Southwest® flights from Ontario/LA to Philadelphia from $127

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Low fares from Ontario/LA to Philadelphia

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Ontario/LA (ONT)to

Philadelphia (PHL)
Depart: 01/25/2027

One-way

Basic

From
$127
Seen: 18 hrs ago

Ontario/LA (ONT)to

Philadelphia (PHL)
Depart: 12/05/2026

One-way

Basic

From
$127
Seen: 1 hour ago

Ontario/LA (ONT)to

Philadelphia (PHL)
Depart: 12/15/2026

One-way

Basic

From
$127
Seen: 19 minutes ago

Ontario/LA (ONT)to

Philadelphia (PHL)
Depart: 12/07/2026

One-way

Basic

From
$127
Seen: 8 hrs ago

Ontario/LA (ONT)to

Philadelphia (PHL)
Depart: 12/12/2026

One-way

Basic

From
$127
Seen: 7 hrs ago

Ontario/LA (ONT)to

Philadelphia (PHL)
Depart: 12/08/2026

One-way

Basic

From
$127
Seen: 22 hrs ago

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Explore flights from Ontario/LA to Philadelphia

Oct 2026
From$295*
Seen: 49 minutes ago
One Way/Basic
Nov 2026
From$160*
Seen: 20 hrs ago
One Way/Basic
Dec 2026
From$127*
Seen: 1 hour ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $160
cmp-daily-histogram-bars-legend-max-price-aria-label $383
Displaying fares for October-2026
  • ONT–PHL: cmp-view-offers-disclaimer. Find Offers
    20

    Tue

    OCT

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

    Wed

  • ONT–PHL, 10/22/2026: From $383
    22

    Thu

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    23

    Fri

  • ONT–PHL, 10/24/2026: From $295
    24

    Sat

  • ONT–PHL, 10/25/2026: From $383
    25

    Sun

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    26

    Mon

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

    Tue

  • ONT–PHL, 10/28/2026: From $295
    28

    Wed

  • ONT–PHL, 10/29/2026: From $383
    29

    Thu

  • ONT–PHL, 10/30/2026: From $383
    30

    Fri

  • ONT–PHL: cmp-view-offers-disclaimer. Find Offers
    31

    Sat

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

    Sun

    NOV

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

    Mon

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

    Tue

  • ONT–PHL, 11/04/2026: From $295
    04

    Wed

  • ONT–PHL, 11/05/2026: From $324
    05

    Thu

  • ONT–PHL, 11/06/2026: From $324
    06

    Fri

  • ONT–PHL, 11/07/2026: From $295
    07

    Sat

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

    Sun

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

    Mon

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

    Tue

  • ONT–PHL: cmp-view-offers-disclaimer. Find Offers
    11

    Wed

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

    Thu

  • ONT–PHL, 11/13/2026: From $160
    13

    Fri

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

    Sat

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

    Sun

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

    Mon

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

    Tue

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

    Wed

  • ONT–PHL, 11/19/2026: From $344
    19

    Thu

    • Range$160-$383

    *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:
    Philadelphia International Airport
    Distance:
    2356 miles

    Questions we hear the most

    There are 78 weekly flights from Ontario/LA to Philadelphia on Southwest Airlines.
    To find the lowest fares by day and time to fly Ontario/LA to Philadelphia with Southwest, check out our Low Fare Calendar.
    You can rent a car at Philadelphia International Airport book yours with your flight.
    Yes! Flights from Ontario/LA to Philadelphia—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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