Boston (BOS) to Seattle / Tacoma (SEA) flight deal in economy from $273

United AirlinesUAUnited Airlines
Round Trip•Economy
United StatesBOS

Logan International Airport

Boston, United States
United StatesSEA

Seattle–Tacoma International Airport

Seattle / Tacoma, United States
$464 USD
-41%$273 USD
Verified about 5 hours ago
Limited Availability
10% of dates checked are available within 10% of the lowest price

Sunday, October 4th, 2026

0 round-trip options

No flight details available for this date.