Boston to Seattle
BOSSEA
Fly from Boston to Seattle starting at USD 135 with American Airlines.
Best fare available on Aug 18, 2026.
Limited seats. Better plans. Book before it's gone.
Boston to Seattle cheapest flights this week
Boston to Seattle monthly flight fare trend
May
from USD 144
Jun
from USD 195
Jul
No flights
Aug
from USD 135
Sep
No flights
Oct
No flights
Airport Details
Origin
Boston
Logan International Airport (BOS)
Boston, BOS
Zone
New York
Elev
20 ft
Destination
Seattle
Seattle–Tacoma International Airport (SEA)
Seattle, SEA
Zone
Los Angeles
Elev
433 ft
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