Flights from Las Vegas (LAS) to St. Louis (STL)

Take a break from the Las Vegas strip and step through the Gateway to the West! Southwest Airlines® has flights from Las Vegas McCarran International Airport to Lambert-St. Louis International Airport that make booking your next getaway a breeze. Search for flights to St. Louis with Southwest® and book with confidence. If your upcoming travel dates are flexible, use our Low Fare Calendar to find the lowest fares we’ve got. Before you go, explore Southwest Vacations® to find package deals on flights, rental cars, hotels, and more.

Check out Las Vegas to St. Louis flights and book your trip today!

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Middle seats open through November 30

Full exchange of fresh, outdoor air every 2-3 minutes while inflight

Face coverings required

Flight details

Average flight time: 3 hours 3 minutes

Departing from: McCarran International Airport (LAS)

Arriving at: Lambert-St. Louis International Airport (STL)


Route information*


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*Based on DOT published scheduled average flights Monday-Friday between 8/20/2020 and 4/11/2021, as of 8/20/2020.

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.

When you’ve worked up an appetite after a long day of sightseeing, you won’t be disappointed by St. Louis’s culinary scene! Explore the restaurants and bars in Delmar Loop, one of the city’s best shopping and entertainment districts complete with a Hollywood-style Walk of Fame for St. Louis celebrities. Chow down on deep-fried toasted ravioli, thin crust pizza with Provel cheese, and, of course, frozen custard.

Travel tips


Infancy policy

One child over 14 days and under two (2) years of age, not occupying a seat, may be carried free of charge when traveling with an adult (12 years of age or older). Learn more.


Pet policy

Customers flying with a pet are subject to a pet fare. To learn more about traveling with your furry friend, explore the Southwest® pet policy.


Unaccompanied minor

Minors under the age of 18 are not permitted to fly unaccompanied on international flights or any itinerary that includes an international flight. Learn more.


Bags fly free®1

Start packing! Every ticketed Customer’s first two checked bags are free. Learn more.


The Southwest travel experience

At Southwest, we know that finding cheap flights from McCarran to Lambert-St. Louis International is only the first step toward a memorable trip. That’s why we strive to make your travel experience as smooth as possible, with services and perks from booking to boarding. Learn more about the Southwest® Experience before you book your Las Vegas to St. Louis flight.

No matter which of our exciting destinations you choose, it’s simple and fun to fly with Southwest. You can search for your next flight to St. Louis knowing that you won’t be hassled by hidden fees—we offer low fares and, as always, bags fly free. That’s our Transfarency® promise. Enroll in our Click 'N Save® emails and be the first to know about our latest flight deals. Looking for tours, activities, and more hidden gems? Check out Southwest Airlines® Experiences and earn Rapid Rewards® points when you fly.

1First and second checked bags. Weight and size limits apply.

2Fare difference may apply.