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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 May , June 2026

30 May - 18 Jun $ 204.00
STL
St Louis
Frontier Airlines
1 STOPS
BOS
Boston
BOS
Boston
Frontier Airlines
1 STOPS
STL
St Louis
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11 May - 02 Jun $ 899.00
STL
St Louis
Alaska Airlines
1 STOPS
BOS
Boston
BOS
Boston
Alaska Airlines
1 STOPS
STL
St Louis
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11 May - 03 Jun $ 899.00
STL
St Louis
Alaska Airlines
1 STOPS
BOS
Boston
BOS
Boston
Alaska Airlines
1 STOPS
STL
St Louis
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Last minute flights from St Louis to Boston

30 May - 31 May $ 332.00
STL
St Louis
Frontier Airlines
1 STOPS
BOS
Boston
BOS
Boston
Frontier Airlines
1 STOPS
STL
St Louis
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11 May - 31 May $ 929.00
STL
St Louis
Alaska Airlines
1 STOPS
BOS
Boston
BOS
Boston
Alaska Airlines
1 STOPS
STL
St Louis
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09 May - 31 May $ 929.00
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

5:27 PM - 10:40 PM
Frontier Airlines
1 Stops
6h 57m
STL - BOS
$ 107
Kiwi
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10:25 AM - 12:45 PM
United Airlines
1 Stops
4h 51m
STL - BOS
$ 469
Kiwi
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8:45 AM - 12:43 PM
United Airlines
1 Stops
4h 41m
STL - BOS
$ 496
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.