Southwest® flights from St. Louis to Kansas City from $123

Promo Code

Low fares from St. Louis to Kansas City

$

St. Louis (STL)to

Kansas City (MCI)
Depart: 11/21/2026

One-way

Basic

From
$123
Seen: 5 hrs ago

St. Louis (STL)to

Kansas City (MCI)
Depart: 11/23/2026

One-way

Basic

From
$123
Seen: 18 hrs ago

St. Louis (STL)to

Kansas City (MCI)
Depart: 11/22/2026

One-way

Basic

From
$123
Seen: 6 hrs ago

St. Louis (STL)to

Kansas City (MCI)
Depart: 11/23/2026

One-way

Choice

From
$158
Seen: 18 hrs ago

St. Louis (STL)to

Kansas City (MCI)
Depart: 11/21/2026

One-way

Choice

From
$158
Seen: 5 hrs ago

St. Louis (STL)to

Kansas City (MCI)
Depart: 11/22/2026

One-way

Choice

From
$158
Seen: 6 hrs ago

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Explore flights from St. Louis to Kansas City

Oct 2026
From$172*
Seen: 3 hrs ago
One Way/Basic
Nov 2026
From$123*
Seen: 5 hrs ago
One Way/Basic
Dec 2026
From$172*
Seen: 16 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $172
cmp-daily-histogram-bars-legend-max-price-aria-label $453
Displaying fares for October-2026
  • STL–MCI, 10/03/2026: From $453
    03

    Sat

    OCT

  • STL–MCI: cmp-view-offers-disclaimer. Find Offers
    04

    Sun

  • STL–MCI, 10/05/2026: From $453
    05

    Mon

  • STL–MCI, 10/06/2026: From $453
    06

    Tue

  • STL–MCI, 10/07/2026: From $453
    07

    Wed

  • STL–MCI, 10/08/2026: From $453
    08

    Thu

  • STL–MCI, 10/09/2026: From $453
    09

    Fri

  • STL–MCI, 10/10/2026: From $392
    10

    Sat

  • STL–MCI, 10/11/2026: From $392
    11

    Sun

  • STL–MCI, 10/12/2026: From $392
    12

    Mon

  • STL–MCI, 10/13/2026: From $392
    13

    Tue

  • STL–MCI, 10/14/2026: From $392
    14

    Wed

  • STL–MCI, 10/15/2026: From $392
    15

    Thu

  • STL–MCI, 10/16/2026: From $262
    16

    Fri

  • STL–MCI, 10/17/2026: From $262
    17

    Sat

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

    Sun

  • STL–MCI, 10/19/2026: From $262
    19

    Mon

  • STL–MCI: cmp-view-offers-disclaimer. Find Offers
    20

    Tue

  • STL–MCI, 10/21/2026: From $262
    21

    Wed

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

    Thu

  • STL–MCI, 10/23/2026: From $172
    23

    Fri

  • STL–MCI, 10/24/2026: From $231
    24

    Sat

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

    Sun

  • STL–MCI, 10/26/2026: From $172
    26

    Mon

  • STL–MCI, 10/27/2026: From $221
    27

    Tue

  • STL–MCI, 10/28/2026: From $221
    28

    Wed

  • STL–MCI, 10/29/2026: From $172
    29

    Thu

  • STL–MCI, 10/30/2026: From $231
    30

    Fri

  • STL–MCI, 10/31/2026: From $231
    31

    Sat

  • STL–MCI: cmp-view-offers-disclaimer. Find Offers
    01

    Sun

    NOV

  • STL–MCI, 11/02/2026: From $172
    02

    Mon

    • Range$172-$453

    *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:
    Kansas City International Airport
    Average flight time:
    1 hour 5 minutes
    Distance:
    237 miles

    Route Information

    130† 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 St. Louis to Kansas City is 1 hour 5 minutes.
    There are 130 weekly flights from St. Louis to Kansas City on Southwest Airlines.
    Yes, Southwest flies nonstop from St. Louis to Kansas City 3 times per day from Monday through Friday.
    Yes, Southwest flies nonstop from St. Louis to Kansas City 2 times per day on Saturdays and 3 times per day on Sundays.
    To find the lowest fares by day and time to fly St. Louis to Kansas City with Southwest, check out our Low Fare Calendar.
    You can rent a car at Kansas City International Airport book yours with your flight.
    Yes! Flights from St. Louis to Kansas City—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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