Flights to North Seattle from Chicago - $90

View $90 flight on Fri, Oct 31, 2025Opens in a new window

Popular airlines from Chicago to North Seattle

  • Alaska Airlines

    Alaska Airlines

  • Delta

    Delta

  • Southwest Airlines

    Southwest Airlines

  • United

    United

  • American Airlines

    American Airlines

  • JetBlue Airways

    JetBlue Airways

  • Spirit Airlines

    Spirit Airlines

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Cheap Flights from Chicago to North Seattle (CHI-SEA)

Prices were available within the past 7 days and start at $90 for one-way flights and $179 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Sat, Aug 30 - Sun, Aug 31
ORD
Chicago
SEA
Seattle
$179 Roundtrip, found 1 hour ago
$179
Roundtrip
found 1 hour ago
Select Alaska Airlines flight, departing Sat, Aug 30 from Chicago to Seattle, returning Sun, Aug 31, priced at $179 found 1 hour ago
United
Fri, Oct 31 - Fri, Oct 31
ORD
Chicago
SEA
Seattle
$179 Roundtrip, found 1 day ago
$179
Roundtrip
found 1 day ago
Select United flight, departing Fri, Oct 31 from Chicago to Seattle, returning Fri, Oct 31, priced at $179 found 1 day ago
Delta
Fri, Oct 31 - Fri, Oct 31
ORD
Chicago
SEA
Seattle
$179 Roundtrip, found 1 day ago
$179
Roundtrip
found 1 day ago
Select Delta flight, departing Fri, Oct 31 from Chicago to Seattle, returning Fri, Oct 31, priced at $179 found 1 day ago
American Airlines
Fri, Oct 31 - Tue, Nov 4
RFD
Rockford
SEA
Seattle
$184 Roundtrip, found 1 day ago
$184
Roundtrip
found 1 day ago
Select American Airlines flight, departing Fri, Oct 31 from Rockford to Seattle, returning Tue, Nov 4, priced at $184 found 1 day ago
Southwest Airlines
Tue, Aug 26 - Sat, Aug 30
MDW
Chicago
SEA
Seattle
$184 Roundtrip, found 5 hours ago
$184
Roundtrip
found 5 hours ago
Select Southwest Airlines flight, departing Tue, Aug 26 from Chicago to Seattle, returning Sat, Aug 30, priced at $184 found 5 hours ago
Hawaiian Airlines
Tue, Sep 2 - Wed, Sep 17
ORD
Chicago
SEA
Seattle
$213 Roundtrip, found 1 day ago
$213
Roundtrip
found 1 day ago
Select Hawaiian Airlines flight, departing Tue, Sep 2 from Chicago to Seattle, returning Wed, Sep 17, priced at $213 found 1 day ago

Find the cheapest month to fly from Chicago (CHI) to Seattle (SEA)

September is typically the cheapest month to fly

From $98 - $217 per traveler.

Graph displaying average flight prices per month

Alternative airports

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Seattle - Tacoma Intl. SEA. Cheapest option available. Flights from $219
SEA
Seattle - Tacoma Intl.
Cheapest
Flights from $219
Select flight to Snohomish County - Paine Field PAE. Flights from $673
PAE
Snohomish County - Paine Field
Flights from $673
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