Southwest® flights from St. Louis to Las Vegas from $203

Promo Code

Low fares from St. Louis to Las Vegas

$

St. Louis (STL)to

Las Vegas (LAS)
Depart: 11/03/2026

One-way

Basic

From
$203
Seen: 5 hrs ago

St. Louis (STL)to

Las Vegas (LAS)
Depart: 09/19/2026

One-way

Basic

From
$203
Seen: 9 hrs ago

St. Louis (STL)to

Las Vegas (LAS)
Depart: 11/18/2026

One-way

Basic

From
$203
Seen: 5 hrs ago

St. Louis (STL)to

Las Vegas (LAS)
Depart: 09/26/2026

One-way

Basic

From
$203
Seen: 8 hrs ago

St. Louis (STL)to

Las Vegas (LAS)
Depart: 10/05/2026

One-way

Basic

From
$203
Seen: 12 hrs ago

St. Louis (STL)to

Las Vegas (LAS)
Depart: 10/29/2026

One-way

Basic

From
$203
Seen: 13 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 Las Vegas

Aug 2026
From$579*
Seen: 21 hrs ago
One Way/Basic
Sep 2026
From$203*
Seen: 9 hrs ago
One Way/Basic
Oct 2026
From$203*
Seen: 9 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $203
cmp-daily-histogram-bars-legend-max-price-aria-label $584
Displaying fares for August-2026
  • STL–LAS, 08/28/2026: From $584
    28

    Fri

    AUG

  • STL–LAS, 08/29/2026: From $579
    29

    Sat

  • STL–LAS, 08/30/2026: From $584
    30

    Sun

  • STL–LAS, 08/31/2026: From $584
    31

    Mon

  • STL–LAS, 09/01/2026: From $584
    01

    Tue

    SEP

  • STL–LAS, 09/02/2026: From $584
    02

    Wed

  • STL–LAS, 09/03/2026: From $584
    03

    Thu

  • STL–LAS, 09/04/2026: From $513
    04

    Fri

  • STL–LAS, 09/05/2026: From $508
    05

    Sat

  • STL–LAS, 09/06/2026: From $513
    06

    Sun

  • STL–LAS, 09/07/2026: From $513
    07

    Mon

  • STL–LAS, 09/08/2026: From $513
    08

    Tue

  • STL–LAS, 09/09/2026: From $513
    09

    Wed

  • STL–LAS, 09/10/2026: From $513
    10

    Thu

  • STL–LAS, 09/11/2026: From $334
    11

    Fri

  • STL–LAS, 09/12/2026: From $329
    12

    Sat

  • STL–LAS, 09/13/2026: From $334
    13

    Sun

  • STL–LAS, 09/14/2026: From $334
    14

    Mon

  • STL–LAS, 09/15/2026: From $334
    15

    Tue

  • STL–LAS, 09/16/2026: From $334
    16

    Wed

  • STL–LAS, 09/17/2026: From $334
    17

    Thu

  • STL–LAS, 09/18/2026: From $247
    18

    Fri

  • STL–LAS, 09/19/2026: From $203
    19

    Sat

  • STL–LAS, 09/20/2026: From $292
    20

    Sun

  • STL–LAS, 09/21/2026: From $208
    21

    Mon

  • STL–LAS, 09/22/2026: From $208
    22

    Tue

  • STL–LAS, 09/23/2026: From $208
    23

    Wed

  • STL–LAS, 09/24/2026: From $252
    24

    Thu

  • STL–LAS, 09/25/2026: From $247
    25

    Fri

  • STL–LAS, 09/26/2026: From $203
    26

    Sat

  • STL–LAS, 09/27/2026: From $284
    27

    Sun

    • Range$203-$584

    *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:
    McCarran International Airport
    Average flight time:
    3 hours 31 minutes
    Distance:
    1371 miles

    Route Information

    156† Weekly flights
    • 5‡ Nonstop flights per day Monday through Friday
    • 4‡ Nonstop flights on Saturday
    • 6‡ 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 Las Vegas is 3 hours 31 minutes.
    There are 156 weekly flights from St. Louis to Las Vegas on Southwest Airlines.
    Yes, Southwest flies nonstop from St. Louis to Las Vegas 5 times per day from Monday through Friday.
    Yes, Southwest flies nonstop from St. Louis to Las Vegas 4 times per day on Saturdays and 6 times per day on Sundays.
    To find the lowest fares by day and time to fly St. Louis to Las Vegas with Southwest, check out our Low Fare Calendar.
    You can rent a car at McCarran International Airport book yours with your flight.
    Yes! Flights from St. Louis to Las Vegas—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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