Flights from Chicago to San Juan Island

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.

Sat, Sep 6 - Tue, Sep 16

ORD

O'Hare Intl.

SEA

Seattle - Tacoma Intl.

$169 Roundtrip, just found

$169

Roundtrip

just found

Select Alaska Airlines flight, departing Sat, Sep 6 from O'Hare Intl. to Seattle - Tacoma Intl., returning Tue, Sep 16, priced at $169 just found

Tue, Jun 17 - Mon, Jun 30

ORD

O'Hare Intl.

SEA

Seattle - Tacoma Intl.

$174 Roundtrip, found 1 day ago

$174

Roundtrip

found 1 day ago

Select Alaska Airlines flight, departing Tue, Jun 17 from O'Hare Intl. to Seattle - Tacoma Intl., returning Mon, Jun 30, priced at $174 found 1 day ago

Fri, Sep 5 - Tue, Sep 16

ORD

O'Hare Intl.

SEA

Seattle - Tacoma Intl.

$199 Roundtrip, just found

$199

Roundtrip

just found

Select Alaska Airlines flight, departing Fri, Sep 5 from O'Hare Intl. to Seattle - Tacoma Intl., returning Tue, Sep 16, priced at $199 just found

Fri, Jul 11 - Tue, Jul 15

ORD

O'Hare Intl.

SEA

Seattle - Tacoma Intl.

$199 Roundtrip, found 16 hours ago

$199

Roundtrip

found 16 hours ago

Select United flight, departing Fri, Jul 11 from O'Hare Intl. to Seattle - Tacoma Intl., returning Tue, Jul 15, priced at $199 found 16 hours ago

Fri, Jul 11 - Tue, Jul 15

ORD

O'Hare Intl.

SEA

Seattle - Tacoma Intl.

$199 Roundtrip, found 16 hours ago

$199

Roundtrip

found 16 hours ago

Select Delta flight, departing Fri, Jul 11 from O'Hare Intl. to Seattle - Tacoma Intl., returning Tue, Jul 15, priced at $199 found 16 hours ago

Fri, Jul 11 - Tue, Jul 15

ORD

O'Hare Intl.

SEA

Seattle - Tacoma Intl.

$203 Roundtrip, found 16 hours ago

$203

Roundtrip

found 16 hours ago

Select American Airlines flight, departing Fri, Jul 11 from O'Hare Intl. to Seattle - Tacoma Intl., returning Tue, Jul 15, priced at $203 found 16 hours ago

Thu, Jun 19 - Mon, Jun 30

ORD

O'Hare Intl.

SEA

Seattle - Tacoma Intl.

$204 Roundtrip, found 1 day ago

$204

Roundtrip

found 1 day ago

Select Alaska Airlines flight, departing Thu, Jun 19 from O'Hare Intl. to Seattle - Tacoma Intl., returning Mon, Jun 30, priced at $204 found 1 day ago

Fri, Jul 11 - Tue, Jul 15

ORD

O'Hare Intl.

SEA

Seattle - Tacoma Intl.

$205 Roundtrip, found 16 hours ago

$205

Roundtrip

found 16 hours ago

Select American Airlines flight, departing Fri, Jul 11 from O'Hare Intl. to Seattle - Tacoma Intl., returning Tue, Jul 15, priced at $205 found 16 hours ago

Fri, Jul 11 - Tue, Jul 15

ORD

O'Hare Intl.

SEA

Seattle - Tacoma Intl.

$209 Roundtrip, found 16 hours ago

$209

Roundtrip

found 16 hours ago

Select Alaska Airlines flight, departing Fri, Jul 11 from O'Hare Intl. to Seattle - Tacoma Intl., returning Tue, Jul 15, priced at $209 found 16 hours ago

Fri, Jul 11 - Tue, Jul 15

ORD

O'Hare Intl.

SEA

Seattle - Tacoma Intl.

$209 Roundtrip, found 16 hours ago

$209

Roundtrip

found 16 hours ago

Select Alaska Airlines flight, departing Fri, Jul 11 from O'Hare Intl. to Seattle - Tacoma Intl., returning Tue, Jul 15, priced at $209 found 16 hours ago

Sun, Jun 22 - Mon, Jun 30

ORD

O'Hare Intl.

SEA

Seattle - Tacoma Intl.

$214 Roundtrip, found 1 day ago

$214

Roundtrip

found 1 day ago

Select Hawaiian Airlines flight, departing Sun, Jun 22 from O'Hare Intl. to Seattle - Tacoma Intl., returning Mon, Jun 30, priced at $214 found 1 day ago

Fri, Jun 20 - Sat, Jun 28

ORD

O'Hare Intl.

SEA

Seattle - Tacoma Intl.

$224 Roundtrip, found 1 day ago

$224

Roundtrip

found 1 day ago

Select American Airlines flight, departing Fri, Jun 20 from O'Hare Intl. to Seattle - Tacoma Intl., returning Sat, Jun 28, priced at $224 found 1 day ago

Fri, Sep 5 - Mon, Sep 15

ORD

O'Hare Intl.

SEA

Seattle - Tacoma Intl.

$229 Roundtrip, just found

$229

Roundtrip

just found

Select Alaska Airlines flight, departing Fri, Sep 5 from O'Hare Intl. to Seattle - Tacoma Intl., returning Mon, Sep 15, priced at $229 just found

Fri, Jul 11 - Tue, Jul 15

ORD

O'Hare Intl.

SEA

Seattle - Tacoma Intl.

$233 Roundtrip, found 16 hours ago

$233

Roundtrip

found 16 hours ago

Select American Airlines flight, departing Fri, Jul 11 from O'Hare Intl. to Seattle - Tacoma Intl., returning Tue, Jul 15, priced at $233 found 16 hours ago

Fri, Jul 11 - Tue, Jul 15

ORD

O'Hare Intl.

SEA

Seattle - Tacoma Intl.

$235 Roundtrip, found 16 hours ago

$235

Roundtrip

found 16 hours ago

Select American Airlines flight, departing Fri, Jul 11 from O'Hare Intl. to Seattle - Tacoma Intl., returning Tue, Jul 15, priced at $235 found 16 hours ago

Fri, Jul 11 - Tue, Jul 15

ORD

O'Hare Intl.

SEA

Seattle - Tacoma Intl.

$237 Roundtrip, found 16 hours ago

$237

Roundtrip

found 16 hours ago

Select American Airlines flight, departing Fri, Jul 11 from O'Hare Intl. to Seattle - Tacoma Intl., returning Tue, Jul 15, priced at $237 found 16 hours ago

Fri, Jun 13 - Sat, Jun 14

MDW

Midway Intl.

SEA

Seattle - Tacoma Intl.

$248 Roundtrip, found 4 days ago

$248

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Fri, Jun 13 from Midway Intl. to Seattle - Tacoma Intl., returning Sat, Jun 14, priced at $248 found 4 days ago

Mon, Jun 16 - Sat, Jun 21

ORD

O'Hare Intl.

SEA

Seattle - Tacoma Intl.

$248 Roundtrip, found 1 day ago

$248

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Mon, Jun 16 from O'Hare Intl. to Seattle - Tacoma Intl., returning Sat, Jun 21, priced at $248 found 1 day ago

Thu, Jun 12 - Sat, Jun 21

ORD

O'Hare Intl.

SEA

Seattle - Tacoma Intl.

$268 Roundtrip, found 4 days ago

$268

Roundtrip

found 4 days ago

Select Spirit Airlines flight, departing Thu, Jun 12 from O'Hare Intl. to Seattle - Tacoma Intl., returning Sat, Jun 21, priced at $268 found 4 days ago

Fri, Jun 20 - Sat, Jun 28

ORD

O'Hare Intl.

SEA

Seattle - Tacoma Intl.

$473 Roundtrip, found 1 day ago

$473

Roundtrip

found 1 day ago

Select Sun Country Airlines flight, departing Fri, Jun 20 from O'Hare Intl. to Seattle - Tacoma Intl., returning Sat, Jun 28, priced at $473 found 1 day ago