Baltimore-Washington (BWI) to Seattle / Tacoma (SEA) flight deal from $237 USD in economy class

ASAlaska Airlines, Inc.

Round Trip•Economy

BWI

Baltimore/Washington International Thurgood Marshall Ai

Baltimore-Washington, United States

SEA

Seattle–Tacoma International Airport

Seattle / Tacoma, United States

$420 USD

-44%$237 USD

Verified Nov 6, 2025 at 10:39 AM

December 2025

Today

Mon

Tue

Wed

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Sun

1$548 2$318 3$237 4$257 5$257 6$237 7$257 8$257 9$237 10$237 11$257 12$257 13$237 14$358 15$257 16$237 17$267 18$318 19$408 20$408 21$408 22$358 23$358 24$358 25$358 26$468 27$468 28$548 29$408 30$408 31$318 1 2 3 4

Limited Availability

11% of dates checked are available within 10% of the lowest price

Monday, December 22nd, 2025

10 round-trip options

Returning

Sat, Dec 27, 2025•5 Day Trip

$478 USD

Google Flights

Returning

Sun, Dec 28, 2025•6 Day Trip

$438 USD

Google Flights

Returning

Mon, Dec 29, 2025•7 Day Trip

$438 USD

Google Flights

Returning

Tue, Dec 30, 2025•8 Day Trip

$388 USD

Google Flights

Returning

Wed, Dec 31, 2025•9 Day Trip

$358 USD

Google Flights

Returning

Thu, Jan 1, 2026•10 Day Trip

$388 USD

Google Flights

Returning

Fri, Jan 2, 2026•11 Day Trip

$478 USD

Google Flights

Returning

Sat, Jan 3, 2026•12 Day Trip

$528 USD

Google Flights

Returning

Sun, Jan 4, 2026•13 Day Trip

$378 USD

Google Flights

Returning

Mon, Jan 5, 2026•14 Day Trip

$378 USD

Google Flights