Cheap flights from Washington to Northwest Washington

View AU$159 flight on Thu, 29 Jan. 2026Opens in a new window

Popular airlines from Washington to Northwest Washington

  • Jetstar

    Jetstar

  • Qantas Airways

    Qantas Airways

  • Virgin Australia

    Virgin Australia

  • Scoot

    Scoot

  • American Airlines

    American Airlines

  • Emirates

    Emirates

  • United

    United

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Cheap Flights from Washington (WAS) to Northwest Washington (SEA)

Prices were available within the past 7 days for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Fri, 26 Sep. - Fri, 3 Oct.
BWI
Baltimore
SEA
Seattle
AU$317 Return, found 4 hours ago
AU$317
Return
found 4 hours ago
Select Delta flight, departing Fri, 26 Sep. from Baltimore to Seattle, returning Fri, 3 Oct., priced at AU$317 found 4 hours ago
American Airlines
Mon, 18 Aug. - Tue, 26 Aug.
BWI
Baltimore
SEA
Seattle
AU$318 Return, found 1 day ago
AU$318
Return
found 1 day ago
Select American Airlines flight, departing Mon, 18 Aug. from Baltimore to Seattle, returning Tue, 26 Aug., priced at AU$318 found 1 day ago
Delta
Mon, 18 Aug. - Tue, 26 Aug.
BWI
Baltimore
SEA
Seattle
AU$318 Return, found 1 day ago
AU$318
Return
found 1 day ago
Select Delta flight, departing Mon, 18 Aug. from Baltimore to Seattle, returning Tue, 26 Aug., priced at AU$318 found 1 day ago
Alaska Airlines
Fri, 26 Sep. - Fri, 3 Oct.
BWI
Baltimore
SEA
Seattle
AU$341 Return, found 4 hours ago
AU$341
Return
found 4 hours ago
Select Alaska Airlines flight, departing Fri, 26 Sep. from Baltimore to Seattle, returning Fri, 3 Oct., priced at AU$341 found 4 hours ago
American Airlines
Fri, 26 Sep. - Fri, 3 Oct.
BWI
Baltimore
SEA
Seattle
AU$356 Return, found 4 hours ago
AU$356
Return
found 4 hours ago
Select American Airlines flight, departing Fri, 26 Sep. from Baltimore to Seattle, returning Fri, 3 Oct., priced at AU$356 found 4 hours ago
United
Fri, 26 Sep. - Fri, 3 Oct.
BWI
Baltimore
SEA
Seattle
AU$547 Return, found 4 hours ago
AU$547
Return
found 4 hours ago
Select United flight, departing Fri, 26 Sep. from Baltimore to Seattle, returning Fri, 3 Oct., priced at AU$547 found 4 hours ago
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