Flights from Collinsville to Seattle

Cheapest flights from Collinsville

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.

Wed, Aug 20 - Sat, Aug 30

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$189 Roundtrip, found 3 days ago

$189

Roundtrip

found 3 days ago

Select Delta flight, departing Wed, Aug 20 from Lambert-St. Louis Intl. to Seattle - Tacoma Intl., returning Sat, Aug 30, priced at $189 found 3 days ago

Wed, Aug 20 - Sun, Aug 31

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$209 Roundtrip, found 3 days ago

$209

Roundtrip

found 3 days ago

Select Delta flight, departing Wed, Aug 20 from Lambert-St. Louis Intl. to Seattle - Tacoma Intl., returning Sun, Aug 31, priced at $209 found 3 days ago

Fri, Jul 11 - Tue, Jul 15

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$210 Roundtrip, found 1 hour ago

$210

Roundtrip

found 1 hour ago

Select Frontier Airlines flight, departing Fri, Jul 11 from Lambert-St. Louis Intl. to Seattle - Tacoma Intl., returning Tue, Jul 15, priced at $210 found 1 hour ago

Mon, Aug 25 - Wed, Aug 27

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$229 Roundtrip, found 3 days ago

$229

Roundtrip

found 3 days ago

Select Delta flight, departing Mon, Aug 25 from Lambert-St. Louis Intl. to Seattle - Tacoma Intl., returning Wed, Aug 27, priced at $229 found 3 days ago

Mon, Jul 7 - Wed, Jul 16

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$249 Roundtrip, found 1 hour ago

$249

Roundtrip

found 1 hour ago

Select Hawaiian Airlines flight, departing Mon, Jul 7 from Lambert-St. Louis Intl. to Seattle - Tacoma Intl., returning Wed, Jul 16, priced at $249 found 1 hour ago

Tue, Jul 8 - Wed, Jul 16

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$253 Roundtrip, found 1 hour ago

$253

Roundtrip

found 1 hour ago

Select American Airlines flight, departing Tue, Jul 8 from Lambert-St. Louis Intl. to Seattle - Tacoma Intl., returning Wed, Jul 16, priced at $253 found 1 hour ago

Tue, Jul 8 - Wed, Jul 16

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$254 Roundtrip, found 1 hour ago

$254

Roundtrip

found 1 hour ago

Select Delta flight, departing Tue, Jul 8 from Lambert-St. Louis Intl. to Seattle - Tacoma Intl., returning Wed, Jul 16, priced at $254 found 1 hour ago

Sat, Jul 5 - Wed, Jul 16

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$263 Roundtrip, found 1 hour ago

$263

Roundtrip

found 1 hour ago

Select Hawaiian Airlines flight, departing Sat, Jul 5 from Lambert-St. Louis Intl. to Seattle - Tacoma Intl., returning Wed, Jul 16, priced at $263 found 1 hour ago

Tue, Jul 8 - Wed, Jul 16

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$269 Roundtrip, found 1 hour ago

$269

Roundtrip

found 1 hour ago

Select United flight, departing Tue, Jul 8 from Lambert-St. Louis Intl. to Seattle - Tacoma Intl., returning Wed, Jul 16, priced at $269 found 1 hour ago

Tue, Jul 8 - Wed, Jul 16

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$277 Roundtrip, found 1 hour ago

$277

Roundtrip

found 1 hour ago

Select American Airlines flight, departing Tue, Jul 8 from Lambert-St. Louis Intl. to Seattle - Tacoma Intl., returning Wed, Jul 16, priced at $277 found 1 hour ago

Tue, Jul 8 - Tue, Jul 15

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$279 Roundtrip, found 1 hour ago

$279

Roundtrip

found 1 hour ago

Select Delta flight, departing Tue, Jul 8 from Lambert-St. Louis Intl. to Seattle - Tacoma Intl., returning Tue, Jul 15, priced at $279 found 1 hour ago

Tue, Jul 8 - Wed, Jul 16

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$280 Roundtrip, found 1 hour ago

$280

Roundtrip

found 1 hour ago

Select United flight, departing Tue, Jul 8 from Lambert-St. Louis Intl. to Seattle - Tacoma Intl., returning Wed, Jul 16, priced at $280 found 1 hour ago

Fri, Jul 11 - Thu, Jul 17

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$280 Roundtrip, found 1 hour ago

$280

Roundtrip

found 1 hour ago

Select Frontier Airlines flight, departing Fri, Jul 11 from Lambert-St. Louis Intl. to Seattle - Tacoma Intl., returning Thu, Jul 17, priced at $280 found 1 hour ago

Tue, Jul 8 - Wed, Jul 16

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$283 Roundtrip, found 1 hour ago

$283

Roundtrip

found 1 hour ago

Select American Airlines flight, departing Tue, Jul 8 from Lambert-St. Louis Intl. to Seattle - Tacoma Intl., returning Wed, Jul 16, priced at $283 found 1 hour ago

Fri, Jul 11 - Fri, Jul 18

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$285 Roundtrip, found 1 hour ago

$285

Roundtrip

found 1 hour ago

Select Frontier Airlines flight, departing Fri, Jul 11 from Lambert-St. Louis Intl. to Seattle - Tacoma Intl., returning Fri, Jul 18, priced at $285 found 1 hour ago

Tue, Jul 8 - Wed, Jul 16

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$289 Roundtrip, found 1 hour ago

$289

Roundtrip

found 1 hour ago

Select United flight, departing Tue, Jul 8 from Lambert-St. Louis Intl. to Seattle - Tacoma Intl., returning Wed, Jul 16, priced at $289 found 1 hour ago

Thu, Jul 10 - Wed, Jul 16

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$289 Roundtrip, found 1 hour ago

$289

Roundtrip

found 1 hour ago

Select Alaska Airlines flight, departing Thu, Jul 10 from Lambert-St. Louis Intl. to Seattle - Tacoma Intl., returning Wed, Jul 16, priced at $289 found 1 hour ago

Sat, Jul 5 - Mon, Jul 14

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$297 Roundtrip, found 1 hour ago

$297

Roundtrip

found 1 hour ago

Select Alaska Airlines flight, departing Sat, Jul 5 from Lambert-St. Louis Intl. to Seattle - Tacoma Intl., returning Mon, Jul 14, priced at $297 found 1 hour ago

Tue, Jul 8 - Wed, Jul 16

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$299 Roundtrip, found 1 hour ago

$299

Roundtrip

found 1 hour ago

Select Delta flight, departing Tue, Jul 8 from Lambert-St. Louis Intl. to Seattle - Tacoma Intl., returning Wed, Jul 16, priced at $299 found 1 hour ago

Tue, Jul 8 - Thu, Jul 17

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$304 Roundtrip, found 1 hour ago

$304

Roundtrip

found 1 hour ago

Select Delta flight, departing Tue, Jul 8 from Lambert-St. Louis Intl. to Seattle - Tacoma Intl., returning Thu, Jul 17, priced at $304 found 1 hour ago