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: 10/14/2026

One-way

Basic

From
$139
Seen: 17 hrs ago

St. Louis (STL)to

Milwaukee (MKE)
Depart: 10/26/2026

One-way

Basic

From
$139
Seen: 16 hrs ago

St. Louis (STL)to

Milwaukee (MKE)
Depart: 10/28/2026

One-way

Basic

From
$139
Seen: 19 hrs ago

St. Louis (STL)to

Milwaukee (MKE)
Depart: 11/03/2026

One-way

Basic

From
$139
Seen: 22 hrs ago

St. Louis (STL)to

Milwaukee (MKE)
Depart: 10/17/2026

One-way

Basic

From
$139
Seen: 17 hrs ago

St. Louis (STL)to

Milwaukee (MKE)
Depart: 10/12/2026

One-way

Basic

From
$139
Seen: 19 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.

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Explore flights from St. Louis to Milwaukee

Sep 2026
From$178*
Seen: 22 hrs ago
One Way/Basic
Oct 2026
From$139*
Seen: 17 hrs ago
One Way/Basic
Nov 2026
From$139*
Seen: 22 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $145
cmp-daily-histogram-bars-legend-max-price-aria-label $381
Displaying fares for September-2026
  • STL–MKE, 09/12/2026: From $381
    12

    Sat

    SEP

  • STL–MKE, 09/13/2026: From $381
    13

    Sun

  • STL–MKE, 09/14/2026: From $259
    14

    Mon

  • STL–MKE, 09/15/2026: From $254
    15

    Tue

  • STL–MKE, 09/16/2026: From $254
    16

    Wed

  • STL–MKE, 09/17/2026: From $254
    17

    Thu

  • STL–MKE, 09/18/2026: From $254
    18

    Fri

  • STL–MKE, 09/19/2026: From $254
    19

    Sat

  • STL–MKE, 09/20/2026: From $254
    20

    Sun

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

    Mon

  • STL–MKE, 09/22/2026: From $254
    22

    Tue

  • STL–MKE, 09/23/2026: From $254
    23

    Wed

  • STL–MKE, 09/24/2026: From $254
    24

    Thu

  • STL–MKE, 09/25/2026: From $188
    25

    Fri

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

    Sat

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

    Sun

  • STL–MKE, 09/28/2026: From $188
    28

    Mon

  • STL–MKE, 09/29/2026: From $188
    29

    Tue

  • STL–MKE, 09/30/2026: From $178
    30

    Wed

  • STL–MKE, 10/01/2026: From $188
    01

    Thu

    OCT

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

    Fri

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

    Sat

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

    Sun

  • STL–MKE, 10/05/2026: From $145
    05

    Mon

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

    Tue

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

    Wed

  • STL–MKE, 10/08/2026: From $145
    08

    Thu

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

    Fri

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

    Sat

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

    Sun

    • Range$145-$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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