St Louis to Boston

STLBOS

Fly from St Louis to Boston starting at USD 141 with Frontier Airlines.Best fare available on Jul 31, 2026.Limited seats. Better plans. Book before it's gone.

St Louis to Boston cheapest flights this week

31 Jul
Frontier Airlines
16:57STL
06:42BOS
1 StopUSD 141VIEW DEAL
1 Aug
Frontier Airlines
16:09STL
08:09BOS
1 StopUSD 178VIEW DEAL
21 Aug
Frontier Airlines
18:17STL
10:47BOS
1 StopUSD 151VIEW DEAL

St Louis to Boston monthly flight fare trend

Jul
from USD 141
Aug
from USD 151
Sep
No flights
Oct
No flights
Nov
No flights
Dec
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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