Southwest® flights from Ontario/LA to Chicago (O'Hare)

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Low fares from Ontario/LA to Chicago (O'Hare)

$

Ontario/LA (ONT)to

Chicago (Midway) (MDW)
Depart: 09/28/2026

One-way

Basic

From
$120
Seen: 22 hrs ago

Ontario/LA (ONT)to

Chicago (Midway) (MDW)
Depart: 10/03/2026

One-way

Basic

From
$120
Seen: 20 hrs ago

Ontario/LA (ONT)to

Chicago (Midway) (MDW)
Depart: 10/17/2026

One-way

Basic

From
$120
Seen: 20 hrs ago

Ontario/LA (ONT)to

Chicago (Midway) (MDW)
Depart: 10/27/2026

One-way

Basic

From
$120
Seen: 9 hrs ago

Ontario/LA (ONT)to

Chicago (Midway) (MDW)
Depart: 11/11/2026

One-way

Basic

From
$120
Seen: 5 hrs ago

Ontario/LA (ONT)to

Chicago (Midway) (MDW)
Depart: 11/04/2026

One-way

Basic

From
$120
Seen: 22 hrs ago

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Explore flights from Ontario/LA to Chicago (O'Hare)

Aug 2026
From$139*
Seen: 19 hrs ago
One Way/Basic
Sep 2026
From$120*
Seen: 13 hrs ago
One Way/Basic
Oct 2026
From$120*
Seen: 5 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $120
cmp-daily-histogram-bars-legend-max-price-aria-label $279
Displaying fares for August-2026
  • ONT–MDW, 08/25/2026: From $139
    25

    Tue

    AUG

  • ONT–MDW, 08/26/2026: From $139
    26

    Wed

  • ONT–MDW, 08/27/2026: From $160
    27

    Thu

  • ONT–MDW, 08/28/2026: From $160
    28

    Fri

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

    Sat

  • ONT–MDW, 08/30/2026: From $139
    30

    Sun

  • ONT–MDW, 08/31/2026: From $139
    31

    Mon

  • ONT–MDW, 09/01/2026: From $139
    01

    Tue

    SEP

  • ONT–MDW, 09/02/2026: From $184
    02

    Wed

  • ONT–MDW, 09/03/2026: From $279
    03

    Thu

  • ONT–MDW, 09/04/2026: From $229
    04

    Fri

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

    Sat

  • ONT–MDW, 09/06/2026: From $160
    06

    Sun

  • ONT–MDW, 09/07/2026: From $269
    07

    Mon

  • ONT–MDW, 09/08/2026: From $184
    08

    Tue

  • ONT–MDW, 09/09/2026: From $139
    09

    Wed

  • ONT–MDW, 09/10/2026: From $181
    10

    Thu

  • ONT–MDW, 09/11/2026: From $129
    11

    Fri

  • ONT–MDW, 09/12/2026: From $129
    12

    Sat

  • ONT–MDW, 09/13/2026: From $160
    13

    Sun

  • ONT–MDW, 09/14/2026: From $130
    14

    Mon

  • ONT–MDW, 09/15/2026: From $129
    15

    Tue

  • ONT–MDW, 09/16/2026: From $184
    16

    Wed

  • ONT–MDW, 09/17/2026: From $244
    17

    Thu

  • ONT–MDW, 09/18/2026: From $139
    18

    Fri

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

    Sat

  • ONT–MDW, 09/20/2026: From $150
    20

    Sun

  • ONT–MDW, 09/21/2026: From $120
    21

    Mon

  • ONT–MDW, 09/22/2026: From $120
    22

    Tue

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

    Wed

  • ONT–MDW, 09/24/2026: From $239
    24

    Thu

    • Range$120-$279

    *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:
    O'Hare International Airport
    Distance:
    1700 miles

    Route Information

    87† 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 87 weekly flights from Ontario/LA to Chicago (O'Hare) on Southwest Airlines.
    To find the lowest fares by day and time to fly Ontario/LA to Chicago (O'Hare) with Southwest, check out our Low Fare Calendar.
    You can rent a car at O'Hare International Airport book yours with your flight.
    Yes! Flights from Ontario/LA to Chicago (O'Hare)—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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