Southwest® flights from St. Louis to Las Vegas from $199

Promo Code

Low fares from St. Louis to Las Vegas

$

St. Louis (STL)to

Las Vegas (LAS)
Depart: 09/11/2026

One-way

Basic

From
$199
Seen: 6 hrs ago

St. Louis (STL)to

Las Vegas (LAS)
Depart: 10/30/2026

One-way

Basic

From
$199
Seen: 14 hrs ago

St. Louis (STL)to

Las Vegas (LAS)
Depart: 09/06/2026

One-way

Basic

From
$199
Seen: 20 hrs ago

St. Louis (STL)to

Las Vegas (LAS)
Depart: 09/05/2026

One-way

Basic

From
$204
Seen: 6 hrs ago

St. Louis (STL)to

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

One-way

Basic

From
$219
Seen: 21 hrs ago

St. Louis (STL)to

Las Vegas (LAS)
Depart: 10/28/2026

One-way

Basic

From
$219
Seen: 19 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$240*
Seen: 16 hrs ago
One Way/Basic
Sep 2026
From$199*
Seen: 6 hrs ago
One Way/Basic
Oct 2026
From$199*
Seen: 14 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $199
cmp-daily-histogram-bars-legend-max-price-aria-label $574
Displaying fares for August-2026
  • STL–LAS, 08/08/2026: From $240
    08

    Sat

    AUG

  • STL–LAS, 08/09/2026: From $574
    09

    Sun

  • STL–LAS, 08/10/2026: From $574
    10

    Mon

  • STL–LAS, 08/11/2026: From $574
    11

    Tue

  • STL–LAS, 08/12/2026: From $574
    12

    Wed

  • STL–LAS, 08/13/2026: From $574
    13

    Thu

  • STL–LAS, 08/14/2026: From $574
    14

    Fri

  • STL–LAS, 08/15/2026: From $498
    15

    Sat

  • STL–LAS, 08/16/2026: From $503
    16

    Sun

  • STL–LAS, 08/17/2026: From $503
    17

    Mon

  • STL–LAS, 08/18/2026: From $503
    18

    Tue

  • STL–LAS: cmp-view-offers-disclaimer. Find Offers
    19

    Wed

  • STL–LAS, 08/20/2026: From $503
    20

    Thu

  • STL–LAS, 08/21/2026: From $503
    21

    Fri

  • STL–LAS, 08/22/2026: From $319
    22

    Sat

  • STL–LAS, 08/23/2026: From $324
    23

    Sun

  • STL–LAS, 08/24/2026: From $324
    24

    Mon

  • STL–LAS, 08/25/2026: From $324
    25

    Tue

  • STL–LAS, 08/26/2026: From $324
    26

    Wed

  • STL–LAS, 08/27/2026: From $324
    27

    Thu

  • STL–LAS, 08/28/2026: From $324
    28

    Fri

  • STL–LAS, 08/29/2026: From $277
    29

    Sat

  • STL–LAS: cmp-view-offers-disclaimer. Find Offers
    30

    Sun

  • STL–LAS, 08/31/2026: From $282
    31

    Mon

  • STL–LAS, 09/01/2026: From $282
    01

    Tue

    SEP

  • STL–LAS, 09/02/2026: From $282
    02

    Wed

  • STL–LAS, 09/03/2026: From $282
    03

    Thu

  • STL–LAS, 09/04/2026: From $282
    04

    Fri

  • STL–LAS, 09/05/2026: From $204
    05

    Sat

  • STL–LAS, 09/06/2026: From $199
    06

    Sun

  • STL–LAS, 09/07/2026: From $240
    07

    Mon

    • Range$199-$574

    *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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