Flights from Portland to St. Louis

Cheapest flights from Portland

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.

Sat, May 31 - Fri, Jun 13

PWM

Portland Intl. Jetport

STL

Lambert-St. Louis Intl.

$431 Roundtrip, found 3 days ago

$431

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Sat, May 31 from Portland Intl. Jetport to Lambert-St. Louis Intl., returning Fri, Jun 13, priced at $431 found 3 days ago

Tue, Jun 3 - Sun, Jun 15

PWM

Portland Intl. Jetport

STL

Lambert-St. Louis Intl.

$469 Roundtrip, found 3 days ago

$469

Roundtrip

found 3 days ago

Select Delta flight, departing Tue, Jun 3 from Portland Intl. Jetport to Lambert-St. Louis Intl., returning Sun, Jun 15, priced at $469 found 3 days ago

Tue, Jun 3 - Sat, Jun 14

PWM

Portland Intl. Jetport

STL

Lambert-St. Louis Intl.

$489 Roundtrip, found 3 days ago

$489

Roundtrip

found 3 days ago

Select Delta flight, departing Tue, Jun 3 from Portland Intl. Jetport to Lambert-St. Louis Intl., returning Sat, Jun 14, priced at $489 found 3 days ago

Thu, Jun 5 - Sun, Jun 15

PWM

Portland Intl. Jetport

STL

Lambert-St. Louis Intl.

$507 Roundtrip, found 3 days ago

$507

Roundtrip

found 3 days ago

Select Delta flight, departing Thu, Jun 5 from Portland Intl. Jetport to Lambert-St. Louis Intl., returning Sun, Jun 15, priced at $507 found 3 days ago

Thu, Jun 5 - Sat, Jun 14

PWM

Portland Intl. Jetport

STL

Lambert-St. Louis Intl.

$527 Roundtrip, found 3 days ago

$527

Roundtrip

found 3 days ago

Select Delta flight, departing Thu, Jun 5 from Portland Intl. Jetport to Lambert-St. Louis Intl., returning Sat, Jun 14, priced at $527 found 3 days ago

Fri, May 30 - Sun, Jun 15

PWM

Portland Intl. Jetport

STL

Lambert-St. Louis Intl.

$532 Roundtrip, found 3 days ago

$532

Roundtrip

found 3 days ago

Select Delta flight, departing Fri, May 30 from Portland Intl. Jetport to Lambert-St. Louis Intl., returning Sun, Jun 15, priced at $532 found 3 days ago

Fri, May 30 - Sat, Jun 14

PWM

Portland Intl. Jetport

STL

Lambert-St. Louis Intl.

$552 Roundtrip, found 3 days ago

$552

Roundtrip

found 3 days ago

Select Delta flight, departing Fri, May 30 from Portland Intl. Jetport to Lambert-St. Louis Intl., returning Sat, Jun 14, priced at $552 found 3 days ago

Mon, Jun 2 - Mon, Jun 16

PWM

Portland Intl. Jetport

STL

Lambert-St. Louis Intl.

$577 Roundtrip, found 3 days ago

$577

Roundtrip

found 3 days ago

Select American Airlines flight, departing Mon, Jun 2 from Portland Intl. Jetport to Lambert-St. Louis Intl., returning Mon, Jun 16, priced at $577 found 3 days ago

Mon, Jun 2 - Mon, Jun 16

PWM

Portland Intl. Jetport

STL

Lambert-St. Louis Intl.

$582 Roundtrip, found 3 days ago

$582

Roundtrip

found 3 days ago

Select United flight, departing Mon, Jun 2 from Portland Intl. Jetport to Lambert-St. Louis Intl., returning Mon, Jun 16, priced at $582 found 3 days ago

Mon, Jun 2 - Wed, Jun 18

PWM

Portland Intl. Jetport

STL

Lambert-St. Louis Intl.

$612 Roundtrip, found 3 days ago

$612

Roundtrip

found 3 days ago

Select United flight, departing Mon, Jun 2 from Portland Intl. Jetport to Lambert-St. Louis Intl., returning Wed, Jun 18, priced at $612 found 3 days ago

Mon, Jun 2 - Mon, Jun 16

PWM

Portland Intl. Jetport

STL

Lambert-St. Louis Intl.

$617 Roundtrip, found 3 days ago

$617

Roundtrip

found 3 days ago

Select American Airlines flight, departing Mon, Jun 2 from Portland Intl. Jetport to Lambert-St. Louis Intl., returning Mon, Jun 16, priced at $617 found 3 days ago

Mon, Jun 2 - Mon, Jun 16

PWM

Portland Intl. Jetport

STL

Lambert-St. Louis Intl.

$622 Roundtrip, found 3 days ago

$622

Roundtrip

found 3 days ago

Select Delta flight, departing Mon, Jun 2 from Portland Intl. Jetport to Lambert-St. Louis Intl., returning Mon, Jun 16, priced at $622 found 3 days ago

Mon, Jun 2 - Mon, Jun 16

PWM

Portland Intl. Jetport

STL

Lambert-St. Louis Intl.

$624 Roundtrip, found 3 days ago

$624

Roundtrip

found 3 days ago

Select United flight, departing Mon, Jun 2 from Portland Intl. Jetport to Lambert-St. Louis Intl., returning Mon, Jun 16, priced at $624 found 3 days ago

Mon, Jun 2 - Mon, Jun 16

PWM

Portland Intl. Jetport

STL

Lambert-St. Louis Intl.

$627 Roundtrip, found 3 days ago

$627

Roundtrip

found 3 days ago

Select American Airlines flight, departing Mon, Jun 2 from Portland Intl. Jetport to Lambert-St. Louis Intl., returning Mon, Jun 16, priced at $627 found 3 days ago

Mon, Jun 2 - Mon, Jun 16

PWM

Portland Intl. Jetport

STL

Lambert-St. Louis Intl.

$629 Roundtrip, found 3 days ago

$629

Roundtrip

found 3 days ago

Select American Airlines flight, departing Mon, Jun 2 from Portland Intl. Jetport to Lambert-St. Louis Intl., returning Mon, Jun 16, priced at $629 found 3 days ago

Mon, Jun 2 - Fri, Jun 13

PWM

Portland Intl. Jetport

STL

Lambert-St. Louis Intl.

$632 Roundtrip, found 3 days ago

$632

Roundtrip

found 3 days ago

Select United flight, departing Mon, Jun 2 from Portland Intl. Jetport to Lambert-St. Louis Intl., returning Fri, Jun 13, priced at $632 found 3 days ago

Mon, Jun 2 - Mon, Jun 16

PWM

Portland Intl. Jetport

STL

Lambert-St. Louis Intl.

$637 Roundtrip, found 3 days ago

$637

Roundtrip

found 3 days ago

Select Delta flight, departing Mon, Jun 2 from Portland Intl. Jetport to Lambert-St. Louis Intl., returning Mon, Jun 16, priced at $637 found 3 days ago

Mon, Jun 2 - Mon, Jun 16

PWM

Portland Intl. Jetport

STL

Lambert-St. Louis Intl.

$642 Roundtrip, found 3 days ago

$642

Roundtrip

found 3 days ago

Select United flight, departing Mon, Jun 2 from Portland Intl. Jetport to Lambert-St. Louis Intl., returning Mon, Jun 16, priced at $642 found 3 days ago

Mon, Jun 2 - Mon, Jun 16

PWM

Portland Intl. Jetport

STL

Lambert-St. Louis Intl.

$647 Roundtrip, found 3 days ago

$647

Roundtrip

found 3 days ago

Select American Airlines flight, departing Mon, Jun 2 from Portland Intl. Jetport to Lambert-St. Louis Intl., returning Mon, Jun 16, priced at $647 found 3 days ago

Mon, Jun 2 - Mon, Jun 16

PWM

Portland Intl. Jetport

STL

Lambert-St. Louis Intl.

$662 Roundtrip, found 3 days ago

$662

Roundtrip

found 3 days ago

Select Delta flight, departing Mon, Jun 2 from Portland Intl. Jetport to Lambert-St. Louis Intl., returning Mon, Jun 16, priced at $662 found 3 days ago