Cheap flights from Seattle to Northern Virginia

View AU$158 flight on Tue, 26 Aug. 2025Opens in a new window

Popular airlines from Seattle to Northern Virginia

  • American Airlines

    American Airlines

  • Alaska Airlines

    Alaska Airlines

  • Delta

    Delta

  • United

    United

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Cheap Flights from Seattle (SEA) to Northern Virginia (WAS)

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.

American Airlines
Sat, 30 Aug. - Fri, 5 Sep.
SEA
Seattle
BWI
Baltimore
AU$314 Return, found 1 day ago
AU$314
Return
found 1 day ago
Select American Airlines flight, departing Sat, 30 Aug. from Seattle to Baltimore, returning Fri, 5 Sep., priced at AU$314 found 1 day ago
Delta
Sat, 25 Oct. - Sat, 1 Nov.
SEA
Seattle
BWI
Baltimore
AU$319 Return, found 6 days ago
AU$319
Return
found 6 days ago
Select Delta flight, departing Sat, 25 Oct. from Seattle to Baltimore, returning Sat, 1 Nov., priced at AU$319 found 6 days ago
Delta
Sat, 25 Oct. - Sat, 1 Nov.
SEA
Seattle
BWI
Baltimore
AU$342 Return, found 6 days ago
AU$342
Return
found 6 days ago
Select Delta flight, departing Sat, 25 Oct. from Seattle to Baltimore, returning Sat, 1 Nov., priced at AU$342 found 6 days ago
Alaska Airlines
Sat, 30 Aug. - Sat, 6 Sep.
SEA
Seattle
BWI
Baltimore
AU$365 Return, found 6 days ago
AU$365
Return
found 6 days ago
Select Alaska Airlines flight, departing Sat, 30 Aug. from Seattle to Baltimore, returning Sat, 6 Sep., priced at AU$365 found 6 days ago
American Airlines
Sat, 30 Aug. - Fri, 5 Sep.
SEA
Seattle
BWI
Baltimore
AU$368 Return, found 1 day ago
AU$368
Return
found 1 day ago
Select American Airlines flight, departing Sat, 30 Aug. from Seattle to Baltimore, returning Fri, 5 Sep., priced at AU$368 found 1 day ago
United
Fri, 22 Aug. - Mon, 25 Aug.
SEA
Seattle
BWI
Baltimore
AU$433 Return, found 5 days ago
AU$433
Return
found 5 days ago
Select United flight, departing Fri, 22 Aug. from Seattle to Baltimore, returning Mon, 25 Aug., priced at AU$433 found 5 days ago

Find the cheapest month to fly from Seattle (SEA) to Washington (IAD)

September is typically the cheapest month to fly

From AU$266 - AU$455 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.