Southwest® flights from Ontario/LA to Pittsburgh from $189

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Low fares from Ontario/LA to Pittsburgh

$

Ontario/LA (ONT)to

Pittsburgh (PIT)
Depart: 10/21/2026

One-way

Basic

From
$189
Seen: 19 hrs ago

Ontario/LA (ONT)to

Pittsburgh (PIT)
Depart: 10/20/2026

One-way

Basic

From
$189
Seen: 8 hrs ago

Ontario/LA (ONT)to

Pittsburgh (PIT)
Depart: 10/22/2026

One-way

Basic

From
$189
Seen: 6 hrs ago

Ontario/LA (ONT)to

Pittsburgh (PIT)
Depart: 10/05/2026

One-way

Basic

From
$189
Seen: 18 hrs ago

Ontario/LA (ONT)to

Pittsburgh (PIT)
Depart: 10/06/2026

One-way

Basic

From
$189
Seen: 20 minutes ago

Ontario/LA (ONT)to

Pittsburgh (PIT)
Depart: 10/23/2026

One-way

Basic

From
$206
Seen: 8 hrs ago

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Explore flights from Ontario/LA to Pittsburgh

Sep 2026
From$206*
Seen: 21 hrs ago
One Way/Basic
Oct 2026
From$189*
Seen: 18 hrs ago
One Way/Basic
Nov 2026
From$225*
Seen: 5 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $189
cmp-daily-histogram-bars-legend-max-price-aria-label $574
Displaying fares for September-2026
  • ONT–PIT, 09/11/2026: From $574
    11

    Fri

    SEP

  • ONT–PIT, 09/12/2026: From $574
    12

    Sat

  • ONT–PIT, 09/13/2026: From $574
    13

    Sun

  • ONT–PIT, 09/14/2026: From $574
    14

    Mon

  • ONT–PIT: cmp-view-offers-disclaimer. Find Offers
    15

    Tue

  • ONT–PIT, 09/16/2026: From $504
    16

    Wed

  • ONT–PIT, 09/17/2026: From $504
    17

    Thu

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

    Fri

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

    Sat

  • ONT–PIT: cmp-view-offers-disclaimer. Find Offers
    20

    Sun

  • ONT–PIT: cmp-view-offers-disclaimer. Find Offers
    21

    Mon

  • ONT–PIT, 09/22/2026: From $504
    22

    Tue

  • ONT–PIT, 09/23/2026: From $304
    23

    Wed

  • ONT–PIT, 09/24/2026: From $420
    24

    Thu

  • ONT–PIT, 09/25/2026: From $309
    25

    Fri

  • ONT–PIT, 09/26/2026: From $304
    26

    Sat

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

    Sun

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

    Mon

  • ONT–PIT, 09/29/2026: From $304
    29

    Tue

  • ONT–PIT, 09/30/2026: From $206
    30

    Wed

  • ONT–PIT, 10/01/2026: From $225
    01

    Thu

    OCT

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

    Fri

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

    Sat

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

    Sun

  • ONT–PIT, 10/05/2026: From $189
    05

    Mon

  • ONT–PIT, 10/06/2026: From $189
    06

    Tue

  • ONT–PIT, 10/07/2026: From $239
    07

    Wed

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

    Thu

  • ONT–PIT: cmp-view-offers-disclaimer. Find Offers
    09

    Fri

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

    Sat

    • Range$189-$574

    *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:
    Pittsburgh International Airport
    Distance:
    2090 miles

    Route Information

    118† 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 118 weekly flights from Ontario/LA to Pittsburgh on Southwest Airlines.
    To find the lowest fares by day and time to fly Ontario/LA to Pittsburgh with Southwest, check out our Low Fare Calendar.
    You can rent a car at Pittsburgh International Airport book yours with your flight.
    Yes! Flights from Ontario/LA to Pittsburgh—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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