Flights from St. Louis to Boston

Our cheapest offers for flights from St. Louis to Boston

Here you can compare cheap flights from St. Louis (STL) to Boston (BOS) for one-way or return trips. The following offers were searched for and found on idealo during the last few days. Or start your own flight search to Boston. Prices and availability may change at any time.

Outbound Return Airlines Shop Baggage Price
St. Louis
Boston
Outbound
10/18/25
1 Stopover (ORD)
UA2144, UA1989
08h 07min
Return
11/17/25
1 Stopover (ORD)
UA2229, UA1872
19h 19min
United Airlines ?
$338
Best option
St. Louis
Boston
Outbound
10/18/25
1 Stopover (ORD)
AA1997, AA3090
08h 16min
Return
11/17/25
direct
AA4500
03h 18min
American Airlines ?
$481
St. Louis
Boston
Outbound
10/18/25
1 Stopover (ORD)
UA2144, UA1779
11h 24min
Return
11/17/25
1 Stopover (ORD)
UA2229, UA1872
19h 19min
United Airlines ?
$343
St. Louis
Boston
Outbound
10/18/25
1 Stopover (FLL)
NK1041, NK2886
13h 53min
Return
11/17/25
3 Stopovers (BNA, ORD, UIN)
NK3921, NK2028, 9X0488, 9X0463
30h 11min
Spirit Airlines
$386
St. Louis
Boston
Outbound
10/18/25
1 Stopover (ORD)
AA1997, AA3090
08h 16min
Return
11/17/25
direct
AA4500
03h 18min
American Airlines ?
$928
Prices based on recent searches, subject to last-minute changes
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Tips and tricks to help you find cheap flights from St. Louis to Boston

Favorite airline: Spirit Airlines
64 % of bookings on this flight route are made with Spirit Airlines, American Airlines and Delta.
Spirit Airlines
27 %
American Airlines
20 %
Delta
17 %
Direct flights are more expensive
Direct flights on this route are $285.00 more expensive on average than flights with a stopover.
non stop flight
1 stop
2 stops
02h 40min
05h 10min
22h 05min
$525
$240
$379
Favourite connection: via Orlando
When booking flights from St. Louis to Boston 48 % of travelers prefer to fly via Orlando.
Route
bookings
1 stopover Orlando International Airport, FL
10h 30min, from $252
48 %
1 stopover Hartsfield-Jackson Atlanta International Airport, GA
05h 49min, from $249
24 %
1 stopover New York - Newark Liberty International Airport, NJ
05h 10min, from $240
14 %

Important flight information

Flight information: St. Louis - Boston

Roundtrip from $337.26
Flight duration min. 02:30 / max. 10:00
Return flight duration min. 03:15/ max. 09:55
Distance 1682 km
Flights per week 29
Departure airport Airport St. Louis - Lambert International Airport (STL)
Arrival airport Airport Boston Logan International Airport, MA (BOS)
Destination country Flights to United States
Alternative routes to United States
Alternative flights to Boston
Flight destinations with a similar price
Flight destinations with a similar price