Southwest® flights from Portland, OR to Ontario/LA from $104

Promo Code

Low fares from Portland, OR to Ontario/LA

$

Portland, OR (PDX)to

Ontario/LA (ONT)
Depart: 01/26/2027

One-way

Basic

From
$104
Seen: 13 hrs ago

Portland, OR (PDX)to

Ontario/LA (ONT)
Depart: 01/25/2027

One-way

Basic

From
$104
Seen: 21 hrs ago

Portland, OR (PDX)to

Ontario/LA (ONT)
Depart: 01/27/2027

One-way

Basic

From
$104
Seen: 16 hrs ago

Portland, OR (PDX)to

Ontario/LA (ONT)
Depart: 01/07/2027

One-way

Basic

From
$104
Seen: 15 hrs ago

Portland, OR (PDX)to

Ontario/LA (ONT)
Depart: 11/12/2026

One-way

Basic

From
$109
Seen: 10 hrs ago

Portland, OR (PDX)to

Ontario/LA (ONT)
Depart: 11/11/2026

One-way

Basic

From
$109
Seen: 8 hrs ago

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Explore flights from Portland, OR to Ontario/LA

Oct 2026
From$244*
Seen: 20 hrs ago
One Way/Basic
Nov 2026
From$109*
Seen: 12 hrs ago
One Way/Basic
Dec 2026
From$109*
Seen: 18 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
  • PDX–ONT, 10/24/2026: From $244
    24

    Sat

    OCT

  • PDX–ONT, 10/25/2026: From $244
    25

    Sun

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

    Mon

  • PDX–ONT: cmp-view-offers-disclaimer. Find Offers
    27

    Tue

  • PDX–ONT: cmp-view-offers-disclaimer. Find Offers
    28

    Wed

  • PDX–ONT, 10/29/2026: From $244
    29

    Thu

  • PDX–ONT, 10/30/2026: From $244
    30

    Fri

  • PDX–ONT, 10/31/2026: From $244
    31

    Sat

  • PDX–ONT, 11/01/2026: From $244
    01

    Sun

    NOV

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

    Mon

  • PDX–ONT: cmp-view-offers-disclaimer. Find Offers
    03

    Tue

  • PDX–ONT, 11/04/2026: From $199
    04

    Wed

  • PDX–ONT: cmp-view-offers-disclaimer. Find Offers
    05

    Thu

  • PDX–ONT, 11/06/2026: From $149
    06

    Fri

  • PDX–ONT: cmp-view-offers-disclaimer. Find Offers
    07

    Sat

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

    Sun

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

    Mon

  • PDX–ONT, 11/10/2026: From $109
    10

    Tue

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

    Wed

  • PDX–ONT, 11/12/2026: From $109
    12

    Thu

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

    Fri

  • PDX–ONT: cmp-view-offers-disclaimer. Find Offers
    14

    Sat

  • PDX–ONT, 11/15/2026: From $132
    15

    Sun

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

    Mon

  • PDX–ONT, 11/17/2026: From $109
    17

    Tue

  • PDX–ONT, 11/18/2026: From $109
    18

    Wed

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

    Thu

  • PDX–ONT, 11/20/2026: From $170
    20

    Fri

  • PDX–ONT, 11/21/2026: From $114
    21

    Sat

  • PDX–ONT: cmp-view-offers-disclaimer. Find Offers
    22

    Sun

  • PDX–ONT: cmp-view-offers-disclaimer. Find Offers
    23

    Mon

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

    Questions we hear the most

    There are 147 weekly flights from Portland, OR to Ontario/LA on Southwest Airlines.
    To find the lowest fares by day and time to fly Portland, OR to Ontario/LA with Southwest, check out our Low Fare Calendar.
    You can rent a car at LA/Ontario International Airport book yours with your flight.
    Yes! Flights from Portland, OR to Ontario/LA—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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