Southwest® flights from Milwaukee to St. Louis from $134

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Low fares from Milwaukee to St. Louis

$

Milwaukee (MKE)to

St. Louis (STL)
Depart: 09/18/2026

One-way

Basic

From
$134
Seen: 10 hrs ago

Milwaukee (MKE)to

St. Louis (STL)
Depart: 09/24/2026

One-way

Basic

From
$134
Seen: 15 hrs ago

Milwaukee (MKE)to

St. Louis (STL)
Depart: 10/24/2026

One-way

Basic

From
$134
Seen: 8 hrs ago

Milwaukee (MKE)to

St. Louis (STL)
Depart: 10/12/2026

One-way

Basic

From
$134
Seen: 7 hrs ago

Milwaukee (MKE)to

St. Louis (STL)
Depart: 09/23/2026

One-way

Basic

From
$134
Seen: 2 hrs ago

Milwaukee (MKE)to

St. Louis (STL)
Depart: 10/16/2026

One-way

Basic

From
$134
Seen: 14 hrs ago

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Explore flights from Milwaukee to St. Louis

Aug 2026
From$234*
Seen: 17 hrs ago
One Way/Basic
Sep 2026
From$134*
Seen: 17 hrs ago
One Way/Basic
Oct 2026
From$134*
Seen: 6 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $134
cmp-daily-histogram-bars-legend-max-price-aria-label $371
Displaying fares for August-2026
  • MKE–STL, 08/21/2026: From $371
    21

    Fri

    AUG

  • MKE–STL, 08/22/2026: From $371
    22

    Sat

  • MKE–STL, 08/23/2026: From $234
    23

    Sun

  • MKE–STL, 08/24/2026: From $234
    24

    Mon

  • MKE–STL: cmp-view-offers-disclaimer. Find Offers
    25

    Tue

  • MKE–STL, 08/26/2026: From $234
    26

    Wed

  • MKE–STL, 08/27/2026: From $234
    27

    Thu

  • MKE–STL, 08/28/2026: From $234
    28

    Fri

  • MKE–STL, 08/29/2026: From $234
    29

    Sat

  • MKE–STL, 08/30/2026: From $234
    30

    Sun

  • MKE–STL, 08/31/2026: From $234
    31

    Mon

  • MKE–STL, 09/01/2026: From $234
    01

    Tue

    SEP

  • MKE–STL, 09/02/2026: From $234
    02

    Wed

  • MKE–STL, 09/03/2026: From $168
    03

    Thu

  • MKE–STL, 09/04/2026: From $168
    04

    Fri

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

    Sat

  • MKE–STL, 09/06/2026: From $168
    06

    Sun

  • MKE–STL, 09/07/2026: From $200
    07

    Mon

  • MKE–STL, 09/08/2026: From $168
    08

    Tue

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

    Wed

  • MKE–STL, 09/10/2026: From $134
    10

    Thu

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

    Fri

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

    Sat

  • MKE–STL, 09/13/2026: From $164
    13

    Sun

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

    Mon

  • MKE–STL: cmp-view-offers-disclaimer. Find Offers
    15

    Tue

  • MKE–STL, 09/16/2026: From $134
    16

    Wed

  • MKE–STL: cmp-view-offers-disclaimer. Find Offers
    17

    Thu

  • MKE–STL, 09/18/2026: From $134
    18

    Fri

  • MKE–STL: cmp-view-offers-disclaimer. Find Offers
    19

    Sat

  • MKE–STL, 09/20/2026: From $164
    20

    Sun

    • Range$134-$371

    *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:
    General Mitchell Airport
    Arriving at:
    Lambert-St Louis Int'l Airport
    Average flight time:
    1 hour 19 minutes
    Distance:
    317 miles

    Route Information

    128† Weekly flights
    • 2‡ Nonstop flights per day Monday through Friday
    • 1‡ Nonstop flight on Saturday
    • 2‡ Nonstop flights on Sunday

    † 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

    The average flight time from Milwaukee to St. Louis is 1 hour 19 minutes.
    There are 128 weekly flights from Milwaukee to St. Louis on Southwest Airlines.
    Yes, Southwest flies nonstop from Milwaukee to St. Louis 2 times per day from Monday through Friday.
    Yes, Southwest flies nonstop from Milwaukee to St. Louis once per day on Saturdays and 2 times per day on Sundays.
    To find the lowest fares by day and time to fly Milwaukee to St. Louis with Southwest, check out our Low Fare Calendar.
    You can rent a car at Lambert-St Louis Int'l Airport book yours with your flight.
    Yes! Flights from Milwaukee to St. Louis—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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