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: 10/30/2026

One-way

Basic

From
$120
Seen: 20 hrs ago

Ontario/LA (ONT)to

Chicago (Midway) (MDW)
Depart: 09/11/2026

One-way

Basic

From
$120
Seen: 19 hrs ago

Ontario/LA (ONT)to

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

One-way

Basic

From
$135
Seen: 15 hrs ago

Ontario/LA (ONT)to

Chicago (Midway) (MDW)
Depart: 09/12/2026

One-way

Basic

From
$135
Seen: 17 hrs ago

Ontario/LA (ONT)to

Chicago (Midway) (MDW)
Depart: 08/26/2026

One-way

Basic

From
$135
Seen: 13 hrs ago

Ontario/LA (ONT)to

Chicago (Midway) (MDW)
Depart: 10/19/2026

One-way

Basic

From
$135
Seen: 12 hrs ago

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

Aug 2026
From$135*
Seen: 13 hrs ago
One Way/Basic
Sep 2026
From$120*
Seen: 19 hrs ago
One Way/Basic
Oct 2026
From$120*
Seen: 20 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $135
cmp-daily-histogram-bars-legend-max-price-aria-label $499
Displaying fares for August-2026
  • ONT–MDW: cmp-view-offers-disclaimer. Find Offers
    05

    Wed

    AUG

  • ONT–MDW: cmp-view-offers-disclaimer. Find Offers
    06

    Thu

  • ONT–MDW, 08/07/2026: From $489
    07

    Fri

  • ONT–MDW, 08/08/2026: From $499
    08

    Sat

  • ONT–MDW, 08/09/2026: From $489
    09

    Sun

  • ONT–MDW, 08/10/2026: From $489
    10

    Mon

  • ONT–MDW, 08/11/2026: From $489
    11

    Tue

  • ONT–MDW, 08/12/2026: From $489
    12

    Wed

  • ONT–MDW, 08/13/2026: From $489
    13

    Thu

  • ONT–MDW, 08/14/2026: From $489
    14

    Fri

  • ONT–MDW, 08/15/2026: From $489
    15

    Sat

  • ONT–MDW, 08/16/2026: From $489
    16

    Sun

  • ONT–MDW, 08/17/2026: From $489
    17

    Mon

  • ONT–MDW, 08/18/2026: From $169
    18

    Tue

  • ONT–MDW, 08/19/2026: From $320
    19

    Wed

  • ONT–MDW, 08/20/2026: From $330
    20

    Thu

  • ONT–MDW, 08/21/2026: From $320
    21

    Fri

  • ONT–MDW, 08/22/2026: From $169
    22

    Sat

  • ONT–MDW, 08/23/2026: From $320
    23

    Sun

  • ONT–MDW, 08/24/2026: From $320
    24

    Mon

  • ONT–MDW, 08/25/2026: From $135
    25

    Tue

  • ONT–MDW, 08/26/2026: From $135
    26

    Wed

  • ONT–MDW, 08/27/2026: From $145
    27

    Thu

  • ONT–MDW, 08/28/2026: From $182
    28

    Fri

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

    Sat

  • ONT–MDW, 08/30/2026: From $239
    30

    Sun

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

    Mon

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

    Tue

    SEP

  • ONT–MDW, 09/02/2026: From $145
    02

    Wed

  • ONT–MDW, 09/03/2026: From $297
    03

    Thu

  • ONT–MDW, 09/04/2026: From $297
    04

    Fri

    • Range$135-$499

    *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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