$94 Cheap Frontier Airlines flights St. Louis (STL) to Salt Lake City (SLC)

Apply the “Price (lowest to highest)” filter on Expedia to search for cheap Frontier Airlines round-trip flights from $198 from STL to SLC. Affordable one-way fares from $94 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.

November is one of the least expensive months to jet away to Salt Lake City with Frontier Airlines. You could also find great prices on one-way and return tickets in January.

For cheap Frontier Airlines fares from Lambert-St. Louis Intl. Airport (STL) to Salt Lake City Intl. Airport (SLC), start searching one to three months before your intended departure. Securing domestic flights 34 to 86 days in advance could save you 25% compared to booking just 6 to 12 days ahead. The day you book can also impact the overall price. Sunday is usually the most affordable, while Monday is often the most expensive for domestic flights. You can save 6% on average by booking on a Sunday.**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 browsing for direct Frontier Airlines flights from STL to SLC. It’s also a good way to compare other carriers servicing the same nonstop route.

Sort your results by “Early Morning” and “Morning” to see the earliest flights from STL to SLC. Taking 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.

Take a Frontier Airlines flight from Lambert-St. Louis Intl. Airport (STL) to Salt Lake City, and you’ll most likely touch down at Salt Lake City Intl. Airport (SLC). This is the airline’s primary hub in this destination.

Offering a rewarding loyalty program, Frontier Airlines is a favorite of many travelers heading from STL to SLC. Plus, if you’re a Frontier Miles and One Key™ member booking through Expedia, you can earn OneKeyCash™* on eligible flights on top of your airline miles.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

In most cases, you can modify or cancel your flight, although additional charges may apply if your booking was made more than 24 hours ago. Need to keep your options open? Use our “Changes included” or “No cancel fee” filter to find flights that won’t charge extra if you need to adjust your plans. To update your booking, visit “Trips,” select your flight and click on “Manage Booking” for more details.