop14h 42m
Deal found 9/25![Multiple Airlines logo]()
$369
This CheapOair deal was found by Cheapflights users on 9/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2211:47 am -
1 stop12h 26m
Sun 10/254:30 pm -
1 stop17h 32m
Deal found 9/25![Frontier logo]()
$370
This Southwest deal was found by Cheapflights users on 9/29. 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 10/235:25 am -
Nonstop3h 00m
Mon 10/267:55 pm -
Nonstop2h 40m
Deal found 9/29![Southwest logo]()
$347
This CheapOair deal was found by Cheapflights users on 9/27. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/2311:47 am -
1 stop12h 26m
Sat 10/244:30 pm -
1 stop17h 32m
Deal found 9/27![Frontier logo]()
$353
This American Airlines deal was found by Cheapflights users on 9/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/237:15 am -
Nonstop3h 14m
Mon 10/261:30 pm -
1 stop5h 03m
Deal found 9/29![American Airlines logo]()
$357
This Delta deal was found by Cheapflights users on 9/28. 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.
Fri 10/232:00 pm -
1 stop7h 14m
Sat 10/242:25 pm -
1 stop8h 09m
Deal found 9/28![Delta logo]()
$367
This CheapOair deal was found by Cheapflights users on 9/27. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/2311:47 am -
1 stop12h 26m
Sun 10/254:30 pm -
1 stop17h 32m
Deal found 9/27![Frontier logo]()
$368
This CheapOair deal was found by Cheapflights users on 9/29. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/2411:47 am -
1 stop12h 26m
Sun 10/254:30 pm -
1 stop17h 32m
Deal found 9/29![Frontier logo]()
$366
This American Airlines deal was found by Cheapflights users on 9/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2710:29 am -
1 stop8h 47m
Fri 10/306:10 pm -
Nonstop2h 47m
Deal found 9/25![American Airlines logo]()
$346
This Southwest deal was found by Cheapflights users on 9/27. 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 10/301:05 pm -
2 stops7h 00m
Tue 11/36:10 pm -
Nonstop2h 30m
Deal found 9/27![Southwest logo]()
$362
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 September 30, 2026.
Search for one-way flight options from Massachusetts to St. Louis. Find affordable one-way fares based on user searches. Data last updated September 30, 2026.
This Frontier deal was found by Cheapflights users on 9/29. 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 Frontier 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 9/29![Frontier logo]()
$125
This Frontier deal was found by Cheapflights users on 9/29. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2611:47 am -
1 stop12h 26m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/29![Frontier logo]()
$145
This American Airlines deal was found by Cheapflights users on 9/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/147:00 am -
Nonstop3h 29m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/29![American Airlines logo]()
$159
This Kiwi.com deal was found by Cheapflights users on 9/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2012:57 pm -
1 stop29h 43m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/29![Frontier logo]()
$160
This American Airlines deal was found by Cheapflights users on 9/28. 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.
Tue 10/2710:29 am -
1 stop8h 47m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/28![American Airlines logo]()
$163
This Frontier deal was found by Cheapflights users on 9/27. 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.
Fri 10/2311:47 am -
1 stop12h 26m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/27![Frontier logo]()
$166
This American Airlines deal was found by Cheapflights users on 9/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/2112:39 pm -
1 stop7h 59m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/29![American Airlines logo]()
$169
This Frontier deal was found by Cheapflights users on 9/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/308:36 am -
1 stop10h 04m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/25![Frontier logo]()
$171
This Kiwi.com deal was found by Cheapflights users on 9/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/1512:34 pm -
2 stops30h 06m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/25![Multiple Airlines logo]()
$172
This Southwest deal was found by Cheapflights users on 9/28. 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 11/161:20 pm -
2 stops7h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/28![Southwest logo]()
$174
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 September 30, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $332 (Delta) |
One-way from | $125 (Frontier) |
Popular in | July |
Cheapest in | January |
Average price | $511 |
Good round-trip deal | $392 or less |
Good one-way deal | $188 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 September 30, 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 12/15
5:20 am-7:30 am
Nonstop3h 10m
Lambert-St Louis
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$159
BostonSt. Louis
BOS Boston Logan Intl - STL Lambert-St Louis
BOSSTL
Boston Logan Intl
Wed 10/28
5:30 am-10:51 am
1 stop6h 21m
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
Wed 12/2
8:00 am-1:28 pm
1 stop6h 28m
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 11/3
6:50 am-1:39 pm
1 stop7h 49m
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 12/1
11:20 am-7:25 pm
2 stops9h 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
Fri 11/13
6:00 am-10:32 am
1 stop5h 32m
Lambert-St Louis
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$199
BostonSt. Louis
BOS Boston Logan Intl - STL Lambert-St Louis
BOSSTL
Boston Logan Intl
Fri 12/25
9:05 am-4:03 pm
1 stop7h 58m
Lambert-St Louis
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$199
BostonSt. Louis
BOS Boston Logan Intl - STL Lambert-St Louis
BOSSTL
Boston Logan Intl
Thu 10/29
6:00 am-4:59 pm
3 stops11h 59m
Lambert-St Louis
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$234
BostonSt. Louis
BOS Boston Logan Intl - STL Lambert-St Louis
BOSSTL
Boston Logan Intl
Tue 10/20
6:00 am-3:43 pm
3 stops10h 43m
Lambert-St Louis
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$234
BostonSt. Louis
BOS Boston Logan Intl - STL Lambert-St Louis
BOSSTL
Boston Logan Intl
Sat 3/27
5:45 am-10:48 am
1 stop6h 03m
Lambert-St Louis
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$251
Showing 1-10 of 27 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.
ORH-STL
BOS-STL
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Massachusetts to St. Louis
USMA-STL
ORH-STL
BOS-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 $411). 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 September 30, 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 at noon.
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 $428 and $669 in November.The cheapest round-trip price found within the last 5 days was $342 on Southwest (Nov 12-Nov 17).
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 50 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 September 26, 2026.
Travelers seeking maximum savings on their Massachusetts to St. Louis flight should consider departing on Friday 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
Chesterfield
Maryland Heights
Collinsville
Edwardsville
Glencoe
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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.
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 September 30, 2026.
Popular flight searches
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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 September 30, 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 7,457,451 searches. Data last updated September 30, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$90 | Average$255 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$148 | Average$558 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$322 | Average$518 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$327 | Average$437 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$338 | Average$523 | FlexibilityNo cancel fee | On-time63% |