Southwest® flights from Milwaukee to St. Louis from $139

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Low fares from Milwaukee to St. Louis

$

Milwaukee (MKE)to

St. Louis (STL)
Depart: 10/06/2026

One-way

Basic

From
$139
Seen: 15 hrs ago

Milwaukee (MKE)to

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

One-way

Basic

From
$139
Seen: 19 hrs ago

Milwaukee (MKE)to

St. Louis (STL)
Depart: 10/26/2026

One-way

Basic

From
$139
Seen: 22 hrs ago

Milwaukee (MKE)to

St. Louis (STL)
Depart: 11/26/2026

One-way

Basic

From
$139
Seen: 21 hrs ago

Milwaukee (MKE)to

St. Louis (STL)
Depart: 11/10/2026

One-way

Basic

From
$139
Seen: 11 hrs ago

Milwaukee (MKE)to

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

One-way

Basic

From
$139
Seen: 5 hrs ago

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Explore flights from Milwaukee to St. Louis

Sep 2026
From$139*
Seen: 15 hrs ago
One Way/Basic
Oct 2026
From$139*
Seen: 18 hrs ago
One Way/Basic
Nov 2026
From$139*
Seen: 14 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $139
cmp-daily-histogram-bars-legend-max-price-aria-label $371
Displaying fares for September-2026
  • MKE–STL, 09/10/2026: From $371
    10

    Thu

    SEP

  • MKE–STL, 09/11/2026: From $371
    11

    Fri

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

    Sat

  • MKE–STL, 09/13/2026: From $244
    13

    Sun

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

    Mon

  • MKE–STL, 09/15/2026: From $244
    15

    Tue

  • MKE–STL, 09/16/2026: From $244
    16

    Wed

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

    Thu

  • MKE–STL, 09/18/2026: From $244
    18

    Fri

  • MKE–STL, 09/19/2026: From $244
    19

    Sat

  • MKE–STL, 09/20/2026: From $244
    20

    Sun

  • MKE–STL, 09/21/2026: From $244
    21

    Mon

  • MKE–STL: cmp-view-offers-disclaimer. Find Offers
    22

    Tue

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

    Wed

  • MKE–STL, 09/24/2026: From $178
    24

    Thu

  • MKE–STL, 09/25/2026: From $178
    25

    Fri

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

    Sat

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

    Sun

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

    Mon

  • MKE–STL, 09/29/2026: From $178
    29

    Tue

  • MKE–STL, 09/30/2026: From $139
    30

    Wed

  • MKE–STL, 10/01/2026: From $139
    01

    Thu

    OCT

  • MKE–STL, 10/02/2026: From $145
    02

    Fri

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

    Sat

  • MKE–STL, 10/04/2026: From $175
    04

    Sun

  • MKE–STL, 10/05/2026: From $139
    05

    Mon

  • MKE–STL, 10/06/2026: From $139
    06

    Tue

  • MKE–STL, 10/07/2026: From $139
    07

    Wed

  • MKE–STL, 10/08/2026: From $139
    08

    Thu

  • MKE–STL, 10/09/2026: From $145
    09

    Fri

    • Range$139-$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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