Cheap flights from Chicago to Northwest Washington

View AU$137 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.

Delta
Fri, 31 Oct. - Wed, 5 Nov.
ORD
Chicago
SEA
Seattle
AU$280 Return, found 18 hours ago
AU$280
Return
found 18 hours ago
Select Delta flight, departing Fri, 31 Oct. from Chicago to Seattle, returning Wed, 5 Nov., priced at AU$280 found 18 hours ago
Alaska Airlines
Sat, 1 Nov. - Sat, 8 Nov.
ORD
Chicago
SEA
Seattle
AU$288 Return, found 18 hours ago
AU$288
Return
found 18 hours ago
Select Alaska Airlines flight, departing Sat, 1 Nov. from Chicago to Seattle, returning Sat, 8 Nov., priced at AU$288 found 18 hours ago
Alaska Airlines
Tue, 2 Sep. - Tue, 9 Sep.
ORD
Chicago
SEA
Seattle
AU$292 Return, found 6 days ago
AU$292
Return
found 6 days ago
Select Alaska Airlines flight, departing Tue, 2 Sep. from Chicago to Seattle, returning Tue, 9 Sep., priced at AU$292 found 6 days ago
American Airlines
Tue, 2 Sep. - Tue, 9 Sep.
ORD
Chicago
SEA
Seattle
AU$293 Return, found 6 days ago
AU$293
Return
found 6 days ago
Select American Airlines flight, departing Tue, 2 Sep. from Chicago to Seattle, returning Tue, 9 Sep., priced at AU$293 found 6 days ago
Alaska Airlines
Fri, 31 Oct. - Mon, 10 Nov.
ORD
Chicago
SEA
Seattle
AU$301 Return, found 18 hours ago
AU$301
Return
found 18 hours ago
Select Alaska Airlines flight, departing Fri, 31 Oct. from Chicago to Seattle, returning Mon, 10 Nov., priced at AU$301 found 18 hours ago
United
Mon, 3 Nov. - Tue, 4 Nov.
ORD
Chicago
SEA
Seattle
AU$446 Return, found 18 hours ago
AU$446
Return
found 18 hours ago
Select United flight, departing Mon, 3 Nov. from Chicago to Seattle, returning Tue, 4 Nov., priced at AU$446 found 18 hours ago
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