Southwest® flights from Ontario/LA to Portland, OR from $94

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Low fares from Ontario/LA to Portland, OR

$

Ontario/LA (ONT)to

Portland, OR (PDX)
Depart: 12/06/2026

One-way

Basic

From
$94
Seen: 21 hrs ago

Ontario/LA (ONT)to

Portland, OR (PDX)
Depart: 12/09/2026

One-way

Basic

From
$94
Seen: 6 hrs ago

Ontario/LA (ONT)to

Portland, OR (PDX)
Depart: 12/10/2026

One-way

Basic

From
$94
Seen: 6 hrs ago

Ontario/LA (ONT)to

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

One-way

Basic

From
$94
Seen: 1 hour ago

Ontario/LA (ONT)to

Portland, OR (PDX)
Depart: 12/14/2026

One-way

Basic

From
$94
Seen: 5 hrs ago

Ontario/LA (ONT)to

Portland, OR (PDX)
Depart: 12/07/2026

One-way

Basic

From
$94
Seen: 7 hrs ago

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Explore flights from Ontario/LA to Portland, OR

Nov 2026
From$203*
Seen: 22 hrs ago
One Way/Basic
Dec 2026
From$94*
Seen: 5 hrs ago
One Way/Basic
Jan 2027
From$101*
Seen: 18 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $94
cmp-daily-histogram-bars-legend-max-price-aria-label $361
Displaying fares for November-2026
  • ONT–PDX, 11/10/2026: From $361
    10

    Tue

    NOV

  • ONT–PDX, 11/11/2026: From $361
    11

    Wed

  • ONT–PDX, 11/12/2026: From $361
    12

    Thu

  • ONT–PDX: cmp-view-offers-disclaimer. Find Offers
    13

    Fri

  • ONT–PDX, 11/14/2026: From $361
    14

    Sat

  • ONT–PDX, 11/15/2026: From $361
    15

    Sun

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

    Mon

  • ONT–PDX, 11/17/2026: From $349
    17

    Tue

  • ONT–PDX, 11/18/2026: From $349
    18

    Wed

  • ONT–PDX, 11/19/2026: From $349
    19

    Thu

  • ONT–PDX, 11/20/2026: From $349
    20

    Fri

  • ONT–PDX, 11/21/2026: From $349
    21

    Sat

  • ONT–PDX, 11/22/2026: From $349
    22

    Sun

  • ONT–PDX, 11/23/2026: From $228
    23

    Mon

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

    Tue

  • ONT–PDX, 11/25/2026: From $228
    25

    Wed

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

    Thu

  • ONT–PDX, 11/27/2026: From $269
    27

    Fri

  • ONT–PDX, 11/28/2026: From $354
    28

    Sat

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

    Sun

  • ONT–PDX, 11/30/2026: From $203
    30

    Mon

  • ONT–PDX, 12/01/2026: From $101
    01

    Tue

    DEC

  • ONT–PDX: cmp-view-offers-disclaimer. Find Offers
    02

    Wed

  • ONT–PDX, 12/03/2026: From $94
    03

    Thu

  • ONT–PDX: cmp-view-offers-disclaimer. Find Offers
    04

    Fri

  • ONT–PDX, 12/05/2026: From $94
    05

    Sat

  • ONT–PDX, 12/06/2026: From $94
    06

    Sun

  • ONT–PDX, 12/07/2026: From $94
    07

    Mon

  • ONT–PDX: cmp-view-offers-disclaimer. Find Offers
    08

    Tue

  • ONT–PDX, 12/09/2026: From $94
    09

    Wed

    • Range$94-$361

    *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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