Southwest® flights from St. Louis to Portland, OR from $103

Promo Code

Low fares from St. Louis to Portland, OR

$

St. Louis (STL)to

Portland, OR (PDX)
Depart: 12/02/2026

One-way

Basic

From
$103
Seen: 48 minutes ago

St. Louis (STL)to

Portland, OR (PDX)
Depart: 01/06/2027

One-way

Basic

From
$103
Seen: 3 hrs ago

St. Louis (STL)to

Portland, OR (PDX)
Depart: 11/12/2026

One-way

Basic

From
$116
Seen: 31 minutes ago

St. Louis (STL)to

Portland, OR (PDX)
Depart: 01/06/2027

One-way

Choice

From
$153
Seen: 3 hrs ago

St. Louis (STL)to

Portland, OR (PDX)
Depart: 12/02/2026

One-way

Choice

From
$153
Seen: 48 minutes ago

St. Louis (STL)to

Portland, OR (PDX)
Depart: 11/12/2026

One-way

Choice

From
$166
Seen: 31 minutes ago

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Explore flights from St. Louis to Portland, OR

Oct 2026
From$190*
Seen: 20 hrs ago
One Way/Basic
Nov 2026
From$116*
Seen: 31 minutes ago
One Way/Basic
Dec 2026
From$103*
Seen: 48 minutes ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $190
cmp-daily-histogram-bars-legend-max-price-aria-label $340
Displaying fares for October-2026
  • STL–PDX: cmp-view-offers-disclaimer. Find Offers
    02

    Fri

    OCT

  • STL–PDX, 10/03/2026: From $335
    03

    Sat

  • STL–PDX, 10/04/2026: From $340
    04

    Sun

  • STL–PDX, 10/05/2026: From $340
    05

    Mon

  • STL–PDX, 10/06/2026: From $340
    06

    Tue

  • STL–PDX, 10/07/2026: From $335
    07

    Wed

  • STL–PDX, 10/08/2026: From $335
    08

    Thu

  • STL–PDX, 10/09/2026: From $327
    09

    Fri

  • STL–PDX, 10/10/2026: From $322
    10

    Sat

  • STL–PDX, 10/11/2026: From $327
    11

    Sun

  • STL–PDX, 10/12/2026: From $322
    12

    Mon

  • STL–PDX, 10/13/2026: From $327
    13

    Tue

  • STL–PDX, 10/14/2026: From $327
    14

    Wed

  • STL–PDX, 10/15/2026: From $280
    15

    Thu

  • STL–PDX: cmp-view-offers-disclaimer. Find Offers
    16

    Fri

  • STL–PDX: cmp-view-offers-disclaimer. Find Offers
    17

    Sat

  • STL–PDX: cmp-view-offers-disclaimer. Find Offers
    18

    Sun

  • STL–PDX: cmp-view-offers-disclaimer. Find Offers
    19

    Mon

  • STL–PDX, 10/20/2026: From $224
    20

    Tue

  • STL–PDX, 10/21/2026: From $224
    21

    Wed

  • STL–PDX, 10/22/2026: From $195
    22

    Thu

  • STL–PDX, 10/23/2026: From $195
    23

    Fri

  • STL–PDX: cmp-view-offers-disclaimer. Find Offers
    24

    Sat

  • STL–PDX, 10/25/2026: From $224
    25

    Sun

  • STL–PDX: cmp-view-offers-disclaimer. Find Offers
    26

    Mon

  • STL–PDX, 10/27/2026: From $195
    27

    Tue

  • STL–PDX, 10/28/2026: From $195
    28

    Wed

  • STL–PDX: cmp-view-offers-disclaimer. Find Offers
    29

    Thu

  • STL–PDX, 10/30/2026: From $190
    30

    Fri

  • STL–PDX, 10/31/2026: From $195
    31

    Sat

  • STL–PDX: cmp-view-offers-disclaimer. Find Offers
    01

    Sun

    NOV

    • Range$190-$340

    *Fares displayed have been collected within the last 24 hours and may no longer be available at time of booking. Additional fees and charges for optional products and services may apply. Modifying this information may result in a different fare. To find the most updated fare, please visit Southwest.com. Fares listed are Basic, which are subject to additional terms and conditions.

    Flight Details

    Departing from:
    Lambert-St Louis Int'l Airport
    Arriving at:
    Portland International Airport
    Distance:
    1708 miles

    Route Information

    154† Weekly flights

    † Weekly flights based on DOT published scheduled average flights Monday through Sunday between 9/1/2025 and 9/30/2025. Note: route may not operate every day of the week.

    ‡ Nonstop flights based on DOT published scheduled average flights Monday through Sunday between 9/1/2025 and 9/30/2025.

    Questions we hear the most

    There are 154 weekly flights from St. Louis to Portland, OR on Southwest Airlines.
    To find the lowest fares by day and time to fly St. Louis to Portland, OR with Southwest, check out our Low Fare Calendar.
    You can rent a car at Portland International Airport book yours with your flight.
    Yes! Flights from St. Louis to Portland, OR—or from here or there to anywhere—can be changed with no change fees. Fare difference may apply.
    Check the status of your upcoming Southwest flight.
    Check out the Southwest Airlines® Help Center for answers about everything Southwest.

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