$61 Cheap Frontier Airlines flights St. Louis (STL) to Las Vegas (LAS)

Set the “Price (lowest to highest)” filter on Expedia to look for cheap Frontier Airlines return flights from $122 from STL to LAS. Affordable one-way fares from $61 are also available.**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.

Browse for return or one-way flights to Las Vegas in January or June. You could find a cheap fare with Frontier Airlines during these off-peak times.

Look for cheap Frontier Airlines flights from Lambert-St. Louis Intl. Airport (STL) to Harry Reid Intl. Airport (LAS) one to three months before your day of 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. No matter the fare type and journey, the best day to book a domestic flight is generally Sunday and the most expensive day tends to be 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.

Jet off on one of Frontier Airlines’s 4 direct weekly flights from Lambert-St. Louis Intl. Airport (STL) to Harry Reid Intl. Airport (LAS). To see what’s available, enter your destination, origin and dates and hit search. Then select the “Nonstop” and “Airline” filters.

On average, it takes 3h 49m to travel nonstop from Lambert-St. Louis Intl. Airport (STL) to Harry Reid Intl. Airport (LAS) with Frontier Airlines.

Departing STL at 8:31PM UTC-6, the earliest Frontier Airlines flight to LAS lands at 10:20PM UTC-8. Traveling early means you’re less likely to encounter delays or cancellations.* Don’t like early starts? The last Frontier Airlines flight from STL to LAS departs at 8:31PM UTC-6 and touches down at 10:20PM UTC-8.*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.

Frontier Airlines flights from Lambert-St. Louis Intl. Airport (STL) to Las Vegas land at Harry Reid Intl. Airport (LAS). This is the main entry point to this city.

A rewarding loyalty program and the ability to collect points through Frontier Miles are the start of the reasons to jet off from STL to LAS with Frontier Airlines. Plus, by joining Expedia’s free One Key™ program, you can receive OneKeyCash™* in addition to any airline loyalty program earnings. It’s yours to use wherever your next trip takes you.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

You’ll likely board an Airbus A321neo or an Airbus A321 when flying Frontier Airlines from Lambert-St. Louis Intl. Airport (STL) to Harry Reid Intl. Airport (LAS). However, keep in mind that a different plane could be assigned to your route depending on operational reasons.

You can usually change or cancel your flight, although there may be additional charges if you booked more than 24 hours ago. Need to keep your options open? Make use of our “Changes included” or “No cancel fee” filter to find flights that won’t charge you extra if you have to revise your plans. To make modifications, visit “Trips,” select your flight and click on “Manage Booking” for more information.