Flights from Chicago to Mill Creek

Cheapest flights from Chicago

These prices were available within the past 7 days. Prices quoted are per person, round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Nov 27 - Tue, Dec 2

ORD

O'Hare Intl.

SEA

Seattle - Tacoma Intl.

$125 Roundtrip, found 17 hours ago

$125

Roundtrip

found 17 hours ago

Select Delta flight, departing Thu, Nov 27 from O'Hare Intl. to Seattle - Tacoma Intl., returning Tue, Dec 2, priced at $125 found 17 hours ago

Tue, Nov 25 - Tue, Dec 2

ORD

O'Hare Intl.

SEA

Seattle - Tacoma Intl.

$157 Roundtrip, found 17 hours ago

$157

Roundtrip

found 17 hours ago

Select Delta flight, departing Tue, Nov 25 from O'Hare Intl. to Seattle - Tacoma Intl., returning Tue, Dec 2, priced at $157 found 17 hours ago

Sun, Nov 23 - Tue, Dec 2

ORD

O'Hare Intl.

SEA

Seattle - Tacoma Intl.

$171 Roundtrip, found 17 hours ago

$171

Roundtrip

found 17 hours ago

Select Delta flight, departing Sun, Nov 23 from O'Hare Intl. to Seattle - Tacoma Intl., returning Tue, Dec 2, priced at $171 found 17 hours ago

Sat, Sep 6 - Wed, Sep 17

ORD

O'Hare Intl.

SEA

Seattle - Tacoma Intl.

$189 Roundtrip, found 5 days ago

$189

Roundtrip

found 5 days ago

Select Alaska Airlines flight, departing Sat, Sep 6 from O'Hare Intl. to Seattle - Tacoma Intl., returning Wed, Sep 17, priced at $189 found 5 days ago

Mon, Sep 22 - Sat, Sep 27

ORD

O'Hare Intl.

SEA

Seattle - Tacoma Intl.

$203 Roundtrip, found 5 days ago

$203

Roundtrip

found 5 days ago

Select Hawaiian Airlines flight, departing Mon, Sep 22 from O'Hare Intl. to Seattle - Tacoma Intl., returning Sat, Sep 27, priced at $203 found 5 days ago

Fri, Aug 22 - Tue, Aug 26

ORD

O'Hare Intl.

SEA

Seattle - Tacoma Intl.

$203 Roundtrip, found 5 days ago

$203

Roundtrip

found 5 days ago

Select United flight, departing Fri, Aug 22 from O'Hare Intl. to Seattle - Tacoma Intl., returning Tue, Aug 26, priced at $203 found 5 days ago

Fri, Aug 22 - Tue, Aug 26

ORD

O'Hare Intl.

SEA

Seattle - Tacoma Intl.

$203 Roundtrip, found 5 days ago

$203

Roundtrip

found 5 days ago

Select American Airlines flight, departing Fri, Aug 22 from O'Hare Intl. to Seattle - Tacoma Intl., returning Tue, Aug 26, priced at $203 found 5 days ago

Sat, Nov 22 - Wed, Dec 3

ORD

O'Hare Intl.

SEA

Seattle - Tacoma Intl.

$205 Roundtrip, found 17 hours ago

$205

Roundtrip

found 17 hours ago

Select Hawaiian Airlines flight, departing Sat, Nov 22 from O'Hare Intl. to Seattle - Tacoma Intl., returning Wed, Dec 3, priced at $205 found 17 hours ago

Sat, Nov 22 - Thu, Dec 4

ORD

O'Hare Intl.

SEA

Seattle - Tacoma Intl.

$212 Roundtrip, found 17 hours ago

$212

Roundtrip

found 17 hours ago

Select Hawaiian Airlines flight, departing Sat, Nov 22 from O'Hare Intl. to Seattle - Tacoma Intl., returning Thu, Dec 4, priced at $212 found 17 hours ago

Mon, Sep 22 - Mon, Sep 29

ORD

O'Hare Intl.

SEA

Seattle - Tacoma Intl.

$217 Roundtrip, found 5 days ago

$217

Roundtrip

found 5 days ago

Select Hawaiian Airlines flight, departing Mon, Sep 22 from O'Hare Intl. to Seattle - Tacoma Intl., returning Mon, Sep 29, priced at $217 found 5 days ago

Tue, Nov 25 - Fri, Nov 28

ORD

O'Hare Intl.

SEA

Seattle - Tacoma Intl.

$219 Roundtrip, found 1 day ago

$219

Roundtrip

found 1 day ago

Select Hawaiian Airlines flight, departing Tue, Nov 25 from O'Hare Intl. to Seattle - Tacoma Intl., returning Fri, Nov 28, priced at $219 found 1 day ago

Thu, Nov 27 - Fri, Nov 28

ORD

O'Hare Intl.

SEA

Seattle - Tacoma Intl.

$221 Roundtrip, found 17 hours ago

$221

Roundtrip

found 17 hours ago

Select Delta flight, departing Thu, Nov 27 from O'Hare Intl. to Seattle - Tacoma Intl., returning Fri, Nov 28, priced at $221 found 17 hours ago

Thu, Sep 25 - Mon, Sep 29

ORD

O'Hare Intl.

SEA

Seattle - Tacoma Intl.

$227 Roundtrip, found 5 days ago

$227

Roundtrip

found 5 days ago

Select Alaska Airlines flight, departing Thu, Sep 25 from O'Hare Intl. to Seattle - Tacoma Intl., returning Mon, Sep 29, priced at $227 found 5 days ago

Fri, Aug 22 - Tue, Aug 26

ORD

O'Hare Intl.

SEA

Seattle - Tacoma Intl.

$227 Roundtrip, found 5 days ago

$227

Roundtrip

found 5 days ago

Select Alaska Airlines flight, departing Fri, Aug 22 from O'Hare Intl. to Seattle - Tacoma Intl., returning Tue, Aug 26, priced at $227 found 5 days ago

Tue, Nov 25 - Sun, Nov 30

ORD

O'Hare Intl.

SEA

Seattle - Tacoma Intl.

$229 Roundtrip, found 17 hours ago

$229

Roundtrip

found 17 hours ago

Select Alaska Airlines flight, departing Tue, Nov 25 from O'Hare Intl. to Seattle - Tacoma Intl., returning Sun, Nov 30, priced at $229 found 17 hours ago

Tue, Nov 25 - Sun, Nov 30

ORD

O'Hare Intl.

SEA

Seattle - Tacoma Intl.

$229 Roundtrip, found 17 hours ago

$229

Roundtrip

found 17 hours ago

Select United flight, departing Tue, Nov 25 from O'Hare Intl. to Seattle - Tacoma Intl., returning Sun, Nov 30, priced at $229 found 17 hours ago

Sat, Aug 16 - Sat, Aug 23

ORD

O'Hare Intl.

SEA

Seattle - Tacoma Intl.

$248 Roundtrip, found 3 days ago

$248

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Sat, Aug 16 from O'Hare Intl. to Seattle - Tacoma Intl., returning Sat, Aug 23, priced at $248 found 3 days ago

Mon, Sep 8 - Fri, Sep 19

MDW

Midway Intl.

SEA

Seattle - Tacoma Intl.

$268 Roundtrip, found 5 days ago

$268

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Mon, Sep 8 from Midway Intl. to Seattle - Tacoma Intl., returning Fri, Sep 19, priced at $268 found 5 days ago

Fri, Aug 15 - Fri, Aug 22

ORD

O'Hare Intl.

PAE

Seattle Paine Field Intl. Airport

$268 Roundtrip, found 3 days ago

$268

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Fri, Aug 15 from O'Hare Intl. to Seattle Paine Field Intl. Airport, returning Fri, Aug 22, priced at $268 found 3 days ago

Tue, Nov 25 - Sun, Nov 30

ORD

O'Hare Intl.

SEA

Seattle - Tacoma Intl.

$380 Roundtrip, found 17 hours ago

$380

Roundtrip

found 17 hours ago

Select Sun Country Airlines flight, departing Tue, Nov 25 from O'Hare Intl. to Seattle - Tacoma Intl., returning Sun, Nov 30, priced at $380 found 17 hours ago