$170 Cheap Frontier Airlines flights St. Louis (STL) to Cancun (CUN)

You’ll find affordable return Frontier Airlines flights from $326 from STL to CUN by organizing your results from “Price (lowest to highest)” on Expedia. Or look for bargains from $170 for a one-way journey.**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.

Search for one-way or return flights to Cancun in October or September. You could find an affordable fare with Frontier Airlines during these off-season months.

Check for Frontier Airlines flights from STL to CUN about one month before you want to go. The cheapest time to book an international flight is generally 18 to 29 days ahead of your travel date when you can save 17% versus booking four to five months in advance. Regardless of itinerary or ticket type, the best day of the week to book international airfare is usually Sunday. Friday is often the most expensive. Passengers who book on a Sunday can save an average of 17% compared to those who book on a Friday.**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.

Hop on one of Frontier Airlines’s 7 weekly direct flights from Lambert-St. Louis Intl. Airport (STL) to Cancun Intl. Airport (CUN). To see your options, enter your travel dates, origin and destination and hit search. Then select the “Nonstop” and “Airline” filters.

On average, it takes 3h 25m to travel nonstop from Lambert-St. Louis Intl. Airport (STL) to Cancun Intl. Airport (CUN) with Frontier Airlines.

The first Frontier Airlines flight from STL to CUN departs at 6:25AM UTC-6, arriving at 10:50AM UTC-5. If you’d like to set off later, the last Frontier Airlines flight leaves STL at 6:25AM UTC-6 and touches down at CUN at 10:50AM UTC-5. Flying earlier is generally a smart option as morning flights are 20% less likely to be canceled.**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 Cancun arrive at Cancun Intl. Airport (CUN). This is the main entry point here.

A rewarding loyalty program and the opportunity to collect points through Frontier Miles are the start of the reasons to fly from STL to CUN with Frontier Airlines. Plus, when you sign up to Expedia’s free One Key™ program, you can receive OneKeyCash™* on top of Frontier Airlines’s loyalty program earnings. It’s yours to spend on future travel plans.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Frontier Airlines generally operates Airbus A321neo planes for flights from Lambert-St. Louis Intl. Airport (STL) to Cancun Intl. Airport (CUN). Keep in mind that aircraft type can vary depending on operational demands, so the plane you board might be different on your day of travel.

You can usually cancel or change your flight, although additional fees may apply if your booking was made over 24 hours ago. Need to keep your options open? Apply the “No cancel fee” and “Changes included” filters to find flights that won’t charge you extra if you need to revise your plans. To modify your booking, visit “Trips,” select your flight and click on “Manage Booking” for more details.