$109+ Cheap flights from St. Louis to Boston (STL - BOS)
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 12/12. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BOS
Dec 11 — Dec 181
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from St. Louis to Boston with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from Lambert-St Louis to Boston Logan Intl are usually found in November or December, booked 78 days in advance, depart on a Thursday or Friday and return on a Wednesday
Cheap flight deals from St. Louis to Boston
Cheapest
Best
Last-minute
One-way
Cheapest flights from St. Louis to BostonExplore the most affordable flight options available from St. Louis to Boston. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 11, 2026.
Explore the most affordable flight options available from St. Louis to Boston. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 11, 2026.
This CheapOair deal was found by Cheapflights users on 11/9. Clicking the “Pick Dates” 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 12/245:58 pm -
1 stop14h 32m
Wed 12/3010:25 am -
1 stop15h 16m
Deal found 11/9![Frontier logo]()
$335
This American Airlines deal was found by Cheapflights users on 11/7. Clicking the “Pick Dates” 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 12/56:20 pm -
Nonstop2h 37m
Sat 12/123:21 pm -
Nonstop3h 29m
Deal found 11/7![American Airlines logo]()
$339
This CheapOair deal was found by Cheapflights users on 11/10. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/216:05 pm -
1 stop15h 06m
Tue 11/2411:06 am -
1 stop13h 53m
Deal found 11/10![Frontier logo]()
$340
This Trip.com deal was found by Cheapflights users on 11/9. Clicking the “Pick Dates” 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.
Thu 11/266:09 pm -
1 stop15h 02m
Mon 11/3011:06 am -
1 stop13h 53m
Deal found 11/9![Frontier logo]()
$341
This Kissandfly.com deal was found by Cheapflights users on 11/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/39:59 am -
Nonstop2h 37m
Mon 12/711:08 am -
1 stop14h 04m
Deal found 11/8![Frontier logo]()
$348
This Southwest deal was found by Cheapflights users on 11/8. Clicking the “Pick Dates” 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 12/912:40 pm -
1 stop5h 05m
Wed 12/161:10 pm -
Nonstop3h 10m
Deal found 11/8![Southwest logo]()
$349
This Frontier deal was found by Cheapflights users on 11/7. Clicking the “Pick Dates” 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 11/197:24 pm -
1 stop11h 17m
Sun 11/2211:06 am -
1 stop13h 53m
Deal found 11/7![Frontier logo]()
$350
This Kissandfly.com deal was found by Cheapflights users on 11/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/51:15 pm -
Nonstop2h 40m
Mon 12/711:08 am -
1 stop14h 04m
Deal found 11/9![Frontier logo]()
$353
This Southwest deal was found by Cheapflights users on 11/8. Clicking the “Pick Dates” 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 12/1210:50 am -
Nonstop2h 30m
Wed 12/161:20 pm -
2 stops7h 05m
Deal found 11/8![Southwest logo]()
$354
This CheapOair deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” 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 11/216:05 pm -
1 stop15h 06m
Wed 11/2511:06 am -
1 stop13h 53m
Deal found 11/6![Frontier logo]()
$355
This Delta deal was found by Cheapflights users on 11/7. Clicking the “Pick Dates” 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 12/15:51 pm -
1 stop6h 19m
Wed 12/98:00 am -
1 stop6h 28m
Deal found 11/7![Delta logo]()
$359
Best flights from St. Louis to BostonDiscover carefully curated flight deals from St. Louis to Boston that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated November 11, 2026.
Discover carefully curated flight deals from St. Louis to Boston that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated November 11, 2026.
This Southwest deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” 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 12/410:15 am -
Nonstop2h 30m
Sat 12/55:35 am -
Nonstop3h 05m
Deal found 11/6![Southwest logo]()
$364
This United Airlines deal was found by Cheapflights users on 11/7. Clicking the “Pick Dates” 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 12/56:30 am -
2 stops7h 02m
Thu 12/106:00 am -
1 stop5h 30m
Deal found 11/7![United Airlines logo]()
$379
This Southwest deal was found by Cheapflights users on 11/9. Clicking the “Pick Dates” 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 12/31:20 pm -
Nonstop2h 30m
Sat 12/57:15 am -
1 stop5h 25m
Deal found 11/9![Southwest logo]()
$364
This United Airlines deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” 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 12/48:02 am -
1 stop4h 52m
Sat 12/55:45 am -
2 stops7h 39m
Deal found 11/6![United Airlines logo]()
$389
This Southwest deal was found by Cheapflights users on 11/9. Clicking the “Pick Dates” 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 2/110:30 am -
Nonstop2h 35m
Mon 2/86:50 pm -
Nonstop3h 10m
Deal found 11/9![Southwest logo]()
$369
This Southwest deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” 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 12/2510:15 am -
Nonstop2h 30m
Sat 1/95:10 am -
1 stop5h 15m
Deal found 11/6![Southwest logo]()
$374
This United Airlines deal was found by Cheapflights users on 11/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/256:04 am -
1 stop5h 06m
Sat 1/25:00 pm -
1 stop7h 05m
Deal found 11/10![United Airlines logo]()
$480
This Southwest deal was found by Cheapflights users on 11/10. 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.
Fri 12/46:20 am -
1 stop4h 40m
Fri 12/45:55 pm -
1 stop5h 05m
Deal found 11/10![Southwest logo]()
$439
This United Airlines deal was found by Cheapflights users on 11/9. Clicking the “Pick Dates” 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 12/38:02 am -
1 stop4h 52m
Sat 12/56:00 am -
2 stops9h 41m
Deal found 11/9![United Airlines logo]()
$489
This Southwest deal was found by Cheapflights users on 11/8. Clicking the “Pick Dates” 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 12/176:00 am -
Nonstop2h 30m
Sun 12/2012:45 pm -
Nonstop3h 05m
Deal found 11/8![Southwest logo]()
$455
This Southwest deal was found by Cheapflights users on 11/9. Clicking the “Pick Dates” 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 12/1010:15 am -
Nonstop2h 30m
Sun 12/136:35 pm -
Nonstop3h 05m
Deal found 11/9![Southwest logo]()
$455
Last-minute flights from St. Louis to BostonDiscover last-minute flight deals from St. Louis to Boston. Data last updated November 11, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Boston. Data last updated November 11, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 11/7. Clicking the “Pick Dates” 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 11/197:24 pm -
1 stop11h 17m
Sun 11/2211:06 am -
1 stop13h 53m
Deal found 11/7![Frontier logo]()
$350
This CheapOair deal was found by Cheapflights users on 11/10. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/216:05 pm -
1 stop15h 06m
Tue 11/2411:06 am -
1 stop13h 53m
Deal found 11/10![Frontier logo]()
$340
This CheapOair deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” 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 11/216:05 pm -
1 stop15h 06m
Wed 11/2511:06 am -
1 stop13h 53m
Deal found 11/6![Frontier logo]()
$355
This Trip.com deal was found by Cheapflights users on 11/9. Clicking the “Pick Dates” 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.
Thu 11/266:09 pm -
1 stop15h 02m
Mon 11/3011:06 am -
1 stop13h 53m
Deal found 11/9![Frontier logo]()
$341
This Delta deal was found by Cheapflights users on 11/7. Clicking the “Pick Dates” 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 12/17:18 pm -
1 stop4h 52m
Tue 12/86:20 am -
1 stop6h 09m
Deal found 11/7![Delta logo]()
$359
This Kissandfly.com deal was found by Cheapflights users on 11/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/39:59 am -
Nonstop2h 37m
Mon 12/711:08 am -
1 stop14h 04m
Deal found 11/8![Frontier logo]()
$348
This American Airlines deal was found by Cheapflights users on 11/7. Clicking the “Pick Dates” 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 12/56:20 pm -
Nonstop2h 37m
Sat 12/123:21 pm -
Nonstop3h 29m
Deal found 11/7![American Airlines logo]()
$339
This Kissandfly.com deal was found by Cheapflights users on 11/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/51:15 pm -
Nonstop2h 40m
Mon 12/711:08 am -
1 stop14h 04m
Deal found 11/9![Frontier logo]()
$353
This Southwest deal was found by Cheapflights users on 11/8. Clicking the “Pick Dates” 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 12/912:40 pm -
1 stop5h 05m
Wed 12/161:10 pm -
Nonstop3h 10m
Deal found 11/8![Southwest logo]()
$349
This Southwest deal was found by Cheapflights users on 11/8. Clicking the “Pick Dates” 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 12/1210:50 am -
Nonstop2h 30m
Wed 12/161:20 pm -
2 stops7h 05m
Deal found 11/8![Southwest logo]()
$354
This CheapOair deal was found by Cheapflights users on 11/9. Clicking the “Pick Dates” 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 12/245:58 pm -
1 stop14h 32m
Wed 12/3010:25 am -
1 stop15h 16m
Deal found 11/9![Frontier logo]()
$335
One-way flights from St. Louis to BostonSearch for one-way flight options from St. Louis to Boston. Find affordable one-way fares based on user searches. Data last updated November 11, 2026.
Search for one-way flight options from St. Louis to Boston. Find affordable one-way fares based on user searches. Data last updated November 11, 2026.
This Super.com deal was found by Cheapflights users on 11/8. Clicking the “Pick Dates” 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.
Sat 12/126:20 pm -
1 stop14h 53m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/8![Frontier logo]()
$109
This Booking.com deal was found by Cheapflights users on 11/10. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/26:13 pm -
1 stop14h 58m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/10![Frontier logo]()
$111
This Frontier deal was found by Cheapflights users on 11/9. Clicking the “Pick Dates” 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.
Wed 11/256:35 pm -
1 stop12h 06m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/9![Frontier logo]()
$131
This Mytrip deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/1612:02 pm -
2 stops20h 28m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/6![Frontier logo]()
$143
This Super.com deal was found by Cheapflights users on 11/7. Clicking the “Pick Dates” 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 12/136:20 pm -
1 stop14h 53m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/7![Frontier logo]()
$148
This Super.com deal was found by Cheapflights users on 11/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/106:20 pm -
1 stop14h 53m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/9![Frontier logo]()
$149
This Mytrip deal was found by Cheapflights users on 11/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/46:13 pm -
1 stop15h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/9![Frontier logo]()
$151
This CheapOair deal was found by Cheapflights users on 11/9. Clicking the “Pick Dates” 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.
Sun 1/315:59 pm -
1 stop14h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/9![Frontier logo]()
$156
This Super.com deal was found by Cheapflights users on 11/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/236:21 pm -
1 stop12h 22m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/8![Frontier logo]()
$158
This Super.com deal was found by Cheapflights users on 11/9. Clicking the “Pick Dates” 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 11/231:20 pm -
1 stop19h 51m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/9![Frontier logo]()
$168
This American Airlines deal was found by Cheapflights users on 11/9. Clicking the “Pick Dates” 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 12/16:21 pm -
Nonstop2h 36m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/9![American Airlines logo]()
$170
This Booking.com deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/266:09 pm -
1 stop15h 02m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/6![Frontier logo]()
$171
Find flight deals from St. Louis to Boston
Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Boston (BOS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated November 11, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $335 (CheapOair) |
One-way from | $109 (Super.com) |
Popular in | February |
Cheapest in | November |
Average price | $444 |
Good round-trip deal | $619 or less |
Good one-way deal | $300 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from St. Louis to Boston 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 November 11, 2026.
Use the filters below to find and compare flights from St. Louis to Boston that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
St. LouisBoston
STL Lambert-St Louis - BOS Boston Logan Intl
STLBOS
Lambert-St Louis
Fri 12/25
6:21 pm-7:43 am
1 stop12h 22m
Boston Logan Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$151
Quickest round-trip
St. LouisBoston
STL Lambert-St Louis - BOS Boston Logan Intl
STLBOS
Lambert-St Louis
Tue 12/22
5:00 am-8:30 am
Nonstop2h 30m
Boston Logan Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$170
St. LouisBoston
STL Lambert-St Louis - BOS Boston Logan Intl
STLBOS
Lambert-St Louis
Sat 1/30
4:44 pm-1:10 am
1 stop7h 26m
Boston Logan Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$180
St. LouisBoston
STL Lambert-St Louis - BOS Boston Logan Intl
STLBOS
Lambert-St Louis
Sat 12/12
3:25 pm-11:59 pm
2 stops7h 34m
Boston Logan Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$185
St. LouisBoston
STL Lambert-St Louis - BOS Boston Logan Intl
STLBOS
Lambert-St Louis
Mon 2/1
10:30 am-2:05 pm
Nonstop2h 35m
Boston Logan Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$185
St. LouisBoston
STL Lambert-St Louis - BOS Boston Logan Intl
STLBOS
Lambert-St Louis
Sat 1/30
8:30 am-4:00 pm
2 stops6h 30m
Boston Logan Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$185
St. LouisBoston
STL Lambert-St Louis - BOS Boston Logan Intl
STLBOS
Lambert-St Louis
Mon 12/7
7:00 am-3:15 pm
1 stop7h 15m
Boston Logan Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$195
St. LouisBoston
STL Lambert-St Louis - BOS Boston Logan Intl
STLBOS
Lambert-St Louis
Fri 12/11
7:55 pm-11:25 pm
Nonstop2h 30m
Boston Logan Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$195
St. LouisBoston
STL Lambert-St Louis - BOS Boston Logan Intl
STLBOS
Lambert-St Louis
Fri 12/25
1:15 pm-4:45 pm
Nonstop2h 30m
Boston Logan Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$195
St. LouisBoston
STL Lambert-St Louis - BOS Boston Logan Intl
STLBOS
Lambert-St Louis
Sat 12/19
8:10 am-11:40 am
Nonstop2h 30m
Boston Logan Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$195
Showing 1-10 of 21 resultsSorted by cheapest first
Compare providers for flights from St. Louis to Boston
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Boston in November.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on St. Louis-Boston flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Boston flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Boston flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on St. Louis-Boston flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Boston flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from St. Louis to Boston
Have a flexible travel schedule? Discover the best time to fly to Boston from St. Louis with our price prediction graph.
STL-BOS
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 St. Louis to Boston
Prices
Airlines
How far ahead should I book a flight from St. Louis to Boston?
The best time to book flights from St. Louis to Boston is 77 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 month to book a flight from St. Louis to Boston?
Currently, November is the cheapest month in which you can book a flight from St. Louis to Boston (average of $444). Flying from St. Louis to Boston in February is currently the most expensive (average of $704). 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 STL to BOS?
Find hourly flight availability from St. Louis to Boston. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 11, 2026.
A simple way to save on the total cost of your ticket is to fly from St. Louis to Boston in the evening. If you’re flexible enough to do this you can expect to save up to 43% on your trip compared to booking a flight at noon.
What is the cheapest day to fly from St. Louis to Boston?
Use this chart to determine the cheapest time to fly round-trip from St. Louis to Boston. Price data was last updated on November 7, 2026.
Travelers seeking maximum savings on their St. Louis to Boston flight should consider departing on Monday afternoons when fares are most often at their lowest. Tuesday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
The best insider tips for St. Louis to Boston flights
AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your St. Louis to Boston trip
Our travel experts
Reviews of airlines servicing Boston
Get insights into the airlines that provide service to Boston. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Boston. Reviews last updated November 11, 2026.
Read reviews from past customers who have flown Southwest,United Airlines, andJetBlue from St. Louis to Boston. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
7.0
Boarding
8.1
Entertainment
7.5
Overall
8.0
Comfort
8.0
Crew
8.6
Reviews
1 / 20
8.0
ExcellentPatricia,Oct 2026
DAL - TPA
Food
7.0
Boarding
8.1
Entertainment
7.5
Overall
8.0
Comfort
8.0
Crew
8.6
Reviews
1 / 20
8.0
ExcellentPatricia,Oct 2026
DAL - TPA
Food
7.0
Boarding
8.1
Entertainment
7.5
Overall
8.0
Comfort
8.0
Crew
8.6
Reviews
1 / 20
8.0
ExcellentPatricia,Oct 2026
DAL - TPA
Food
7.0
Boarding
8.1
Entertainment
7.5
Overall
8.0
Comfort
8.0
Crew
8.6
Reviews
1 / 20
8.0
ExcellentPatricia,Oct 2026
DAL - TPA
Food
7.0
Boarding
8.1
Entertainment
7.5
Overall
8.0
Comfort
8.0
Crew
8.6
Reviews
1 / 20
8.0
ExcellentPatricia,Oct 2026
DAL - TPA
Food
7.0
Boarding
8.1
Entertainment
7.5
Overall
8.0
Comfort
8.0
Crew
8.6
Reviews
1 / 20
8.0
ExcellentPatricia,Oct 2026
DAL - TPA
Related info for your journey
Find useful and relevant information for your journey from St. Louis to Boston. 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 Boston?
Book flights to Boston if you plan to visit one of these locationsWaltham
Randolph
Concord
Cambridge
Brockton
Dedham
Cranston
Warwick
Pawtucket
Peabody
Revere
Fitchburg
Londonderry
York Beach
North Falmouth
Chelsea
Swansea
Braintree
Auburn
Sandwich
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Boston flight routes
Complete your trip
Flights by cabin class
Other flight options
Other flights from St. Louis
Popular flights
Alternative routes for St. Louis to Boston
See prices for flight routes from nearby airports that may be better suited for you.
Other flights to Boston
Explore flights to Boston departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on November 11, 2026.
Complete your trip
Complete your trip to Boston by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from St. Louis to Boston by cabin class
Find flights from St. Louis to Boston, based on your preferred cabin class, be it economy, premium economy, business, or first class.
St. Louis and Boston flights
Browse other St. Louis and Boston flight options. Last updated on November 11, 2026.
Other flights from St. Louis
Browse through other flights departing from St. Louis. Flights are based on user searches made on Cheapflights and were last updated on November 11, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 5 airlines flying from St. Louis to Boston
Discover the top 5 airlines that operate flights from St. Louis to Boston. 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 November 11, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$155 | Average$274 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$264 | Average$610 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$310 | Average$476 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$316 | Average$438 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$331 | Average$513 | FlexibilityNo cancel fee | On-time63% |