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

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Low fares from St. Louis to Milwaukee

$

St. Louis (STL)to

Milwaukee (MKE)
Depart: 12/23/2026

One-way

Basic

From
$139
Seen: 23 hrs ago

St. Louis (STL)to

Milwaukee (MKE)
Depart: 10/28/2026

One-way

Basic

From
$139
Seen: 12 hrs ago

St. Louis (STL)to

Milwaukee (MKE)
Depart: 12/02/2026

One-way

Basic

From
$139
Seen: 13 hrs ago

St. Louis (STL)to

Milwaukee (MKE)
Depart: 10/24/2026

One-way

Basic

From
$139
Seen: 7 hrs ago

St. Louis (STL)to

Milwaukee (MKE)
Depart: 11/05/2026

One-way

Basic

From
$139
Seen: 21 hrs ago

St. Louis (STL)to

Milwaukee (MKE)
Depart: 11/04/2026

One-way

Basic

From
$139
Seen: 20 hrs ago

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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.

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Explore flights from St. Louis to Milwaukee

Oct 2026
From$139*
Seen: 12 hrs ago
One Way/Basic
Nov 2026
From$139*
Seen: 21 hrs ago
One Way/Basic
Dec 2026
From$139*
Seen: 2 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $139
cmp-daily-histogram-bars-legend-max-price-aria-label $381
Displaying fares for October-2026
  • STL–MKE, 10/02/2026: From $381
    02

    Fri

    OCT

  • STL–MKE, 10/03/2026: From $381
    03

    Sat

  • STL–MKE, 10/04/2026: From $254
    04

    Sun

  • STL–MKE, 10/05/2026: From $254
    05

    Mon

  • STL–MKE, 10/06/2026: From $254
    06

    Tue

  • STL–MKE, 10/07/2026: From $254
    07

    Wed

  • STL–MKE, 10/08/2026: From $254
    08

    Thu

  • STL–MKE, 10/09/2026: From $254
    09

    Fri

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

    Sat

  • STL–MKE, 10/11/2026: From $254
    11

    Sun

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

    Mon

  • STL–MKE, 10/13/2026: From $254
    13

    Tue

  • STL–MKE, 10/14/2026: From $254
    14

    Wed

  • STL–MKE, 10/15/2026: From $220
    15

    Thu

  • STL–MKE, 10/16/2026: From $188
    16

    Fri

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

    Sat

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

    Sun

  • STL–MKE, 10/19/2026: From $220
    19

    Mon

  • STL–MKE, 10/20/2026: From $188
    20

    Tue

  • STL–MKE, 10/21/2026: From $188
    21

    Wed

  • STL–MKE, 10/22/2026: From $188
    22

    Thu

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

    Fri

  • STL–MKE, 10/24/2026: From $139
    24

    Sat

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

    Sun

  • STL–MKE, 10/26/2026: From $139
    26

    Mon

  • STL–MKE, 10/27/2026: From $139
    27

    Tue

  • STL–MKE, 10/28/2026: From $139
    28

    Wed

  • STL–MKE, 10/29/2026: From $139
    29

    Thu

  • STL–MKE, 10/30/2026: From $188
    30

    Fri

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

    Sat

  • STL–MKE, 11/01/2026: From $188
    01

    Sun

    NOV

    • Range$139-$381

    *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:
    Lambert-St Louis Int'l Airport
    Arriving at:
    General Mitchell Airport
    Average flight time:
    1 hour 14 minutes
    Distance:
    317 miles

    Route Information

    89† 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 St. Louis to Milwaukee is 1 hour 14 minutes.
    There are 89 weekly flights from St. Louis to Milwaukee on Southwest Airlines.
    Yes, Southwest flies nonstop from St. Louis to Milwaukee 2 times per day from Monday through Friday.
    Yes, Southwest flies nonstop from St. Louis to Milwaukee once per day on Saturdays and 2 times per day on Sundays.
    To find the lowest fares by day and time to fly St. Louis 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 St. Louis 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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