BOS to SEA from $317 in economy – flightdeals.net

Home Premium Fare Deals About

Delta Air Lines

DLDelta Air Lines

Round Trip•Economy

Logan International Airport

Boston, United States

Seattle–Tacoma International Airport

Seattle / Tacoma, United States

$447 USD

-29%$317 USD

Verified 17 days ago

December 2026

Mon

Tue

Wed

Thu

Fri

Sat

Sun

30$427 1$397 2$397 3$397 4$397 5$397 6$397 7$397 8$397 9$397 10$397 11$397 12$397 13$397 14$397 15$397 16$427 17$427 18$467 19$557 20$483 21$483 22$397 23$557 24$397 25$427 26$397 27$557 28$557 29$467 30$467 31$427 1 2 3

Extremely Rare Availability

3% of dates checked are available within 10% of the lowest price

Friday, December 25th, 2026

5 round-trip options

Returning

Thu, Dec 31, 2026•6 Day Trip

$427 USD

Returning

Fri, Jan 1, 2027•7 Day Trip

$427 USD

Returning

Sun, Jan 3, 2027•9 Day Trip

$427 USD

Returning

Tue, Jan 5, 2027•11 Day Trip

$427 USD

Returning

Wed, Jan 6, 2027•12 Day Trip

$427 USD