Boston to Seattle
BOSSEA
Fly from Boston to Seattle starting at USD 135 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
13 May
AA
16:32BOS
03:36SEA
1 Stop$144VIEW DEAL
1 Jun
B6
07:00BOS
13:17SEA
Direct$195VIEW DEAL
28 Jun
F9
09:10BOS
12:48SEA
2 Stop$240VIEW DEAL
29 Jun
UA
18:45BOS
03:14SEA
1 Stop$196VIEW DEAL
17 Aug
AS
19:44BOS
02:07SEA
Direct$183VIEW DEAL
18 Aug
AA
17:40BOS
02:50SEA
1 Stop$135VIEW DEAL
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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