Cheap Flights from St Louis to Cancun

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Compare St Louis to Cancun flight deals

Find the cheapest month or even day of the year to fly to Cancun

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Flight deals from St Louis to Cancun

Looking for a cheap last-minute deal or the best return flight from St Louis to Cancun? Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from St Louis to Cancun

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like St Louis to Cancun flights are currently cheapest in July.

Direct flights from St Louis to Cancun

St Louis to Cancun: Alternative routes

Compare routes from St Louis to Cancun below. You may find an airport to fly into that's cheaper, faster, or easier than Cancun.

St Louis to Cancun: Flight information

The things to know before you go.
Cheapest flight foundر.ق.‏ 480
Cheapest month to flyJuly
Average flight time3 hrs, 12 mins
Most popular airlineSouthwest Airlines
Average flights per week18

Finding cheap flights from St Louis to Cancun: Frequently asked questions

The best price we found for a return flight from St Louis to Cancun is ر.ق.‏ 1,142. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
3 hours and 12 minutes is the average flight time from St Louis to Cancun.
Southwest Airlines, Frontier Airlines and Volaris fly direct from St Louis to Cancun.
As of May 2025, there are 19 flights per week flying from St Louis to Cancun.
The cheapest month to fly from St Louis to Cancun is usually May 2025.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from St Louis Airport to Cancun Airport on Thursday, 12 June 2025.
Yes – the average flight time is 3 hours and 12 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Cancun but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Cancun is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Spirit Airlines and Frontier Airlines offer the cheapest flight tickets to Cancun.

Travelling from Lambert-St. Louis International Airport (STL) to Cancun International Airport (CUN): what you need to know

  • Around 3 hours 15 minutes is how long you can expect to be travelling on a direct flight from Lambert-St. Louis International Airport to Cancun International Airport.

  • St Louis and Cancun are in the same timezone, UTC-5.

  • Flights from STL to CUN start from 07:15 — the earliest with Southwest Airlines. The last departure is at 13:15 with Southwest Airlines. Overall, there are 13 weekly Lambert-St. Louis International Airport to Cancun International Airport flights.

  • Give yourself plenty of time to make your STL to CUN flight. As a general rule, turn up two hours before international departures and an hour ahead for domestic flights.

  • Travelling during a peak time such as July? Major public holidays and other popular periods can lead to longer lines and delays at security. Be extra cautious and arrive up to four hours before international flights and two hours before domestic departures.

  • A range of airlines operate direct flights from Lambert-St. Louis International Airport to Cancun International Airport, so jetting off to Cancun (and then seeing more parts of Mexico!) is easy. Top carriers that fly nonstop include:

  • Most travellers choose to fly with American Airlines on this route.

  • The most punctual carrier operating STL to CUN flights is Frontier Airlines. Its services land as scheduled 78.33% of the time.

  • Think about adding a stopover when booking your ticket from Lambert-St. Louis International Airport to Cancun International Airport. Just deselect 'Direct flights only' to break up your trip, or visit a new city along the way. Here are some options between STL and CUN:

    • William P. Hobby Airport

    • Hartsfield-Jackson Atlanta International Airport

    • George Bush Intercontinental Airport

How to find the cheapest flights from Lambert-St. Louis International Airport (STL) to Cancun International Airport (CUN)

  • At the moment, ر.ق.‏ 480 is the cheapest price we've seen for a one-way Lambert-St. Louis International Airport to Cancun International Airport flight. The best price for a return plane ticket is ر.ق.‏ 1,142. Bear in mind that fares may change due to availability at the time of booking.

  • Score cheap tickets from STL to CUN by booking at least six months ahead. According to our research, that's the sweet spot for finding the biggest deals.

  • Schedule your trip for May. That's the cheapest month for flights from Lambert-St. Louis International Airport to Cancun International Airport. If you're flexible on when you fly, try out the 'Whole month' tool to see the cheapest price across each month.

  • Spend less time searching for cheap flights from STL to CUN by setting up a Price Alert. You'll receive an email or notification through the app when a lower fare pops up.

  • Tailor your flights with filters. Choose your departure and arrival times, total journey duration and airlines. You can also sort the results by 'Fastest,' 'Cheapest' or 'Best' flights from Lambert-St. Louis International Airport to Cancun International Airport.

Handy information about Lambert-St. Louis International Airport (STL)

Arriving at Cancun International Airport (CUN)

  • Consider booking a hotel close to CUN if you're catching a late Lambert-St. Louis International Airport to Cancun International Airport flight. Check in to one of these options and make your arrival easier:

  • Hit the road running by picking up a Cancun International Airport rental car. Grab a set of wheels from MEX, America or Europcar and explore beyond Cancun's usual tourist stops.

  • Booking your ride from Cancun International Airport around three weeks in advance increases your chances of getting a good deal.

Getting from Cancun International Airport (CUN) to central Cancun

  • Cancun International Airport to the centre of Cancun has a drive time of around 25 minutes. It's approximately 19 kilometres away.

When to fly to Cancun International Airport (CUN)

  • It's time to choose your dates for your flight from Lambert-St. Louis International Airport to Cancun International Airport. July is the most popular month to head to Cancun. If you like a more low-key vibe, go in May.

  • When reserving your flight from Lambert-St. Louis International Airport to Cancun International Airport, think about the type of weather you enjoy. August is the warmest month in Cancun, with the temperature ranging from 26ºC to 32ºC.

  • January sees average temperatures of between 20ºC and 27ºC. Look for cheap tickets from STL to CUN sometime around then if you'd rather travel in cooler conditions.

Explore more of Mexico

  • Cancun has its own special appeal, but there are so many other corners of Mexico waiting to be discovered. Around 290 kilometres west of Cancun, a trip to Merida will fill your itinerary to the brim. Check out popular attractions like P. ANDADOR NVA. CHICHEN ITZA, Pre Hispanic Town Of Uxmal and El Palacio de Gobierno.

  • Campeche is another must-experience destination in Mexico and is around 418 kilometres west of Cancun. No trip is complete without visiting Campeche Waterfront Promenade, Zona Arquelogica Edzna and Centro Historico de San Francisco de Campeche.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.