Flights from St. Louis to Seattle

Cheapest flights from St. Louis

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.

Tue, Aug 12 - Tue, Aug 19

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$177 Roundtrip, found 4 days ago

$177

Roundtrip

found 4 days ago

Select Delta flight, departing Tue, Aug 12 from Lambert-St. Louis Intl. to Seattle - Tacoma Intl., returning Tue, Aug 19, priced at $177 found 4 days ago

Sun, Aug 10 - Tue, Aug 19

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$183 Roundtrip, found 4 days ago

$183

Roundtrip

found 4 days ago

Select Delta flight, departing Sun, Aug 10 from Lambert-St. Louis Intl. to Seattle - Tacoma Intl., returning Tue, Aug 19, priced at $183 found 4 days ago

Tue, Aug 12 - Thu, Aug 21

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$248 Roundtrip, found 4 days ago

$248

Roundtrip

found 4 days ago

Select Delta flight, departing Tue, Aug 12 from Lambert-St. Louis Intl. to Seattle - Tacoma Intl., returning Thu, Aug 21, priced at $248 found 4 days ago

Sun, Aug 10 - Thu, Aug 21

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$249 Roundtrip, found 4 days ago

$249

Roundtrip

found 4 days ago

Select Hawaiian Airlines flight, departing Sun, Aug 10 from Lambert-St. Louis Intl. to Seattle - Tacoma Intl., returning Thu, Aug 21, priced at $249 found 4 days ago

Sat, Aug 9 - Mon, Aug 18

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$259 Roundtrip, found 4 days ago

$259

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Sat, Aug 9 from Lambert-St. Louis Intl. to Seattle - Tacoma Intl., returning Mon, Aug 18, priced at $259 found 4 days ago

Mon, Aug 11 - Mon, Aug 18

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$269 Roundtrip, found 4 days ago

$269

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Mon, Aug 11 from Lambert-St. Louis Intl. to Seattle - Tacoma Intl., returning Mon, Aug 18, priced at $269 found 4 days ago

Sat, Aug 9 - Sun, Aug 17

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$280 Roundtrip, found 4 days ago

$280

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Sat, Aug 9 from Lambert-St. Louis Intl. to Seattle - Tacoma Intl., returning Sun, Aug 17, priced at $280 found 4 days ago

Tue, Aug 12 - Mon, Aug 18

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$289 Roundtrip, found 4 days ago

$289

Roundtrip

found 4 days ago

Select Hawaiian Airlines flight, departing Tue, Aug 12 from Lambert-St. Louis Intl. to Seattle - Tacoma Intl., returning Mon, Aug 18, priced at $289 found 4 days ago