Flights from St. Louis to Sumner

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 2 days ago

$258

Roundtrip

found 2 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 2 days ago

Fri, Aug 8 - Fri, Aug 15

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$268 Roundtrip, found 2 days ago

$268

Roundtrip

found 2 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 2 days ago

Tue, Aug 12 - Tue, Aug 19

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$292 Roundtrip, found 2 days ago

$292

Roundtrip

found 2 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 2 days ago

Sun, Aug 10 - Tue, Aug 19

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$298 Roundtrip, found 2 days ago

$298

Roundtrip

found 2 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 2 days ago

Fri, Aug 8 - Sun, Aug 17

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$308 Roundtrip, found 2 days ago

$308

Roundtrip

found 2 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 2 days ago

Tue, Aug 12 - Wed, Aug 13

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$343 Roundtrip, found 2 days ago

$343

Roundtrip

found 2 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 2 days ago

Sun, Aug 10 - Sun, Aug 17

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$348 Roundtrip, found 2 days ago

$348

Roundtrip

found 2 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 2 days ago

Wed, Aug 6 - Fri, Aug 15

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$358 Roundtrip, found 2 days ago

$358

Roundtrip

found 2 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 2 days ago

Tue, Aug 12 - Mon, Aug 18

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$393 Roundtrip, found 2 days ago

$393

Roundtrip

found 2 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 2 days ago

Wed, Aug 6 - Sun, Aug 17

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$398 Roundtrip, found 2 days ago

$398

Roundtrip

found 2 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 2 days ago

Fri, Aug 1 - Fri, Aug 8

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$414 Roundtrip, found 4 days ago

$414

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Fri, Aug 1 from Lambert-St. Louis Intl. to Seattle - Tacoma Intl., returning Fri, Aug 8, priced at $414 found 4 days ago

Fri, Aug 1 - Fri, Aug 8

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$429 Roundtrip, found 4 days ago

$429

Roundtrip

found 4 days ago

Select Delta flight, departing Fri, Aug 1 from Lambert-St. Louis Intl. to Seattle - Tacoma Intl., returning Fri, Aug 8, priced at $429 found 4 days ago

Mon, Aug 11 - Wed, Aug 13

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$454 Roundtrip, found 2 days ago

$454

Roundtrip

found 2 days ago

Select Delta flight, departing Mon, Aug 11 from Lambert-St. Louis Intl. to Seattle - Tacoma Intl., returning Wed, Aug 13, priced at $454 found 2 days ago

Tue, Aug 12 - Sun, Aug 17

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$467 Roundtrip, found 2 days ago

$467

Roundtrip

found 2 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 2 days ago

Mon, Aug 4 - Wed, Aug 6

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$469 Roundtrip, found 4 days ago

$469

Roundtrip

found 4 days ago

Select Delta flight, departing Mon, Aug 4 from Lambert-St. Louis Intl. to Seattle - Tacoma Intl., returning Wed, Aug 6, priced at $469 found 4 days ago

Tue, Aug 12 - Sat, Aug 16

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$473 Roundtrip, found 2 days ago

$473

Roundtrip

found 2 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 2 days ago

Fri, Aug 1 - Fri, Aug 8

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$474 Roundtrip, found 4 days ago

$474

Roundtrip

found 4 days ago

Select Delta flight, departing Fri, Aug 1 from Lambert-St. Louis Intl. to Seattle - Tacoma Intl., returning Fri, Aug 8, priced at $474 found 4 days ago

Sat, Aug 9 - Sat, Aug 16

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$482 Roundtrip, found 2 days ago

$482

Roundtrip

found 2 days ago

Select Delta flight, departing Sat, Aug 9 from Lambert-St. Louis Intl. to Seattle - Tacoma Intl., returning Sat, Aug 16, priced at $482 found 2 days ago

Sat, Aug 9 - Sat, Aug 16

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$528 Roundtrip, found 2 days ago

$528

Roundtrip

found 2 days ago

Select American Airlines flight, departing Sat, Aug 9 from Lambert-St. Louis Intl. to Seattle - Tacoma Intl., returning Sat, Aug 16, priced at $528 found 2 days ago

Sat, Aug 9 - Sat, Aug 16

STL

Lambert-St. Louis Intl.

SEA

Seattle - Tacoma Intl.

$597 Roundtrip, found 2 days ago

$597

Roundtrip

found 2 days ago

Select Alaska Airlines flight, departing Sat, Aug 9 from Lambert-St. Louis Intl. to Seattle - Tacoma Intl., returning Sat, Aug 16, priced at $597 found 2 days ago