Flights from Chicago to Cosmopolis

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.

$184 Roundtrip, found 1 day ago

$184

Roundtrip

found 1 day ago

Select Delta flight, departing Thu, Nov 27 from O'Hare Intl. to Seattle - Tacoma Intl., returning Tue, Dec 2, priced at $184 found 1 day ago

Tue, Aug 12 - Wed, Aug 20

ORD

O'Hare Intl.

SEA

Seattle - Tacoma Intl.

$189 Roundtrip, found 1 day ago

$189

Roundtrip

found 1 day ago

Select Alaska Airlines flight, departing Tue, Aug 12 from O'Hare Intl. to Seattle - Tacoma Intl., returning Wed, Aug 20, priced at $189 found 1 day ago

Tue, Jul 15 - Tue, Jul 22

ORD

O'Hare Intl.

SEA

Seattle - Tacoma Intl.

$189 Roundtrip, found 3 days ago

$189

Roundtrip

found 3 days ago

Select Hawaiian Airlines flight, departing Tue, Jul 15 from O'Hare Intl. to Seattle - Tacoma Intl., returning Tue, Jul 22, priced at $189 found 3 days ago

Wed, Jul 23 - Tue, Jul 29

ORD

O'Hare Intl.

SEA

Seattle - Tacoma Intl.

$199 Roundtrip, found 3 days ago

$199

Roundtrip

found 3 days ago

Select Hawaiian Airlines flight, departing Wed, Jul 23 from O'Hare Intl. to Seattle - Tacoma Intl., returning Tue, Jul 29, priced at $199 found 3 days ago

Thu, Nov 27 - Thu, Dec 4

ORD

O'Hare Intl.

SEA

Seattle - Tacoma Intl.

$214 Roundtrip, found 1 day ago

$214

Roundtrip

found 1 day ago

Select Delta flight, departing Thu, Nov 27 from O'Hare Intl. to Seattle - Tacoma Intl., returning Thu, Dec 4, priced at $214 found 1 day ago

Sat, Jul 12 - Tue, Jul 22

ORD

O'Hare Intl.

SEA

Seattle - Tacoma Intl.

$219 Roundtrip, found 3 days ago

$219

Roundtrip

found 3 days ago

Select Hawaiian Airlines flight, departing Sat, Jul 12 from O'Hare Intl. to Seattle - Tacoma Intl., returning Tue, Jul 22, priced at $219 found 3 days ago

Tue, Aug 12 - Mon, Aug 18

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, Aug 12 from O'Hare Intl. to Seattle - Tacoma Intl., returning Mon, Aug 18, priced at $219 found 1 day ago

Thu, Nov 20 - Tue, Nov 25

ORD

O'Hare Intl.

SEA

Seattle - Tacoma Intl.

$219 Roundtrip, found 1 day ago

$219

Roundtrip

found 1 day ago

Select American Airlines flight, departing Thu, Nov 20 from O'Hare Intl. to Seattle - Tacoma Intl., returning Tue, Nov 25, priced at $219 found 1 day ago

Mon, Jul 21 - Tue, Jul 29

ORD

O'Hare Intl.

SEA

Seattle - Tacoma Intl.

$229 Roundtrip, found 3 days ago

$229

Roundtrip

found 3 days ago

Select Hawaiian Airlines flight, departing Mon, Jul 21 from O'Hare Intl. to Seattle - Tacoma Intl., returning Tue, Jul 29, priced at $229 found 3 days ago

Thu, Nov 20 - Tue, Nov 25

ORD

O'Hare Intl.

SEA

Seattle - Tacoma Intl.

$237 Roundtrip, found 1 day ago

$237

Roundtrip

found 1 day ago

Select United flight, departing Thu, Nov 20 from O'Hare Intl. to Seattle - Tacoma Intl., returning Tue, Nov 25, priced at $237 found 1 day ago

Thu, Nov 20 - Tue, Nov 25

ORD

O'Hare Intl.

SEA

Seattle - Tacoma Intl.

$246 Roundtrip, found 1 day ago

$246

Roundtrip

found 1 day ago

Select United flight, departing Thu, Nov 20 from O'Hare Intl. to Seattle - Tacoma Intl., returning Tue, Nov 25, priced at $246 found 1 day ago

Sat, Aug 16 - Thu, Aug 21

MDW

Midway Intl.

SEA

Seattle - Tacoma Intl.

$249 Roundtrip, found 1 day ago

$249

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Sat, Aug 16 from Midway Intl. to Seattle - Tacoma Intl., returning Thu, Aug 21, priced at $249 found 1 day ago

Sat, Jul 12 - Sat, Jul 19

ORD

O'Hare Intl.

SEA

Seattle - Tacoma Intl.

$250 Roundtrip, found 3 days ago

$250

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Sat, Jul 12 from O'Hare Intl. to Seattle - Tacoma Intl., returning Sat, Jul 19, priced at $250 found 3 days ago

Tue, Jul 15 - Sun, Jul 20

ORD

O'Hare Intl.

SEA

Seattle - Tacoma Intl.

$253 Roundtrip, found 3 days ago

$253

Roundtrip

found 3 days ago

Select Delta flight, departing Tue, Jul 15 from O'Hare Intl. to Seattle - Tacoma Intl., returning Sun, Jul 20, priced at $253 found 3 days ago

Thu, Aug 14 - Fri, Aug 22

MDW

Midway Intl.

PAE

Seattle Paine Field Intl. Airport

$257 Roundtrip, found 1 day ago

$257

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Thu, Aug 14 from Midway Intl. to Seattle Paine Field Intl. Airport, returning Fri, Aug 22, priced at $257 found 1 day ago

Wed, Jul 16 - Sat, Jul 19

ORD

O'Hare Intl.

SEA

Seattle - Tacoma Intl.

$259 Roundtrip, found 3 days ago

$259

Roundtrip

found 3 days ago

Select Hawaiian Airlines flight, departing Wed, Jul 16 from O'Hare Intl. to Seattle - Tacoma Intl., returning Sat, Jul 19, priced at $259 found 3 days ago

Sat, Jun 14 - Fri, Jun 20

ORD

O'Hare Intl.

SEA

Seattle - Tacoma Intl.

$260 Roundtrip, found 4 days ago

$260

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Sat, Jun 14 from O'Hare Intl. to Seattle - Tacoma Intl., returning Fri, Jun 20, priced at $260 found 4 days ago

Sat, Jun 14 - Wed, Jun 18

ORD

O'Hare Intl.

SEA

Seattle - Tacoma Intl.

$261 Roundtrip, found 4 days ago

$261

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Sat, Jun 14 from O'Hare Intl. to Seattle - Tacoma Intl., returning Wed, Jun 18, priced at $261 found 4 days ago

Sat, Jul 26 - Tue, Jul 29

ORD

O'Hare Intl.

SEA

Seattle - Tacoma Intl.

$263 Roundtrip, found 3 days ago

$263

Roundtrip

found 3 days ago

Select Hawaiian Airlines flight, departing Sat, Jul 26 from O'Hare Intl. to Seattle - Tacoma Intl., returning Tue, Jul 29, priced at $263 found 3 days ago

Thu, Jul 24 - Thu, Jul 31

ORD

O'Hare Intl.

SEA

Seattle - Tacoma Intl.

$433 Roundtrip, found 3 days ago

$433

Roundtrip

found 3 days ago

Select Sun Country Airlines flight, departing Thu, Jul 24 from O'Hare Intl. to Seattle - Tacoma Intl., returning Thu, Jul 31, priced at $433 found 3 days ago