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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 September , October 2026

25 Sep - 28 Oct $ 289.00
STL
St Louis
Frontier Airlines
1 STOPS
BOS
Boston
BOS
Boston
Frontier Airlines
2 STOPS
STL
St Louis
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13 Sep - 01 Oct $ 467.00
STL
St Louis
Frontier Airlines
1 STOPS
BOS
Boston
BOS
Boston
Frontier Airlines
1 STOPS
STL
St Louis
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16 Sep - 01 Oct $ 1,102.00
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

25 Sep - 30 Sep $ 388.00
STL
St Louis
Frontier Airlines
1 STOPS
BOS
Boston
BOS
Boston
Frontier Airlines
2 STOPS
STL
St Louis
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13 Sep - 30 Sep $ 627.00
STL
St Louis
Alaska Airlines
1 STOPS
BOS
Boston
BOS
Boston
Alaska Airlines
1 STOPS
STL
St Louis
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16 Sep - 30 Sep $ 1,195.00
STL
St Louis
Alaska Airlines
1 STOPS
BOS
Boston
BOS
Boston
Alaska Airlines
1 STOPS
STL
St Louis
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One-way flights to Boston from St Louis

5:19 PM - 7:45 AM
Frontier Airlines
1 Stops
16h 32m
STL - BOS
$ 143
Kiwi
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5:19 PM - 7:45 AM
Frontier Airlines
1 Stops
16h 32m
STL - BOS
$ 175
Kiwi
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7:00 AM - 11:29 AM
United Airlines
1 Stops
4h 47m
STL - BOS
$ 356
Kiwi
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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.