Southwest® flights from Las Vegas to St. Louis from $120
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Low fares from Las Vegas to St. Louis
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Las Vegas (LAS)to
St. Louis (STL)
Depart: 02/24/2026
One-way
Basic
From
$120
Seen: 27 minutes ago
Las Vegas (LAS)to
St. Louis (STL)
Depart: 01/07/2026
One-way
Basic
From
$120
Seen: 2 hrs ago
Las Vegas (LAS)to
St. Louis (STL)
Depart: 03/04/2026
One-way
Basic
From
$120
Seen: 1 hour ago
Las Vegas (LAS)to
St. Louis (STL)
Depart: 01/14/2026
One-way
Basic
From
$120
Seen: 1 hour ago
Las Vegas (LAS)to
St. Louis (STL)
Depart: 01/13/2026
One-way
Basic
From
$120
Seen: 1 hour ago
Las Vegas (LAS)to
St. Louis (STL)
Depart: 02/21/2026
One-way
Basic
From
$150
Seen: 5 minutes ago
Explore flights from Las Vegas to St. Louis
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Travel tips for your next Southwest flight
How to board the plane earlier on open seating flights departing on or before January 26, 2026:
Southwest seats are first come, first served based on check-in order. But there are ways to board the plane earlier!
- Purchase EarlyBird Check-In®1 for automatic check-in and a better boarding position.
- Purchase Upgraded Boarding2 to get an A1-A15 boarding position (depending on availability).
- Purchase a Business Select® fare or upgrade to Business Select to get a guaranteed A1-A15 boarding position.
Enjoy movies, sips, and snacks during your flight.
Take advantage of inflight entertainment with free movies4, free live TV5, free texting6, and $8 inflight Internet7.
We also offer free sodas, coffee, and snacks8—learn more about the inflight food and beverage experience.
Make the most of our Rapid Rewards® Program.
Rapid Rewards Members can redeem their points for flights, hotel stays, rental cars, gift cards, and more. And your points never expire!
Flight Details
Departing from:
McCarran International Airport
Arriving at:
Lambert-St Louis Int'l Airport
Average flight time:
3 hours 12 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.
Explore St. Louis
St. Louis is well-known for a number of reasons: it was the birthplace of the ice cream cone, and, most importantly, it’s the American city with the most free tourist attractions outside of Washington, D.C. Start your vacation with one of said free (and kid-friendly!) attractions, such as the iconic St. Louis Zoo, or ride the elevator up the 630-foot Gateway Arch for unbeatable city views. Kids and adults alike will love the City Museum with its playground full of climbing structures, slides, and more.
If you’re looking for something a little more meditative, St. Louis is a great city for art. Spend an afternoon checking out the collections at the St. Louis Art Museum, the Contemporary Art Museum of St. Louis, and the Mildred Lane Kemper Art Museum, or catch a concert at the St. Louis Symphony. Rather be outside? Pay a visit to Laumeier Sculpture Park, a green space with more than 70 outdoor sculptures that also hosts events in its music amphitheater.
Questions we hear the most
The average flight time from Las Vegas to St. Louis is 3 hours 12 minutes.
There are 156 weekly flights from Las Vegas to St. Louis on Southwest Airlines.
Yes, Southwest flies nonstop from Las Vegas to St. Louis 5 times per day from Monday through Friday.
Yes, Southwest flies nonstop from Las Vegas to St. Louis 4 times per day on Saturdays and 6 times per day on Sundays.
To find the lowest fares by day and time to fly Las Vegas 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 Las Vegas 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 Las Vegas
1EarlyBird Check-In® pricing starts at $15 one-way, and is subject to availability. Pricing may vary based on the popularity and length of each (one-way) flight. Please see optional travel charges for more details.
2Upgraded boarding prices and benefits are per eligible segment. Flights must be within 24 hours of departure to be eligible for upgraded boarding.
3Where available. Available only on WiFi-enabled aircraft. Limited-time offer.
4Due to licensing restrictions, on WiFi-enabled international flights, free live TV and iHeartRadio may not be available for the full duration of flight.
5Texting only allows access to iMessage and WhatsApp (which must be downloaded and activated before connecting to SouthwestWiFi).
6Internet access for $8 per device from takeoff to landing. Price is subject to change. May not be available for the full duration of flight. In order to provide a top-notch Internet experience, we prohibit access to certain high-bandwidth applications and websites. We also prohibit access to certain obscene or offensive content.
7Flights traveling 175 miles or less will have only water available. Complimentary snacks are served on flights over 175 miles. If you’re flying between Hawaii and the continental U.S., you’ll have even more snacks to choose from.