Chicago to Seattle Flights (CHI-SEA) from $70

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Selected fares from Chicago to Seattle

The cheapest prices found with in the last 7 days for return flights were $128 and $70 for one-way flights to Seattle for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Tue, May 7 - Sat, May 11
MDW
Midway Intl.
SEA
Seattle - Tacoma Intl.
$128 Roundtrip, found 2 days ago
$128
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Tue, May 7 from Midway Intl. to Seattle - Tacoma Intl., returning Sat, May 11, priced at $128 found 2 days ago
Alaska Airlines
Tue, Jun 4 - Wed, Jun 12
ORD
O'Hare Intl.
SEA
Seattle - Tacoma Intl.
$139 Roundtrip, just found
$139
Roundtrip
just found
Select Alaska Airlines flight, departing Tue, Jun 4 from O'Hare Intl. to Seattle - Tacoma Intl., returning Wed, Jun 12, priced at $139 just found
American Airlines
Tue, Sep 24 - Sat, Oct 5
ORD
O'Hare Intl.
SEA
Seattle - Tacoma Intl.
$139 Roundtrip, found 3 days ago
$139
Roundtrip
found 3 days ago
Select American Airlines flight, departing Tue, Sep 24 from O'Hare Intl. to Seattle - Tacoma Intl., returning Sat, Oct 5, priced at $139 found 3 days ago

Save more with Seattle Flight + Hotel packages

Prices and availability subject to change. Additional terms may apply.
Residence Inn Seattle South/Tukwila

Residence Inn Seattle South/Tukwila

3 out of 5
per person
May 25 - Jun 1
Roundtrip flight included
Chicago (ORD) to Seattle (SEA)
Astra Hotel, Seattle, A Tribute Portfolio Hotel by Marriott South Lake Union

Astra Hotel, Seattle, A Tribute Portfolio Hotel by Marriott South Lake Union

4 out of 5
per person
May 25 - Jun 1
Roundtrip flight included
Chicago (ORD) to Seattle (SEA)
Residence Inn by Marriott Seattle Downtown/Lake Union

Residence Inn by Marriott Seattle Downtown/Lake Union

3 out of 5
per person
May 25 - Jun 1
Roundtrip flight included
Chicago (ORD) to Seattle (SEA)
Courtyard Seattle Downtown Pioneer Square

Courtyard Seattle Downtown Pioneer Square

3 out of 5
per person
May 25 - Jun 1
Roundtrip flight included
Chicago (ORD) to Seattle (SEA)
Residence Inn by Marriott Seattle South/Renton

Residence Inn by Marriott Seattle South/Renton

3 out of 5
per person
May 25 - Jun 1
Roundtrip flight included
Chicago (ORD) to Seattle (SEA)
Residence Inn by Marriott Seattle Bellevue

Residence Inn by Marriott Seattle Bellevue

3 out of 5
per person
May 25 - Jun 1
Roundtrip flight included
Chicago (ORD) to Seattle (SEA)
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