$144 Cheap Delta flights St. Louis (STL) to Las Vegas (LAS)

Landing cheap one-way Delta Air Lines flights from STL to LAS from $144 on Expedia couldn’t be easier — just filter by “Price (lowest to highest).” Alternatively, check out our affordable round-trip fares from $218 for your next exciting vacation.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

January is one of the least expensive months to jet away to Las Vegas with Delta Air Lines. You could also find great prices on one-way and round-trip tickets in June.

Search for affordable Delta Air Lines flights from Lambert-St. Louis Intl. Airport (STL) to Harry Reid Intl. Airport (LAS) one to three months before your departure. Travelers who book domestic flights 34 to 86 days in advance can save 25% compared to those who book just 6 to 12 days ahead. Regardless of fare class and itinerary, the best day of the week to book a domestic flight is usually Sunday and the most expensive day is typically Monday. Passengers who book on a Sunday can save 6% on average compared to those who book their travel on a Monday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC’s global airline sales database.

Click on the “Nonstop” filter when searching for direct Delta Air Lines flights from STL to LAS. You can also compare other carriers offering the same direct trip.

Filter your results by “Morning” and “Early Morning” to see the earliest flights from STL to LAS. Jetting off early means you’re less likely to experience cancellations.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.

Delta Air Lines flights from Lambert-St. Louis Intl. Airport (STL) to Las Vegas touch down at Harry Reid Intl. Airport (LAS). This is the main gateway to this city.

Offering a rewarding loyalty program and an excellent in-flight experience, Delta Air Lines is a top choice for many travelers flying from STL to LAS. Plus, if you’re a Delta SkyMiles and One Key™ member booking through Expedia, you could earn OneKeyCash™* on eligible flights on top of your airline miles, which can be put toward future travel purchases.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Depending on the type of fare you purchased, a fee generally applies if you cancel or change your booking more than 24 hours after confirmation. To find flexible plane tickets, select our “Changes included” or “No cancel fee” filter when looking for flights. To learn more about changing or canceling your reservation, head to “Trips,” select your flight and click on “Manage Booking.”