BWI to SEA from $258 in economy

UAUnited Airlines

Round Trip•Economy

BWI

Baltimore/Washington International Thurgood Marshall Ai

Baltimore-Washington, United States

SEA

Seattle–Tacoma International Airport

Seattle / Tacoma, United States

$402 USD

-36%$258 USD

Verified 14 days ago

July 2026

Today

Mon

Tue

Wed

Thu

Fri

Sat

Sun

29 30 1 2 3 4 5$1,232 6$583 7$583 8$583 9$583 10$583 11$563 12$461 13$494 14$514 15$536 16$520 17$569 18$488 19$530 20$375 21$462 22$537 23$571 24$492 25$451 26$490 27$412 28$526 29$412 30$492 31$472 1$533 2$499

Rare Availability

6% of dates checked are available within 10% of the lowest price

Sunday, July 26th, 2026

7 round-trip options

Returning

Fri, Jul 31, 2026•5 Day Trip

$528 USD

Google Flights

Returning

Sat, Aug 1, 2026•6 Day Trip

$586 USD

Google Flights

Returning

Sun, Aug 2, 2026•7 Day Trip

$683 USD

Google Flights

Returning

Mon, Aug 3, 2026•8 Day Trip

$575 USD

Google Flights

Returning

Thu, Aug 6, 2026•11 Day Trip

$490 USD

Google Flights

Returning

Fri, Aug 7, 2026•12 Day Trip

$615 USD

Google Flights

Returning

Sat, Aug 8, 2026•13 Day Trip

$674 USD

Google Flights

Baltimore-Washington (BWI) to Seattle / Tacoma (SEA) flight deal in economy from $258

Baltimore/Washington International Thurgood Marshall Ai

Seattle–Tacoma International Airport

July 2026

Sunday, July 26th, 2026