Boston (BOS) to Seattle / Tacoma (SEA) flight deal in economy from $317

Delta Air LinesDLDelta Air Lines
Round Trip•Economy
United StatesBOS

Logan International Airport

Boston, United States
United StatesSEA

Seattle–Tacoma International Airport

Seattle / Tacoma, United States
$447 USD
-29%$317 USD
Verified 17 days ago
Extremely Rare Availability
3% of dates checked are available within 10% of the lowest price

Friday, November 20th, 2026

5 round-trip options

Returning
Thu, Nov 26, 2026•6 Day Trip
$397 USD
Google Flights
Returning
Fri, Nov 27, 2026•7 Day Trip
$397 USD
Google Flights
Returning
Sun, Nov 29, 2026•9 Day Trip
$557 USD
Google Flights
Returning
Tue, Dec 1, 2026•11 Day Trip
$397 USD
Google Flights
Returning
Wed, Dec 2, 2026•12 Day Trip
$397 USD
Google Flights