Southwest® flights from Kansas City to St. Louis from $59

Promo Code

Low fares from Kansas City to St. Louis

$

Kansas City (MCI)to

St. Louis (STL)
Depart: 12/15/2026

One-way

Basic

From
$59
Seen: 14 hrs ago

Kansas City (MCI)to

St. Louis (STL)
Depart: 10/31/2026

One-way

Basic

From
$59
Seen: 17 hrs ago

Kansas City (MCI)to

St. Louis (STL)
Depart: 01/11/2027

One-way

Basic

From
$59
Seen: 20 hrs ago

Kansas City (MCI)to

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

One-way

Basic

From
$59
Seen: 11 hrs ago

Kansas City (MCI)to

St. Louis (STL)
Depart: 10/29/2026

One-way

Basic

From
$59
Seen: 23 hrs ago

Kansas City (MCI)to

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

One-way

Basic

From
$59
Seen: 20 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.

Find low fares

Explore flights from Kansas City to St. Louis

Oct 2026
From$59*
Seen: 17 hrs ago
One Way/Basic
Nov 2026
From$59*
Seen: 9 hrs ago
One Way/Basic
Dec 2026
From$59*
Seen: 20 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $59
cmp-daily-histogram-bars-legend-max-price-aria-label $453
Displaying fares for October-2026
  • MCI–STL, 10/03/2026: From $453
    03

    Sat

    OCT

  • MCI–STL, 10/04/2026: From $453
    04

    Sun

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

    Mon

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

    Tue

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

    Wed

  • MCI–STL, 10/08/2026: From $392
    08

    Thu

  • MCI–STL, 10/09/2026: From $392
    09

    Fri

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

    Sat

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

    Sun

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

    Mon

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

    Tue

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

    Wed

  • MCI–STL: cmp-view-offers-disclaimer. Find Offers
    15

    Thu

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

    Fri

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

    Sat

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

    Sun

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

    Mon

  • MCI–STL, 10/20/2026: From $262
    20

    Tue

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

    Wed

  • MCI–STL, 10/22/2026: From $262
    22

    Thu

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

    Fri

  • MCI–STL: cmp-view-offers-disclaimer. Find Offers
    24

    Sat

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

    Sun

  • MCI–STL, 10/26/2026: From $59
    26

    Mon

  • MCI–STL, 10/27/2026: From $94
    27

    Tue

  • MCI–STL, 10/28/2026: From $59
    28

    Wed

  • MCI–STL, 10/29/2026: From $59
    29

    Thu

  • MCI–STL, 10/30/2026: From $172
    30

    Fri

  • MCI–STL, 10/31/2026: From $59
    31

    Sat

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

    Sun

    NOV

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

    Mon

    • Range$59-$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:
    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.

    Explore Flights from Other Popular Origins

    Popular Flights from Kansas City