Cheap flights from Chicago to Northwest Washington

View AU$139 flight on Fri, 31 Oct. 2025Opens in a new window

Popular airlines from Chicago 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 Chicago (CHI) 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.

Alaska Airlines
Fri, 31 Oct. - Sat, 8 Nov.
ORD
Chicago
SEA
Seattle
AU$285 Return, found 3 days ago
AU$285
Return
found 3 days ago
Select Alaska Airlines flight, departing Fri, 31 Oct. from Chicago to Seattle, returning Sat, 8 Nov., priced at AU$285 found 3 days ago
American Airlines
Fri, 31 Oct. - Sat, 8 Nov.
ORD
Chicago
SEA
Seattle
AU$286 Return, found 3 days ago
AU$286
Return
found 3 days ago
Select American Airlines flight, departing Fri, 31 Oct. from Chicago to Seattle, returning Sat, 8 Nov., priced at AU$286 found 3 days ago
Alaska Airlines
Tue, 2 Sep. - Tue, 9 Sep.
ORD
Chicago
SEA
Seattle
AU$292 Return, found 4 days ago
AU$292
Return
found 4 days ago
Select Alaska Airlines flight, departing Tue, 2 Sep. from Chicago to Seattle, returning Tue, 9 Sep., priced at AU$292 found 4 days ago
American Airlines
Tue, 2 Sep. - Tue, 9 Sep.
ORD
Chicago
SEA
Seattle
AU$293 Return, found 4 days ago
AU$293
Return
found 4 days ago
Select American Airlines flight, departing Tue, 2 Sep. from Chicago to Seattle, returning Tue, 9 Sep., priced at AU$293 found 4 days ago
Delta
Mon, 8 Sep. - Wed, 24 Sep.
ORD
Chicago
SEA
Seattle
AU$315 Return, found 3 days ago
AU$315
Return
found 3 days ago
Select Delta flight, departing Mon, 8 Sep. from Chicago to Seattle, returning Wed, 24 Sep., priced at AU$315 found 3 days ago
United
Fri, 31 Oct. - Sat, 8 Nov.
ORD
Chicago
SEA
Seattle
AU$355 Return, found 3 days ago
AU$355
Return
found 3 days ago
Select United flight, departing Fri, 31 Oct. from Chicago to Seattle, returning Sat, 8 Nov., priced at AU$355 found 3 days ago
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