Seattle / Tacoma (SEA) to Boston (BOS) flight deal in economy from $303

United AirlinesUAUnited Airlines
Round Trip•Economy
United StatesSEA

Seattle–Tacoma International Airport

Seattle / Tacoma, United States
United StatesBOS

Logan International Airport

Boston, United States
$421 USD
-28%$303 USD
Verified 1 day ago
Limited Availability
10% of dates checked are available within 10% of the lowest price

Sunday, January 3rd, 2027

3 round-trip options

Returning
Sat, Jan 9, 2027•6 Day Trip
$394 USD
Google Flights
Returning
Mon, Jan 11, 2027•8 Day Trip
$396 USD
Google Flights
Returning
Fri, Jan 15, 2027•12 Day Trip
$396 USD
Google Flights