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C$183 Cheap Flights from St Louis (STL) to Cancun (CUN)

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Flight deals from St Louis Airport to Cancun Airport

Looking for a cheap last-minute deal or the best return flight from St Louis Airport to Cancun Airport? If you want to travel next month, return fares start from C$442. Find the lowest prices on one-way and return tickets right here.
Cancun.C$183 per passenger.Departing Fri., May 15.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from St Louis on Fri., May 15, arriving in Cancun.Price includes taxes and charges.From C$183, select.
Cancun.C$200 per passenger.Departing Wed., May 13.One-way flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from St Louis on Wed., May 13, arriving in Cancun.Price includes taxes and charges.From C$200, select.
Cancun.C$243 per passenger.Departing Mon., Apr. 13.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from St Louis on Mon., Apr. 13, arriving in Cancun.Price includes taxes and charges.From C$243, select.
Cancun.C$246 per passenger.Departing Tue., Aug. 11.One-way flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from St Louis on Tue., Aug. 11, arriving in Cancun.Price includes taxes and charges.From C$246, select.
Cancun.C$264 per passenger.Departing Fri., Jun. 5.One-way flight with Air Canada.Outbound indirect flight with Air Canada, departs from St Louis on Fri., Jun. 5, arriving in Cancun.Price includes taxes and charges.From C$264, select.
Cancun.C$266 per passenger.Departing Thu., Jul. 2.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from St Louis on Thu., Jul. 2, arriving in Cancun.Price includes taxes and charges.From C$266, select.
Cancun.C$310 per passenger.Departing Wed., Jul. 15.One-way flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from St Louis on Wed., Jul. 15, arriving in Cancun.Price includes taxes and charges.From C$310, select.
Cancun.C$325 per passenger.Departing Wed., Sep. 16.One-way flight with Delta.Outbound indirect flight with Delta, departs from St Louis on Wed., Sep. 16, arriving in Cancun.Price includes taxes and charges.From C$325, select.
Cancun.C$335 per passenger.Departing Fri., Jun. 5.One-way flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from St Louis on Fri., Jun. 5, arriving in Cancun.Price includes taxes and charges.From C$335, select.
Cancun.C$356 per passenger.Departing Tue., Oct. 6.One-way flight with Air Canada.Outbound indirect flight with Air Canada, departs from St Louis on Tue., Oct. 6, arriving in Cancun.Price includes taxes and charges.From C$356, select.
Cancun.C$394 per passenger.Departing Mon., Apr. 13.One-way flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from St Louis on Mon., Apr. 13, arriving in Cancun.Price includes taxes and charges.From C$394, select.
Cancun.C$403 per passenger.Departing Tue., Oct. 6.One-way flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from St Louis on Tue., Oct. 6, arriving in Cancun.Price includes taxes and charges.From C$403, select.
Cancun.C$445 per passenger.Departing Sat., Sep. 26.One-way flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from St Louis on Sat., Sep. 26, arriving in Cancun.Price includes taxes and charges.From C$445, select.

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 May.
Apr.
from C$243
May
from C$183
Jun.
from C$264
Jul.
from C$266
Aug.
from C$246
Sep.
from C$325
Oct.
from C$356
Nov.
Find prices
Dec.
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Jan.
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Feb.
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Mar.
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Which airlines fly 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.

Cancun

14km from central Cancun
ClosestCheapest
from C$183
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St Louis to Cancun: Flight information

The things to know before you go.
Cheapest flight foundC$183
Cheapest month to flyMay
Average flight time3 hrs, 11 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 C$442. 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 11 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 April 2026, there are 18 flights per week flying from St Louis to Cancun.
The cheapest month to fly from St Louis to Cancun is usually May.
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 Friday, May 15, 2026.
Yes – the average flight time is 3 hours and 11 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, Frontier Airlines and Southwest Airlines offer the cheapest flight tickets to Cancun.

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

  • A direct flight from Lambert-St. Louis International Airport to Cancun International Airport takes 3 hours 13 minutes (on average). Cancun's timezone is UTC-5 — the same as St Louis.

  • There are 13 flights from Lambert-St. Louis International Airport to Cancun International Airport weekly. Catch the 07:15 flight if you want to set off as early as possible. If you'd prefer to get the most out of your day, the last flight from STL to CUN departs at 16:30.

  • Traveling during a peak time like July? Major public holidays and other high seasons can lead to longer queues and delays at security. Play things extra safe and get there up to four hours ahead of international flights and two hours before domestic departures.

  • Frontier Airlines is your gateway to discovering Cancun (and maybe even some other great parts of Mexico!). Browse the direct flights from Lambert-St. Louis International Airport to Cancun International Airport offered by this airline.

  • If you want to break up your flight from Lambert-St. Louis International Airport to Cancun International Airport, add a stopover to your trip. Simply uncheck 'Direct flights only' to find a destination that catches your eye. The top stopovers on the STL - CUN route are:

    • Hartsfield-Jackson Atlanta International Airport

    • William P. Hobby Airport

    • George Bush Intercontinental Airport

  • Before reserving your cheap ticket from STL to CUN, check if you need a visa to enter Mexico. Travel document and visa requirements may differ and are updated frequently. For the most up-to-date information, contact the nearest consulate or embassy of your destination.

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

  • The best price we've found for a one-way ticket from Lambert-St. Louis International Airport to Cancun International Airport is C$183. The cheapest price for a return flight is C$442. Bear in mind that fares could change due to availability when booking.

  • Book 9 months before you want to travel. After looking at the numbers on our calendar, this is how far you'll want to book ahead to secure cheap flight tickets from STL to CUN.

  • Organize your trip for May. That's the cheapest month for flight tickets from Lambert-St. Louis International Airport to Cancun International Airport. If you're flexible with your travel dates, try out the 'Whole month' tool to find the lowest price across each month.

  • Log into your online account or use the app to create a Price Alert. You'll be notified straight away if there's a better deal on this route. It's easy to do, and it'll save you from searching for cheap flight tickets from STL to CUN every day.

  • Take advantage of filters to find the perfect trip for you. To see the 'Fastest,' 'Cheapest' or 'Best' flights from Lambert-St. Louis International Airport to Cancun International Airport, use the 'Sort by' function. You can also filter by airline, arrival and departure times, and journey duration.

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

  • The journey from central St Louis to Lambert-St. Louis International Airport takes about 36 minutes on public transport. If you ride-share, drive or get a cab, you'll cover the 26 kilometres in 21 minutes or so, depending on traffic conditions.

  • Need a convenient hotel near STL? If you've booked an early flight from Lambert-St. Louis International Airport to Cancun International Airport, these stays will have you moments from your departure gate:

Arriving at Cancun International Airport (CUN)

Getting from Cancun International Airport (CUN) to central Cancun

  • Cancun International Airport is approximately 19 kilometres from central Cancun. With your own car rental or if you take a cab, the drive is about 26 minutes.

When to fly to Cancun International Airport (CUN)

  • It's time to work out your travel dates for your flight from Lambert-St. Louis International Airport to Cancun International Airport. July is the busiest month to visit Cancun. If you prefer a more peaceful vibe, go in May.

  • Lock in your flight from Lambert-St. Louis International Airport to Cancun International Airport for August if you want to visit Cancun during its warmest month. Expect temperatures of between 26ºC and 32ºC.

  • Look for cheap flight tickets from STL to CUN in January if you like traveling in cooler conditions. Temperatures are at their lowest then, ranging between 20ºC and 27ºC on average.

More about Cancun

  • If you're looking for somewhere to rest your head, you'll find the most popular stays in Cancun right here. Browse these options after you've booked your flight from STL to CUN:

  • Every great adventure has to include some sightseeing. Playa Delfines, El Rey Ruins and Dubai Palace Casino are must-do's during your Cancun adventure.

Complete your Cancun trip with hotels and a car rental

  • Comparing flights is not our only party trick. Once you've booked your cheap ticket to Cancun International Airport, check out our great car rental offers that'll give you the freedom to travel around at your own pace. Next, take a look at our exclusive rates for hotels to find your ideal Cancun stay.

Plan the rest of your trip from St Louis to Cancun

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