Southwest® flights from Kansas City to St. Louis from $119

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Low fares from Kansas City to St. Louis

$

Kansas City (MCI)to

St. Louis (STL)
Depart: 09/11/2026

One-way

Basic

From
$119
Seen: 17 hrs ago

Kansas City (MCI)to

St. Louis (STL)
Depart: 08/26/2026

One-way

Basic

From
$136
Seen: 18 hrs ago

Kansas City (MCI)to

St. Louis (STL)
Depart: 10/08/2026

One-way

Basic

From
$136
Seen: 17 hrs ago

Kansas City (MCI)to

St. Louis (STL)
Depart: 10/17/2026

One-way

Basic

From
$136
Seen: 16 hrs ago

Kansas City (MCI)to

St. Louis (STL)
Depart: 08/24/2026

One-way

Basic

From
$136
Seen: 8 hrs ago

Kansas City (MCI)to

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

One-way

Basic

From
$136
Seen: 5 hrs ago

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Explore flights from Kansas City to St. Louis

Aug 2026
From$136*
Seen: 1 hour ago
One Way/Basic
Sep 2026
From$119*
Seen: 17 hrs ago
One Way/Basic
Oct 2026
From$136*
Seen: 15 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $136
cmp-daily-histogram-bars-legend-max-price-aria-label $433
Displaying fares for August-2026
  • MCI–STL, 08/02/2026: From $433
    02

    Sun

    AUG

  • MCI–STL, 08/03/2026: From $433
    03

    Mon

  • MCI–STL, 08/04/2026: From $433
    04

    Tue

  • MCI–STL, 08/05/2026: From $433
    05

    Wed

  • MCI–STL, 08/06/2026: From $433
    06

    Thu

  • MCI–STL, 08/07/2026: From $372
    07

    Fri

  • MCI–STL, 08/08/2026: From $372
    08

    Sat

  • MCI–STL, 08/09/2026: From $372
    09

    Sun

  • MCI–STL, 08/10/2026: From $372
    10

    Mon

  • MCI–STL, 08/11/2026: From $372
    11

    Tue

  • MCI–STL, 08/12/2026: From $372
    12

    Wed

  • MCI–STL, 08/13/2026: From $372
    13

    Thu

  • MCI–STL, 08/14/2026: From $242
    14

    Fri

  • MCI–STL, 08/15/2026: From $242
    15

    Sat

  • MCI–STL, 08/16/2026: From $242
    16

    Sun

  • MCI–STL, 08/17/2026: From $242
    17

    Mon

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

    Tue

  • MCI–STL, 08/19/2026: From $242
    19

    Wed

  • MCI–STL, 08/20/2026: From $242
    20

    Thu

  • MCI–STL, 08/21/2026: From $242
    21

    Fri

  • MCI–STL, 08/22/2026: From $136
    22

    Sat

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

    Sun

  • MCI–STL, 08/24/2026: From $136
    24

    Mon

  • MCI–STL, 08/25/2026: From $136
    25

    Tue

  • MCI–STL, 08/26/2026: From $136
    26

    Wed

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

    Thu

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

    Fri

  • MCI–STL: cmp-view-offers-disclaimer. Find Offers
    29

    Sat

  • MCI–STL, 08/30/2026: From $169
    30

    Sun

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

    Mon

  • MCI–STL, 09/01/2026: From $136
    01

    Tue

    SEP

    • Range$136-$433

    *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:
    Kansas City International Airport
    Arriving at:
    Lambert-St Louis Int'l Airport
    Average flight time:
    1 hour 3 minutes
    Distance:
    237 miles

    Route Information

    156† Weekly flights
    • 3‡ Nonstop flights per day Monday through Friday
    • 2‡ Nonstop flights on Saturday
    • 3‡ 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 Kansas City to St. Louis is 1 hour 3 minutes.
    There are 156 weekly flights from Kansas City to St. Louis on Southwest Airlines.
    Yes, Southwest flies nonstop from Kansas City to St. Louis 3 times per day from Monday through Friday.
    Yes, Southwest flies nonstop from Kansas City to St. Louis 2 times per day on Saturdays and 3 times per day on Sundays.
    To find the lowest fares by day and time to fly Kansas City 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 Kansas City 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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