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

Apply the “Price (lowest to highest)” filter on Expedia to find cheap Frontier Airlines return flights from $128 from LAS to STL. Affordable one-way tickets from $61 are also on offer.**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 most affordable months to jet away to St. Louis with Frontier Airlines. You could also find great deals on return and one-way tickets in February.

Look for affordable Frontier Airlines flights from Harry Reid Intl. Airport (LAS) to Lambert-St. Louis Intl. Airport (STL) 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 usually Sunday and the most expensive 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.

Yes, you can travel from Harry Reid Intl. Airport (LAS) to Lambert-St. Louis Intl. Airport (STL) on any of Frontier Airlines’s 4 weekly direct flights. Apply Expedia’s “Nonstop” and “Airline” filters to find the Frontier Airlines flight that’ll take you to STL at your preferred time.

The journey time for a direct Frontier Airlines flight from Harry Reid Intl. Airport (LAS) to Lambert-St. Louis Intl. Airport (STL) takes approximately 3h 21m.

Setting off from LAS at 2:10PM UTC-8, the first Frontier Airlines flight to STL lands at 7:31PM UTC-6. Traveling earlier in the day means you’re less likely to experience delays.* Don’t like early starts? The last Frontier Airlines flight from LAS to STL departs at 2:10PM UTC-8 and touches down at 7:31PM UTC-6.*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.

Board a Frontier Airlines flight from Harry Reid Intl. Airport (LAS) to St. Louis, and you’ll probably arrive at Lambert-St. Louis Intl. Airport (STL). This is the airline’s primary hub in this destination.

Travel from LAS to STL with Frontier Airlines and enjoy a range of benefits including a rewarding loyalty program. When booking through Expedia as a Frontier Miles and One Key™ member, you may also earn OneKeyCash™* to spend on select future travel purchases.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

You’ll likely be seated on an Airbus A321neo or an Airbus A321 when flying Frontier Airlines from Harry Reid Intl. Airport (LAS) to Lambert-St. Louis Intl. Airport (STL). However, keep in mind that a different aircraft may be used depending on operational requirements.

Changes are generally free within 24 hours of booking, but your airline may add a charge after that time. For further details about altering your flights, go to your “Trips,” select your flight and click on “Manage Booking.” If you want the flexibility to change your plans without being charged, check the “No cancel fee” or “Changes included” filter when organizing your next adventure.