Boston to Seattle
BOSSEA
Fly from Boston to Seattle starting at SAR 506 with AA.
Best fare available on Aug 18, 2026.
Limited seats. Better plans. Book before it's gone.
Boston to Seattle cheapest flights this week
27 Apr
F9
12:31BOS
16:27SEA
2 StopSAR 900VIEW DEAL
13 May
AA
16:32BOS
07:36SEA
1 StopSAR 540VIEW DEAL
1 Jun
B6
07:00BOS
17:17SEA
DirectSAR 731VIEW DEAL
28 Jun
F9
09:10BOS
16:48SEA
2 StopSAR 900VIEW DEAL
29 Jun
UA
18:45BOS
07:14SEA
1 StopSAR 735VIEW DEAL
17 Aug
AS
19:44BOS
06:07SEA
DirectSAR 686VIEW DEAL
18 Aug
AA
17:40BOS
06:50SEA
1 StopSAR 506VIEW DEAL
Boston to Seattle monthly flight fare trend
Apr
from SAR 900
May
from SAR 540
Jun
from SAR 731
Jul
No flights
Aug
from SAR 506
Sep
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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