Earn point on your loyalty program!arrow arc left

Cheap flights from St Louis (STL) to Boston (BOS)

Know your dates, get live prices in seconds
airplane logo

pin logo

calendar
Departure
calendar backward
Return
airplane logo
1 Adults (11+)
0 Children (2~11)
0 Infants (0~2)
Save up to 31%
Book Flight + Hotel at the same time

How to find the cheapest flight from St Louis (STL) to Boston (BOS)

How to find the cheapest flight from St Louis (STL) to Boston (BOS)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from St Louis (STL) to Boston (BOS)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from St Louis (STL) to Boston (BOS)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.

Cheap flights from St Louis to Boston in January , February 2026

31 Jan - 03 Feb $ 299.00
STL
St Louis
Frontier Airlines
1 STOPS
BOS
Boston
BOS
Boston
Frontier Airlines
1 STOPS
STL
St Louis
Pick dates
31 Jan - 07 Feb $ 299.00
STL
St Louis
Frontier Airlines
1 STOPS
BOS
Boston
BOS
Boston
Frontier Airlines
1 STOPS
STL
St Louis
Pick dates
20 Jan - 04 Feb $ 834.00
STL
St Louis
Alaska Airlines
1 STOPS
BOS
Boston
BOS
Boston
Alaska Airlines
1 STOPS
STL
St Louis
Pick dates

Last minute flights from St Louis to Boston

24 Jan - 31 Jan $ 406.00
STL
St Louis
Frontier Airlines
2 STOPS
BOS
Boston
BOS
Boston
Frontier Airlines
1 STOPS
STL
St Louis
Pick dates
30 Jan - 31 Jan $ 445.00
STL
St Louis
Frontier Airlines
1 STOPS
BOS
Boston
BOS
Boston
Frontier Airlines
1 STOPS
STL
St Louis
Pick dates
20 Jan - 01 Feb $ 992.00
STL
St Louis
Hawaiian Airlines
1 STOPS
BOS
Boston
BOS
Boston
Hawaiian Airlines
1 STOPS
STL
St Louis
Pick dates

One-way flights to Boston from St Louis

12:12 PM - 8:20 PM
Spirit Airlines
1 Stops
10h 7m
STL - BOS
$ 223
Kiwi
Pick dates
7:00 AM - 8:30 PM
United Airlines
1 Stops
13h 52m
STL - BOS
$ 343
Kiwi
Pick dates
8:30 AM - 12:40 PM
United Airlines
1 Stops
4h 47m
STL - BOS
$ 412
Kiwi
Pick dates

How to find the cheapest flight from St Louis (STL) to Boston (BOS)

Related info for your journey
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from St Louis (STL) to Boston (BOS)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from St Louis (STL) to Boston (BOS)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.