Southwest® flights from Ontario/LA to Milwaukee from $189

Promo Code

Low fares from Ontario/LA to Milwaukee

$

Ontario/LA (ONT)to

Milwaukee (MKE)
Depart: 11/09/2026

One-way

Basic

From
$189
Seen: 18 hrs ago

Ontario/LA (ONT)to

Milwaukee (MKE)
Depart: 11/19/2026

One-way

Basic

From
$189
Seen: 19 hrs ago

Ontario/LA (ONT)to

Milwaukee (MKE)
Depart: 11/17/2026

One-way

Basic

From
$189
Seen: 12 hrs ago

Ontario/LA (ONT)to

Milwaukee (MKE)
Depart: 11/10/2026

One-way

Basic

From
$189
Seen: 17 hrs ago

Ontario/LA (ONT)to

Milwaukee (MKE)
Depart: 11/12/2026

One-way

Basic

From
$189
Seen: 21 hrs ago

Ontario/LA (ONT)to

Milwaukee (MKE)
Depart: 10/31/2026

One-way

Basic

From
$189
Seen: 23 hrs ago

Looking for more low-fare flights?

Check out the Low Fare Calendar to find a fare that works for you. Just choose the month you want to depart and return, and we’ll show you the best fares available.

Find low fares

Explore flights from Ontario/LA to Milwaukee

Oct 2026
From$189*
Seen: 23 hrs ago
One Way/Basic
Nov 2026
From$189*
Seen: 17 hrs ago
One Way/Basic
Dec 2026
From$205*
Seen: 20 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $189
cmp-daily-histogram-bars-legend-max-price-aria-label $382
Displaying fares for October-2026
  • ONT–MKE, 10/01/2026: From $382
    01

    Thu

    OCT

  • ONT–MKE, 10/02/2026: From $382
    02

    Fri

  • ONT–MKE, 10/03/2026: From $294
    03

    Sat

  • ONT–MKE, 10/04/2026: From $377
    04

    Sun

  • ONT–MKE, 10/05/2026: From $382
    05

    Mon

  • ONT–MKE, 10/06/2026: From $294
    06

    Tue

  • ONT–MKE, 10/07/2026: From $294
    07

    Wed

  • ONT–MKE, 10/08/2026: From $382
    08

    Thu

  • ONT–MKE, 10/09/2026: From $382
    09

    Fri

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

    Sat

  • ONT–MKE, 10/11/2026: From $377
    11

    Sun

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

    Mon

  • ONT–MKE, 10/13/2026: From $294
    13

    Tue

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

    Wed

  • ONT–MKE, 10/15/2026: From $314
    15

    Thu

  • ONT–MKE, 10/16/2026: From $314
    16

    Fri

  • ONT–MKE, 10/17/2026: From $294
    17

    Sat

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

    Sun

  • ONT–MKE, 10/19/2026: From $319
    19

    Mon

  • ONT–MKE, 10/20/2026: From $299
    20

    Tue

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

    Wed

  • ONT–MKE, 10/22/2026: From $354
    22

    Thu

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

    Fri

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

    Sat

  • ONT–MKE, 10/25/2026: From $280
    25

    Sun

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

    Mon

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

    Tue

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

    Wed

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

    Thu

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

    Fri

  • ONT–MKE, 10/31/2026: From $189
    31

    Sat

    • Range$189-$382

    *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.

    Explore Flights from Other Popular Origins

    Popular Flights from Ontario/LA