Southwest® flights from Ontario/LA to Portland, OR from $109

Promo Code

Low fares from Ontario/LA to Portland, OR

$

Ontario/LA (ONT)to

Portland, OR (PDX)
Depart: 01/23/2027

One-way

Basic

From
$104
Seen: 1 hour ago

Ontario/LA (ONT)to

Portland, OR (PDX)
Depart: 11/09/2026

One-way

Basic

From
$109
Seen: 20 hrs ago

Ontario/LA (ONT)to

Portland, OR (PDX)
Depart: 12/17/2026

One-way

Basic

From
$109
Seen: 8 hrs ago

Ontario/LA (ONT)to

Portland, OR (PDX)
Depart: 01/13/2027

One-way

Basic

From
$109
Seen: 7 hrs ago

Ontario/LA (ONT)to

Portland, OR (PDX)
Depart: 12/05/2026

One-way

Basic

From
$109
Seen: 6 hrs ago

Ontario/LA (ONT)to

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

One-way

Basic

From
$109
Seen: 15 hrs ago

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Explore flights from Ontario/LA to Portland, OR

Oct 2026
From$199*
Seen: 12 hrs ago
One Way/Basic
Nov 2026
From$109*
Seen: 15 hrs ago
One Way/Basic
Dec 2026
From$109*
Seen: 5 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $109
cmp-daily-histogram-bars-legend-max-price-aria-label $244
Displaying fares for October-2026
  • ONT–PDX, 10/20/2026: From $244
    20

    Tue

    OCT

  • ONT–PDX, 10/21/2026: From $244
    21

    Wed

  • ONT–PDX, 10/22/2026: From $244
    22

    Thu

  • ONT–PDX, 10/23/2026: From $244
    23

    Fri

  • ONT–PDX, 10/24/2026: From $244
    24

    Sat

  • ONT–PDX: cmp-view-offers-disclaimer. Find Offers
    25

    Sun

  • ONT–PDX, 10/26/2026: From $244
    26

    Mon

  • ONT–PDX, 10/27/2026: From $239
    27

    Tue

  • ONT–PDX, 10/28/2026: From $239
    28

    Wed

  • ONT–PDX, 10/29/2026: From $209
    29

    Thu

  • ONT–PDX, 10/30/2026: From $209
    30

    Fri

  • ONT–PDX, 10/31/2026: From $199
    31

    Sat

  • ONT–PDX, 11/01/2026: From $199
    01

    Sun

    NOV

  • ONT–PDX, 11/02/2026: From $199
    02

    Mon

  • ONT–PDX, 11/03/2026: From $149
    03

    Tue

  • ONT–PDX, 11/04/2026: From $159
    04

    Wed

  • ONT–PDX, 11/05/2026: From $149
    05

    Thu

  • ONT–PDX, 11/06/2026: From $159
    06

    Fri

  • ONT–PDX, 11/07/2026: From $159
    07

    Sat

  • ONT–PDX, 11/08/2026: From $199
    08

    Sun

  • ONT–PDX, 11/09/2026: From $109
    09

    Mon

  • ONT–PDX: cmp-view-offers-disclaimer. Find Offers
    10

    Tue

  • ONT–PDX, 11/11/2026: From $109
    11

    Wed

  • ONT–PDX: cmp-view-offers-disclaimer. Find Offers
    12

    Thu

  • ONT–PDX, 11/13/2026: From $124
    13

    Fri

  • ONT–PDX, 11/14/2026: From $132
    14

    Sat

  • ONT–PDX, 11/15/2026: From $199
    15

    Sun

  • ONT–PDX, 11/16/2026: From $159
    16

    Mon

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

    Tue

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

    Wed

  • ONT–PDX, 11/19/2026: From $159
    19

    Thu

    • Range$109-$244

    *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:
    LA/Ontario International Airport
    Arriving at:
    Portland International Airport
    Distance:
    838 miles

    Questions we hear the most

    There are 153 weekly flights from Ontario/LA to Portland, OR on Southwest Airlines.
    To find the lowest fares by day and time to fly Ontario/LA 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 Ontario/LA 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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