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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 April , May 2026

30 Apr - 12 May $ 216.00
STL
St Louis
Frontier Airlines
2 STOPS
BOS
Boston
BOS
Boston
Frontier Airlines
1 STOPS
STL
St Louis
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10 Apr - 05 May $ 1,051.00
STL
St Louis
Alaska Airlines
1 STOPS
BOS
Boston
BOS
Boston
Alaska Airlines
1 STOPS
STL
St Louis
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11 Apr - 05 May $ 1,094.00
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

18 Apr - 30 Apr $ 299.00
STL
St Louis
Frontier Airlines
1 STOPS
BOS
Boston
BOS
Boston
Frontier Airlines
1 STOPS
STL
St Louis
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10 Apr - 01 May $ 1,100.00
STL
St Louis
Alaska Airlines
1 STOPS
BOS
Boston
BOS
Boston
Alaska Airlines
1 STOPS
STL
St Louis
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11 Apr - 30 Apr $ 1,285.00
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

11:21 AM - 8:43 PM
Spirit Airlines
2 Stops
11h 36m
STL - BOS
$ 131
Kiwi
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11:15 AM - 1:55 PM
United Airlines
1 Stops
5h 11m
STL - BOS
$ 403
Kiwi
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6:55 PM - 9:30 PM
United Airlines
1 Stops
5h 4m
STL - BOS
$ 525
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.