Flights from St. Louis to Mukilteo

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.

Fri, Aug 8 - Tue, Aug 19

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$258 Roundtrip, found 5 days ago

$258

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Fri, Aug 8 from Lambert-St. Louis Intl. to Seattle - Tacoma Intl., returning Tue, Aug 19, priced at $258 found 5 days ago

Fri, Aug 8 - Fri, Aug 15

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$268 Roundtrip, found 5 days ago

$268

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Fri, Aug 8 from Lambert-St. Louis Intl. to Seattle - Tacoma Intl., returning Fri, Aug 15, priced at $268 found 5 days ago

Tue, Aug 12 - Tue, Aug 19

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$292 Roundtrip, found 5 days ago

$292

Roundtrip

found 5 days ago

Select Delta flight, departing Tue, Aug 12 from Lambert-St. Louis Intl. to Seattle - Tacoma Intl., returning Tue, Aug 19, priced at $292 found 5 days ago

Sun, Aug 10 - Tue, Aug 19

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$298 Roundtrip, found 5 days ago

$298

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Sun, Aug 10 from Lambert-St. Louis Intl. to Seattle - Tacoma Intl., returning Tue, Aug 19, priced at $298 found 5 days ago

Fri, Aug 8 - Sun, Aug 17

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$308 Roundtrip, found 5 days ago

$308

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Fri, Aug 8 from Lambert-St. Louis Intl. to Seattle - Tacoma Intl., returning Sun, Aug 17, priced at $308 found 5 days ago

Mon, Jun 15 - Mon, Jun 22

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$324 Roundtrip, found 1 day ago

$324

Roundtrip

found 1 day ago

Select Delta flight, departing Mon, Jun 15 from Lambert-St. Louis Intl. to Seattle - Tacoma Intl., returning Mon, Jun 22, priced at $324 found 1 day ago

Tue, Aug 12 - Wed, Aug 13

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$343 Roundtrip, found 5 days ago

$343

Roundtrip

found 5 days ago

Select Delta flight, departing Tue, Aug 12 from Lambert-St. Louis Intl. to Seattle - Tacoma Intl., returning Wed, Aug 13, priced at $343 found 5 days ago

Sun, Aug 10 - Sun, Aug 17

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$348 Roundtrip, found 5 days ago

$348

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Sun, Aug 10 from Lambert-St. Louis Intl. to Seattle - Tacoma Intl., returning Sun, Aug 17, priced at $348 found 5 days ago

Wed, Aug 6 - Fri, Aug 15

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$358 Roundtrip, found 5 days ago

$358

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Wed, Aug 6 from Lambert-St. Louis Intl. to Seattle - Tacoma Intl., returning Fri, Aug 15, priced at $358 found 5 days ago

Mon, Jun 15 - Mon, Jun 22

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$364 Roundtrip, found 1 day ago

$364

Roundtrip

found 1 day ago

Select Delta flight, departing Mon, Jun 15 from Lambert-St. Louis Intl. to Seattle - Tacoma Intl., returning Mon, Jun 22, priced at $364 found 1 day ago

Mon, Jun 15 - Mon, Jun 22

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$369 Roundtrip, found 1 day ago

$369

Roundtrip

found 1 day ago

Select Delta flight, departing Mon, Jun 15 from Lambert-St. Louis Intl. to Seattle - Tacoma Intl., returning Mon, Jun 22, priced at $369 found 1 day ago

Tue, Aug 12 - Mon, Aug 18

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$393 Roundtrip, found 5 days ago

$393

Roundtrip

found 5 days ago

Select Delta flight, departing Tue, Aug 12 from Lambert-St. Louis Intl. to Seattle - Tacoma Intl., returning Mon, Aug 18, priced at $393 found 5 days ago

Wed, Aug 6 - Sun, Aug 17

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$398 Roundtrip, found 5 days ago

$398

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Wed, Aug 6 from Lambert-St. Louis Intl. to Seattle - Tacoma Intl., returning Sun, Aug 17, priced at $398 found 5 days ago

Mon, Jun 15 - Mon, Jun 22

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$409 Roundtrip, found 1 day ago

$409

Roundtrip

found 1 day ago

Select American Airlines flight, departing Mon, Jun 15 from Lambert-St. Louis Intl. to Seattle - Tacoma Intl., returning Mon, Jun 22, priced at $409 found 1 day ago

Mon, Jun 15 - Mon, Jun 22

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$422 Roundtrip, found 1 day ago

$422

Roundtrip

found 1 day ago

Select United flight, departing Mon, Jun 15 from Lambert-St. Louis Intl. to Seattle - Tacoma Intl., returning Mon, Jun 22, priced at $422 found 1 day ago

Mon, Jun 15 - Mon, Jun 22

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$428 Roundtrip, found 1 day ago

$428

Roundtrip

found 1 day ago

Select Alaska Airlines flight, departing Mon, Jun 15 from Lambert-St. Louis Intl. to Seattle - Tacoma Intl., returning Mon, Jun 22, priced at $428 found 1 day ago

Mon, Jun 15 - Mon, Jun 22

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$442 Roundtrip, found 1 day ago

$442

Roundtrip

found 1 day ago

Select Alaska Airlines flight, departing Mon, Jun 15 from Lambert-St. Louis Intl. to Seattle - Tacoma Intl., returning Mon, Jun 22, priced at $442 found 1 day ago

Mon, Jun 15 - Mon, Jun 22

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$463 Roundtrip, found 1 day ago

$463

Roundtrip

found 1 day ago

Select American Airlines flight, departing Mon, Jun 15 from Lambert-St. Louis Intl. to Seattle - Tacoma Intl., returning Mon, Jun 22, priced at $463 found 1 day ago

Tue, Aug 12 - Sun, Aug 17

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$467 Roundtrip, found 5 days ago

$467

Roundtrip

found 5 days ago

Select Hawaiian Airlines flight, departing Tue, Aug 12 from Lambert-St. Louis Intl. to Seattle - Tacoma Intl., returning Sun, Aug 17, priced at $467 found 5 days ago

Tue, Aug 12 - Sat, Aug 16

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$473 Roundtrip, found 5 days ago

$473

Roundtrip

found 5 days ago

Select United flight, departing Tue, Aug 12 from Lambert-St. Louis Intl. to Seattle - Tacoma Intl., returning Sat, Aug 16, priced at $473 found 5 days ago