Flights from St. Louis to Portland

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.

Wed, Aug 6 - Tue, Aug 19

STL

Lambert-St. Louis Intl.

PDX

Portland Intl.

$248 Roundtrip, found 1 day ago

$248

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Wed, Aug 6 from Lambert-St. Louis Intl. to Portland Intl., returning Tue, Aug 19, priced at $248 found 1 day ago

Wed, Aug 6 - Fri, Aug 15

STL

Lambert-St. Louis Intl.

PDX

Portland Intl.

$258 Roundtrip, found 1 day ago

$258

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Wed, Aug 6 from Lambert-St. Louis Intl. to Portland Intl., returning Fri, Aug 15, priced at $258 found 1 day ago

Fri, Aug 8 - Fri, Aug 15

STL

Lambert-St. Louis Intl.

PDX

Portland Intl.

$268 Roundtrip, found 1 day ago

$268

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Fri, Aug 8 from Lambert-St. Louis Intl. to Portland Intl., returning Fri, Aug 15, priced at $268 found 1 day ago

Wed, Aug 6 - Sat, Aug 16

STL

Lambert-St. Louis Intl.

PDX

Portland Intl.

$328 Roundtrip, found 1 day ago

$328

Roundtrip

found 1 day ago

Select Delta flight, departing Wed, Aug 6 from Lambert-St. Louis Intl. to Portland Intl., returning Sat, Aug 16, priced at $328 found 1 day ago

Tue, Aug 5 - Tue, Aug 19

STL

Lambert-St. Louis Intl.

PDX

Portland Intl.

$341 Roundtrip, found 1 day ago

$341

Roundtrip

found 1 day ago

Select Delta flight, departing Tue, Aug 5 from Lambert-St. Louis Intl. to Portland Intl., returning Tue, Aug 19, priced at $341 found 1 day ago

Thu, Aug 7 - Mon, Aug 18

STL

Lambert-St. Louis Intl.

PDX

Portland Intl.

$351 Roundtrip, found 1 day ago

$351

Roundtrip

found 1 day ago

Select Delta flight, departing Thu, Aug 7 from Lambert-St. Louis Intl. to Portland Intl., returning Mon, Aug 18, priced at $351 found 1 day ago

Thu, Aug 7 - Mon, Aug 18

STL

Lambert-St. Louis Intl.

PDX

Portland Intl.

$358 Roundtrip, found 1 day ago

$358

Roundtrip

found 1 day ago

Select Delta flight, departing Thu, Aug 7 from Lambert-St. Louis Intl. to Portland Intl., returning Mon, Aug 18, priced at $358 found 1 day ago

Mon, Aug 4 - Sat, Aug 16

STL

Lambert-St. Louis Intl.

PDX

Portland Intl.

$366 Roundtrip, found 1 day ago

$366

Roundtrip

found 1 day ago

Select Delta flight, departing Mon, Aug 4 from Lambert-St. Louis Intl. to Portland Intl., returning Sat, Aug 16, priced at $366 found 1 day ago

Thu, Aug 7 - Mon, Aug 18

STL

Lambert-St. Louis Intl.

PDX

Portland Intl.

$382 Roundtrip, found 1 day ago

$382

Roundtrip

found 1 day ago

Select Alaska Airlines flight, departing Thu, Aug 7 from Lambert-St. Louis Intl. to Portland Intl., returning Mon, Aug 18, priced at $382 found 1 day ago

Thu, Aug 7 - Mon, Aug 18

STL

Lambert-St. Louis Intl.

PDX

Portland Intl.

$382 Roundtrip, found 1 day ago

$382

Roundtrip

found 1 day ago

Select American Airlines flight, departing Thu, Aug 7 from Lambert-St. Louis Intl. to Portland Intl., returning Mon, Aug 18, priced at $382 found 1 day ago

Thu, Aug 7 - Mon, Aug 18

STL

Lambert-St. Louis Intl.

PDX

Portland Intl.

$384 Roundtrip, found 1 day ago

$384

Roundtrip

found 1 day ago

Select American Airlines flight, departing Thu, Aug 7 from Lambert-St. Louis Intl. to Portland Intl., returning Mon, Aug 18, priced at $384 found 1 day ago

Thu, Aug 7 - Mon, Aug 18

STL

Lambert-St. Louis Intl.

PDX

Portland Intl.

$396 Roundtrip, found 1 day ago

$396

Roundtrip

found 1 day ago

Select United flight, departing Thu, Aug 7 from Lambert-St. Louis Intl. to Portland Intl., returning Mon, Aug 18, priced at $396 found 1 day ago

Thu, Aug 7 - Mon, Aug 18

STL

Lambert-St. Louis Intl.

PDX

Portland Intl.

$404 Roundtrip, found 1 day ago

$404

Roundtrip

found 1 day ago

Select American Airlines flight, departing Thu, Aug 7 from Lambert-St. Louis Intl. to Portland Intl., returning Mon, Aug 18, priced at $404 found 1 day ago

Thu, Aug 7 - Mon, Aug 18

STL

Lambert-St. Louis Intl.

PDX

Portland Intl.

$411 Roundtrip, found 1 day ago

$411

Roundtrip

found 1 day ago

Select United flight, departing Thu, Aug 7 from Lambert-St. Louis Intl. to Portland Intl., returning Mon, Aug 18, priced at $411 found 1 day ago

Thu, Aug 7 - Mon, Aug 18

STL

Lambert-St. Louis Intl.

PDX

Portland Intl.

$414 Roundtrip, found 1 day ago

$414

Roundtrip

found 1 day ago

Select American Airlines flight, departing Thu, Aug 7 from Lambert-St. Louis Intl. to Portland Intl., returning Mon, Aug 18, priced at $414 found 1 day ago

Thu, Aug 7 - Mon, Aug 18

STL

Lambert-St. Louis Intl.

PDX

Portland Intl.

$422 Roundtrip, found 1 day ago

$422

Roundtrip

found 1 day ago

Select United flight, departing Thu, Aug 7 from Lambert-St. Louis Intl. to Portland Intl., returning Mon, Aug 18, priced at $422 found 1 day ago

Thu, Aug 7 - Mon, Aug 18

STL

Lambert-St. Louis Intl.

PDX

Portland Intl.

$429 Roundtrip, found 1 day ago

$429

Roundtrip

found 1 day ago

Select American Airlines flight, departing Thu, Aug 7 from Lambert-St. Louis Intl. to Portland Intl., returning Mon, Aug 18, priced at $429 found 1 day ago

Thu, Aug 7 - Mon, Aug 18

STL

Lambert-St. Louis Intl.

PDX

Portland Intl.

$432 Roundtrip, found 1 day ago

$432

Roundtrip

found 1 day ago

Select Alaska Airlines flight, departing Thu, Aug 7 from Lambert-St. Louis Intl. to Portland Intl., returning Mon, Aug 18, priced at $432 found 1 day ago

Thu, Aug 7 - Mon, Aug 18

STL

Lambert-St. Louis Intl.

PDX

Portland Intl.

$433 Roundtrip, found 1 day ago

$433

Roundtrip

found 1 day ago

Select Alaska Airlines flight, departing Thu, Aug 7 from Lambert-St. Louis Intl. to Portland Intl., returning Mon, Aug 18, priced at $433 found 1 day ago

Thu, Aug 7 - Mon, Aug 18

STL

Lambert-St. Louis Intl.

PDX

Portland Intl.

$436 Roundtrip, found 1 day ago

$436

Roundtrip

found 1 day ago

Select United flight, departing Thu, Aug 7 from Lambert-St. Louis Intl. to Portland Intl., returning Mon, Aug 18, priced at $436 found 1 day ago