Cheap Flights from St Louis to Cancun from $719

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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 Airport to Cancun Airport? If you want to travel next month, return fares start from $719. Find the lowest prices on one-way and return tickets right here.

Cancun.$719 per passenger.Departing Wed, 22 Jul, returning Wed, 29 Jul.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from St Louis on Wed, 22 Jul, arriving in Cancun.Inbound indirect flight with Frontier Airlines, departs from Cancun on Wed, 29 Jul, arriving in St Louis.Price includes taxes and charges.From $719, select.

Cancun.$725 per passenger.Departing Tue, 28 Jul, returning Tue, 4 Aug.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from St Louis on Tue, 28 Jul, arriving in Cancun.Inbound indirect flight with Frontier Airlines, departs from Cancun on Tue, 4 Aug, arriving in St Louis.Price includes taxes and charges.From $725, select.

Cancun.$754 per passenger.Departing Tue, 11 Aug, returning Sun, 16 Aug.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from St Louis on Tue, 11 Aug, arriving in Cancun.Inbound indirect flight with Frontier Airlines, departs from Cancun on Sun, 16 Aug, arriving in St Louis.Price includes taxes and charges.From $754, select.

Cancun.$769 per passenger.Departing Mon, 30 Nov, returning Thu, 3 Dec.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from St Louis on Mon, 30 Nov, arriving in Cancun.Inbound direct flight with Southwest Airlines departs from Cancun on Thu, 3 Dec, arriving in St Louis.Price includes taxes and charges.From $769, select.

Cancun.$778 per passenger.Departing Fri, 14 Aug, returning Thu, 20 Aug.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from St Louis on Fri, 14 Aug, arriving in Cancun.Inbound direct flight with Southwest Airlines departs from Cancun on Thu, 20 Aug, arriving in St Louis.Price includes taxes and charges.From $778, select.

Cancun.$782 per passenger.Departing Mon, 13 Jul, returning Tue, 21 Jul.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from St Louis on Mon, 13 Jul, arriving in Cancun.Inbound direct flight with Southwest Airlines departs from Cancun on Tue, 21 Jul, arriving in St Louis.Price includes taxes and charges.From $782, select.

Cancun.$787 per passenger.Departing Fri, 31 Jul, returning Sat, 1 Aug.Return flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from St Louis on Fri, 31 Jul, arriving in Cancun.Inbound direct flight with Southwest Airlines departs from Cancun on Sat, 1 Aug, arriving in St Louis.Price includes taxes and charges.From $787, select.

Cancun.$788 per passenger.Departing Sun, 20 Sep, returning Wed, 30 Sep.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from St Louis on Sun, 20 Sep, arriving in Cancun.Inbound indirect flight with Southwest Airlines, departs from Cancun on Wed, 30 Sep, arriving in St Louis.Price includes taxes and charges.From $788, select.

Cancun.$795 per passenger.Departing Sun, 27 Sep, returning Thu, 1 Oct.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from St Louis on Sun, 27 Sep, arriving in Cancun.Inbound indirect flight with Southwest Airlines, departs from Cancun on Thu, 1 Oct, arriving in St Louis.Price includes taxes and charges.From $795, select.

Cancun.$810 per passenger.Departing Wed, 9 Dec, returning Wed, 13 Jan.Return flight with United.Outbound indirect flight with United, departs from St Louis on Wed, 9 Dec, arriving in Cancun.Inbound indirect flight with United, departs from Cancun on Wed, 13 Jan, arriving in St Louis.Price includes taxes and charges.From $810, select.

Cancun.$820 per passenger.Departing Mon, 4 Jan, returning Wed, 13 Jan.Return flight with United.Outbound indirect flight with United, departs from St Louis on Mon, 4 Jan, arriving in Cancun.Inbound indirect flight with United, departs from Cancun on Wed, 13 Jan, arriving in St Louis.Price includes taxes and charges.From $820, select.

Cancun.$820 per passenger.Departing Mon, 14 Dec, returning Fri, 25 Dec.Return flight with United.Outbound indirect flight with United, departs from St Louis on Mon, 14 Dec, arriving in Cancun.Inbound indirect flight with United, departs from Cancun on Fri, 25 Dec, arriving in St Louis.Price includes taxes and charges.From $820, select.

Cancun.$824 per passenger.Departing Tue, 16 Mar, returning Tue, 23 Mar.Return flight with United.Outbound indirect flight with United, departs from St Louis on Tue, 16 Mar, arriving in Cancun.Inbound indirect flight with United, departs from Cancun on Tue, 23 Mar, arriving in St Louis.Price includes taxes and charges.From $824, select.

Cancun.$824 per passenger.Departing Mon, 2 Nov, returning Fri, 13 Nov.Return flight with United.Outbound indirect flight with United, departs from St Louis on Mon, 2 Nov, arriving in Cancun.Inbound indirect flight with United, departs from Cancun on Fri, 13 Nov, arriving in St Louis.Price includes taxes and charges.From $824, select.

Cancun.$853 per passenger.Departing Sun, 18 Oct, returning Wed, 21 Oct.Return flight with Delta.Outbound indirect flight with Delta, departs from St Louis on Sun, 18 Oct, arriving in Cancun.Inbound indirect flight with Delta, departs from Cancun on Wed, 21 Oct, arriving in St Louis.Price includes taxes and charges.From $853, select.

Cancun.$885 per passenger.Departing Mon, 31 Aug, returning Fri, 4 Sep.Return flight with United.Outbound indirect flight with United, departs from St Louis on Mon, 31 Aug, arriving in Cancun.Inbound indirect flight with United, departs from Cancun on Fri, 4 Sep, arriving in St Louis.Price includes taxes and charges.From $885, 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 July.

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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.

Cancun

14km from central Cancun

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from $719

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St Louis to Cancun: Flight information

The things to know before you go.

Cheapest flight found	$719
Cheapest month to fly	July
Average flight time	3 hrs, 10 mins
Most popular airline	Southwest Airlines
Average flights per week	29

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

How much are return flights from St Louis to Cancun?

The best price we found for a return flight from St Louis to Cancun is $719. 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.

How long does it take to fly from St Louis to Cancun?

3 hours and 10 minutes is the average flight time from St Louis to Cancun.

Which airlines fly direct from St Louis to Cancun?

Southwest Airlines, Frontier Airlines and Volaris fly direct from St Louis to Cancun.

How many flights are there a week from St Louis to Cancun?

As of June 2026, there are 29 flights per week flying from St Louis to Cancun.

When is the cheapest time to fly from St Louis to Cancun?

The cheapest month to fly from St Louis to Cancun is usually July.

Which upcoming date is cheapest to fly from St Louis Airport to Cancun Airport on?

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 Wednesday, 22 July 2026.

Can I get a direct flight from St Louis Airport to Cancun Airport?

Yes – the average flight time is 3 hours and 10 minutes.

How can I find the best flight deal to Cancun?

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.

When is the best time to book flights to Cancun?

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.

Which is the cheapest airline to fly from St Louis Airport to Cancun with?

Currently, Frontier Airlines and Southwest Airlines offer the cheapest flight tickets to Cancun.

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

Take a direct flight from St Louis Airport to Cancun Airport and you'll be in the air for an average of 3 hours 10 minutes.
The timezone in Cancun is UTC-5, which is one hour ahead of St Louis.
Flights from STL to CUN start from 05:50 — the first with Southwest Airlines. The latest departure is at 12:35 with Southwest Airlines. In total, you can choose from eight weekly St Louis Airport to Cancun Airport flights.
To ensure you catch your STL to CUN flight, leave plenty of time for things like baggage drop and finding your gate. Arriving two hours ahead of international departures and an hour before domestic flights is the general rule.
You can expect longer lines in popular months such as July. Arriving up to four hours in advance for international flights and two hours for domestic departures will help ensure a smooth travel experience.
With direct flights from St Louis Airport to Cancun Airport operated by a number of airlines, flying to Cancun (and then other destinations in Mexico) is a breeze. You can fly nonstop with:
The airline that tops the list for bookings on this route is Southwest Airlines.
Southwest Airlines is the most punctual carrier that operates STL to CUN flights. An impressive 85.92% of its departures on this route arrive as scheduled.
Think about adding a stopover when booking your ticket from St Louis Airport to Cancun Airport. Simply deselect 'Direct flights only' to break up your journey, or perhaps explore a new destination along the way. Check out these options between STL and CUN:
- Atlanta Hartsfield-Jackson Airport
- Houston George Bush Intercntl. Airport
- Houston Hobby Airport

How to find the cheapest flights from St Louis Airport (STL) to Cancun Airport (CUN)

$346 is the best price for a one-way St Louis Airport to Cancun Airport flight. Return flights start at $719. These prices can change based on availability.
Don't leave everything to the last moment. You're more likely to get cheap tickets from STL to CUN if you book early. Airlines often have some amazing early bird discounts.
May is the cheapest month for flights from St Louis Airport to Cancun Airport. If you need to travel at a different time of year, the 'Whole month' tool will give you the lowest prices for each month.
You don't need to check every day to see if fares have gone down when you set up a Price Alert. We'll update you the moment there's a new deal on cheap flights from STL to CUN.
Choose your preferred departure and arrival times, number of stops and airlines with the filters. Alternatively, sort your results by 'Cheapest' to get the best deals on flights from St Louis Airport to Cancun Airport.

Handy information about St Louis Airport (STL)

STL is located at 10701 Lambert International Blvd..
76% of flights departing from St Louis Airport land at their destination on schedule.
To reach St Louis Airport from central St Louis, it takes around 25 minutes by car. This depends on traffic, however. It's approximately 24 kilometres from the airport to the city centre.
The journey on public transport takes about 30 minutes.
Get your journey off to a hassle-free start by staying near STL. Whether you're taking an early flight from St Louis Airport to Cancun Airport or want to avoid feeling rushed, these stays have you covered:

Arriving at Cancun Airport (CUN)

The last thing you need is a lengthy journey to your hotel if you're arriving on a late St Louis Airport to Cancun Airport flight. Book one of these accommodation options near CUN instead:
Travel at your own pace with a Cancun Airport rental car. Pick up your wheels from MEX, America or Europcar and discover more of Cancun and beyond.
Reserving your ride from Cancun Airport around three weeks in advance can help you get the lowest rate.

When to fly to Cancun Airport (CUN)

It's time to choose your trip dates for your flight from St Louis Airport to Cancun Airport. April is the busiest month to visit Cancun. If you prefer a more low-key vibe, go in March.
The warmest month in Cancun is August, with temperatures ranging between 26ºC and 32ºC. Lock in your flights from St Louis Airport to Cancun Airport in this month if this is the type of weather you enjoy.
If you like cooler conditions, search for a cheap ticket from STL to CUN in January. Average temperatures are between 20ºC and 27ºC then.

Explore more of Mexico

You've done Cancun, now it's time to discover more of Mexico. Journey about 290 kilometres west to Merida to tick off its must-visit sights. From Chichen Itza, cenotes y pueblos magicos to Chichen-itza Park and Nva. Chichen Itza Park, there's plenty to keep you on the go.
If you're looking to explore another corner of Mexico, head for Campeche, about 418 kilometres west of Cancun. Zona Arquelogica Edzna, Old City Wall and Plaza de la Independencia are among the biggest draws.