Boston to St Louis
BOSSTL
Fly from Boston to St Louis starting at USD 200 with Frontier Airlines.
Best fare available on Aug 23, 2026.
Limited seats. Better plans. Book before it's gone.
Boston to St Louis cheapest flights this week
Boston to St Louis monthly flight fare trend
Jun
No flights
Jul
No flights
Aug
from USD 200
Sep
No flights
Oct
No flights
Nov
No flights
Airport Details
Origin
Boston
Logan International Airport (BOS)
Boston, BOS
Zone
New York
Elev
20 ft
Destination
St Louis
St. Louis Lambert International Airport (STL)
St Louis, STL
Zone
Chicago
Elev
618 ft
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