Southwest® flights from Ontario/LA to Milwaukee from $169

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Low fares from Ontario/LA to Milwaukee

$

Ontario/LA (ONT)to

Milwaukee (MKE)
Depart: 09/29/2026

One-way

Basic

From
$169
Seen: 1 hour ago

Ontario/LA (ONT)to

Milwaukee (MKE)
Depart: 09/30/2026

One-way

Basic

From
$169
Seen: 1 hour ago

Ontario/LA (ONT)to

Milwaukee (MKE)
Depart: 10/21/2026

One-way

Basic

From
$169
Seen: 7 hrs ago

Ontario/LA (ONT)to

Milwaukee (MKE)
Depart: 10/07/2026

One-way

Basic

From
$174
Seen: 5 hrs ago

Ontario/LA (ONT)to

Milwaukee (MKE)
Depart: 10/23/2026

One-way

Basic

From
$185
Seen: 5 hrs ago

Ontario/LA (ONT)to

Milwaukee (MKE)
Depart: 09/15/2026

One-way

Basic

From
$189
Seen: 16 hrs ago

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Explore flights from Ontario/LA to Milwaukee

Aug 2026
From$284*
Seen: 11 hrs ago
One Way/Basic
Sep 2026
From$169*
Seen: 1 hour ago
One Way/Basic
Oct 2026
From$169*
Seen: 7 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $189
cmp-daily-histogram-bars-legend-max-price-aria-label $418
Displaying fares for August-2026
  • ONT–MKE: cmp-view-offers-disclaimer. Find Offers
    22

    Sat

    AUG

  • ONT–MKE, 08/23/2026: From $418
    23

    Sun

  • ONT–MKE: cmp-view-offers-disclaimer. Find Offers
    24

    Mon

  • ONT–MKE, 08/25/2026: From $284
    25

    Tue

  • ONT–MKE, 08/26/2026: From $284
    26

    Wed

  • ONT–MKE, 08/27/2026: From $372
    27

    Thu

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

    Fri

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

    Sat

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

    Sun

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

    Mon

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

    Tue

    SEP

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

    Wed

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

    Thu

  • ONT–MKE, 09/04/2026: From $304
    04

    Fri

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

    Sat

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

    Sun

  • ONT–MKE: cmp-view-offers-disclaimer. Find Offers
    07

    Mon

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

    Tue

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

    Wed

  • ONT–MKE, 09/10/2026: From $189
    10

    Thu

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

    Fri

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

    Sat

  • ONT–MKE: cmp-view-offers-disclaimer. Find Offers
    13

    Sun

  • ONT–MKE, 09/14/2026: From $212
    14

    Mon

  • ONT–MKE, 09/15/2026: From $189
    15

    Tue

  • ONT–MKE, 09/16/2026: From $189
    16

    Wed

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

    Thu

  • ONT–MKE, 09/18/2026: From $207
    18

    Fri

  • ONT–MKE, 09/19/2026: From $189
    19

    Sat

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

    Sun

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

    Mon

    • Range$189-$418

    *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:
    General Mitchell Airport
    Distance:
    1712 miles

    Route Information

    130† 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 130 weekly flights from Ontario/LA to Milwaukee on Southwest Airlines.
    To find the lowest fares by day and time to fly Ontario/LA to Milwaukee with Southwest, check out our Low Fare Calendar.
    You can rent a car at General Mitchell Airport book yours with your flight.
    Yes! Flights from Ontario/LA to Milwaukee—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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