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

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1 Adults (11+)
0 Children (2~11)
0 Infants (0~2)
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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)
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How to find the cheapest flight from St Louis (STL) to Boston (BOS)
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How to find the cheapest flight from St Louis (STL) to Boston (BOS)
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Cheap flights from St Louis to Boston in July , August 2026

24 Jul - 24 Aug $ 543.00
STL
St Louis
United Airlines
1 STOPS
BOS
Boston
BOS
Boston
United Airlines
1 STOPS
STL
St Louis
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29 Jul - 04 Aug $ 936.00
STL
St Louis
Frontier Airlines
1 STOPS
BOS
Boston
BOS
Boston
Frontier Airlines
1 STOPS
STL
St Louis
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30 Jul - 09 Aug $ 1,499.00
STL
St Louis
Frontier Airlines
1 STOPS
BOS
Boston
BOS
Boston
Frontier Airlines
1 STOPS
STL
St Louis
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Last minute flights from St Louis to Boston

29 Jul - 31 Jul $ 645.00
STL
St Louis
United Airlines
1 STOPS
BOS
Boston
BOS
Boston
United Airlines
1 STOPS
STL
St Louis
Pick dates
29 Jul - 31 Jul $ 645.00
STL
St Louis
United Airlines
1 STOPS
BOS
Boston
BOS
Boston
United Airlines
1 STOPS
STL
St Louis
Pick dates
27 Jul - 31 Jul $ 661.00
STL
St Louis
United Airlines
1 STOPS
BOS
Boston
BOS
Boston
United Airlines
1 STOPS
STL
St Louis
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One-way flights to Boston from St Louis

8:43 AM - 12:55 PM
United Airlines
1 Stops
4h 57m
STL - BOS
$ 323
Kiwi
Pick dates
11:25 AM - 1:55 PM
United Airlines
1 Stops
5h 6m
STL - BOS
$ 323
Kiwi
Pick dates
8:43 AM - 12:55 PM
United Airlines
1 Stops
4h 57m
STL - BOS
$ 335
Kiwi
Pick dates

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

Related info for your journey
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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.