Cheap flights from St Louis (STL) to Boston (BOS)
Know your dates, get live prices in secondsHow 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 February , March 2026
28 Feb - 31 Mar
$ 608.00
STL
St Louis
Frontier Airlines
1 STOPS
BOS
Boston
BOS
Boston
Frontier Airlines
1 STOPS
STL
St Louis
28 Feb - 09 Mar
$ 1,535.00
STL
St Louis
Hawaiian Airlines
1 STOPS
BOS
Boston
BOS
Boston
Hawaiian Airlines
1 STOPS
STL
St Louis
28 Feb - 06 Mar
$ 1,559.00
STL
St Louis
Alaska Airlines
1 STOPS
BOS
Boston
BOS
Boston
Alaska Airlines
1 STOPS
STL
St Louis
One-way flights to Boston from St Louis
5:41 PM - 7:55 AM
United Airlines
United Airlines
1 Stops
14h 34m
STL - BOS
STL - BOS
5:41 PM - 6:00 AM
United Airlines
United Airlines
1 Stops
12h 34m
STL - BOS
STL - BOS
3:15 PM - 6:20 PM
United Airlines
United Airlines
1 Stops
5h 33m
STL - BOS
STL - BOS
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)
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How to find the cheapest flight from St Louis (STL) to Boston (BOS)
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