Southwest® flights from Ontario/LA to Pittsburgh from $178

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Low fares from Ontario/LA to Pittsburgh

$

Ontario/LA (ONT)to

Pittsburgh (PIT)
Depart: 10/07/2026

One-way

Basic

From
$178
Seen: 17 hrs ago

Ontario/LA (ONT)to

Pittsburgh (PIT)
Depart: 10/20/2026

One-way

Basic

From
$178
Seen: 9 hrs ago

Ontario/LA (ONT)to

Pittsburgh (PIT)
Depart: 10/21/2026

One-way

Basic

From
$178
Seen: 9 hrs ago

Ontario/LA (ONT)to

Pittsburgh (PIT)
Depart: 10/12/2026

One-way

Basic

From
$178
Seen: 11 hrs ago

Ontario/LA (ONT)to

Pittsburgh (PIT)
Depart: 11/04/2026

One-way

Basic

From
$178
Seen: 11 hrs ago

Ontario/LA (ONT)to

Pittsburgh (PIT)
Depart: 10/14/2026

One-way

Basic

From
$178
Seen: 12 hrs ago

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Explore flights from Ontario/LA to Pittsburgh

Jul 2026
From$574*
Seen: 10 hrs ago
One Way/Basic
Aug 2026
From$196*
Seen: 29 minutes ago
One Way/Basic
Sep 2026
From$183*
Seen: 34 minutes ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $196
cmp-daily-histogram-bars-legend-max-price-aria-label $574
Displaying fares for July-2026
  • ONT–PIT, 07/31/2026: From $574
    31

    Fri

    JUL

  • ONT–PIT: cmp-view-offers-disclaimer. Find Offers
    01

    Sat

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    02

    Sun

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    03

    Mon

  • ONT–PIT, 08/04/2026: From $574
    04

    Tue

  • ONT–PIT, 08/05/2026: From $574
    05

    Wed

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    06

    Thu

  • ONT–PIT, 08/07/2026: From $504
    07

    Fri

  • ONT–PIT, 08/08/2026: From $504
    08

    Sat

  • ONT–PIT, 08/09/2026: From $504
    09

    Sun

  • ONT–PIT, 08/10/2026: From $504
    10

    Mon

  • ONT–PIT, 08/11/2026: From $504
    11

    Tue

  • ONT–PIT, 08/12/2026: From $504
    12

    Wed

  • ONT–PIT, 08/13/2026: From $315
    13

    Thu

  • ONT–PIT, 08/14/2026: From $309
    14

    Fri

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

    Sat

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

    Sun

  • ONT–PIT, 08/17/2026: From $304
    17

    Mon

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    18

    Tue

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

    Wed

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    20

    Thu

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    21

    Fri

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    22

    Sat

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    23

    Sun

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    24

    Mon

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    25

    Tue

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

    Wed

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

    Thu

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

    Fri

  • ONT–PIT, 08/29/2026: From $196
    29

    Sat

  • ONT–PIT: cmp-view-offers-disclaimer. Find Offers
    30

    Sun

    • Range$196-$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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