Flights From Chicago (CHI) to SeaTac (SEA)

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Selected fares from Chicago to SeaTac

The cheapest prices found with in the last 7 days for return flights were CA $143 and CA $71 for one-way flights to SeaTac for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Sat, Sep. 27 - Sat, Oct. 4
ORD
O'Hare Intl.
SEA
Seattle - Tacoma Intl.
CA $143 Roundtrip, found 5 days ago
CA $143
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Sat, Sep. 27 from O'Hare Intl. to Seattle - Tacoma Intl., returning Sat, Oct. 4, priced at CA $143 found 5 days ago
Spirit Airlines
Wed, Aug. 6 - Tue, Aug. 12
ORD
O'Hare Intl.
SEA
Seattle - Tacoma Intl.
CA $183 Roundtrip, found 5 days ago
CA $183
Roundtrip
found 5 days ago
Select Spirit Airlines flight, departing Wed, Aug. 6 from O'Hare Intl. to Seattle - Tacoma Intl., returning Tue, Aug. 12, priced at CA $183 found 5 days ago
Alaska Airlines
Thu, Sep. 18 - Wed, Sep. 24
ORD
O'Hare Intl.
SEA
Seattle - Tacoma Intl.
CA $194 Roundtrip, found 3 days ago
CA $194
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Thu, Sep. 18 from O'Hare Intl. to Seattle - Tacoma Intl., returning Wed, Sep. 24, priced at CA $194 found 3 days ago