$104 Cheap Flights from St. Louis to Cancun

For information on any current Cancun Intl. Airport (CUN) quarantine requirements and travel advice, go to the Covid-19 Travel Advisor. Check before you book your flight, so you don’t get caught up.

If you’re hoping to journey from St. Louis Lambert International Airport to CUN as speedily as possible, you’ll be glad to know multiple airlines offer nonstop flights. Choose your preferred seat with Frontier Airlines or Southwest Airlines.

For more info about changing your flight to CUN, please visit our Customer Service Portal.

If you’re traveling from St. Louis to Cancun, you can expect the journey to take approximately 5 hours and 33 minutes. If this sounds like more time than you had hoped, why not make the most of it? Read about where you’re going, work on your itinerary and get as much shut-eye as possible before the adventure starts.

With a flight distance of 1,250 mi separating Lambert Field and Cancun Airport, you’ll be in your seat for a decent amount of time. It’s a great chance to watch a movie or two, catch up on work or just sit back with a book.

You can choose from several airlines that have direct flights between St. Louis and Cancun. Frontier Airlines (F9) is one of the most liked. This carrier operates roughly 17 flights each month. Another popular choice is Southwest Airlines (WN), which offers 8 flights each month. The more airlines you consider, the more likely you are to score a great deal.

From the moment you enter the departure terminal to when you leave the arrivals terminal, if you’re flying with Volaris, VivaAerobus or United Airlines you can be sure that COVID-19 measures and social distancing rules have been adhered to. Many airlines have introduced capped capacity flights and keeping the middle seat empty.

This just in! Airfares offered on Thursdays tend to be the cheapest, according to flight demand on Travelocity in 2021. Tuesday and Wednesday prices are also good, but you may want to prepare your budget if booking during the weekend, as data shows that is when prices are generally at their highest.

Frequent travelers may already know this, but earlier in the week can be the cheapest time to fly. In 2021, flights departing on a Monday were generally the cheapest of the week, whereas you may pay a premium for weekend flights when demand is usually high. On average, tickets were most expensive for Saturday departures, so if you need to fly out on a weekend, you might look for deals ahead of time.

Trying to figure out how early you should book your flight? It’s possible to start comparing international airfares on Travelocity up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2021 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 0-2 weeks prior to their travel dates.*According to flight demand on Travelocity.com from January to December 2021. Savings are subject to change based on departure location, date and destination.