Boston to St Louis
BOSSTL
Fly from Boston to St Louis starting at USD 202 with Frontier Airlines.
Best fare available on Nov 17, 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
Sep
No flights
Oct
from USD 421
Nov
from USD 202
Dec
No flights
Jan
No flights
Feb
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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