St Louis to Boston
STLBOS
Fly from St Louis to Boston starting at USD 126 with Frontier Airlines.
Best fare available on Jun 5, 2026.
Limited seats. Better plans. Book before it's gone.
St Louis to Boston cheapest flights this week
St Louis to Boston monthly flight fare trend
May
from USD 155
Jun
from USD 126
Jul
from USD 179
Aug
No flights
Sep
No flights
Oct
No flights
Airport Details
Origin
St Louis
St. Louis Lambert International Airport (STL)
St Louis, STL
Zone
Chicago
Elev
618 ft
Destination
Boston
Logan International Airport (BOS)
Boston, BOS
Zone
New York
Elev
20 ft
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