Cheap Flights from St. Louis (STL) to Cancun (CUN)

View AU$255 flight on Mon, 15 Sep. 2025Opens in a new window

Popular airlines from Lambert-St. Louis International Airport (STL) to Cancun Intl. Airport (CUN)

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Cheap Flights from St. Louis (STL) to Cancun (CUN)

Prices were available within the past 7 days for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

Find the cheapest month to fly from St. Louis (STL) to Cancun (CUN)

October is typically the cheapest month to fly

From AU$334 - AU$719 per traveller.

Graph displaying average flight prices per month

Flight from St. Louis to Cancun route information
Origin airport
Lambert-St. Louis Intl.
Destination airport
Cancun Intl.
Distance
1984 km
Average flight time
3 hours 12 mins

Your quick guide to flights from St. Louis to Cancun

Pick up great flights from St. Louis to Cancun

With Expedia, you have your pick of 1 flights a day with 10 airlines covering flights from St. Louis to Cancun. Whether you’re on a business trip, a family holiday or a luxury break, just enter your travel dates, hit search then check out your choice of flights. Select from return, one way or multi-city flights, and use the advance search tool if you want a direct or refundable flight. You can narrow your search to show you just your preferred cabin class and airline, too. It’s all easy. You can book direct flights from St. Louis to Cancun that take around 3 hours.

Find cheap flights from St. Louis to Cancun

From the great flight deals with prices currently ranging from to , you can choose to see the cheapest flights first. Generally, you can book the cheapest flights from St. Louis to Cancun around 4 to 6 weeks in advance. If your travel dates are flexible, try to avoid weekends and peak seasons – when you are more likely to grab the lowest prices. Even last minute, there are some impressive deals. The cheapest time to fly to Cancun is normally in .

Reasons to book your flight from St. Louis to Cancun with Expedia

Expedia makes it easy to find, book, and travel, with everything you need all in one place. When you enter your travel details, find fantastic deals just for you on flight tickets from St. Louis to Cancun across all the main airline carriers, so you can save time, dollars, and hassle finding the perfect flight. If you think your plans could change, choose refundable flights so any changes won’t cost you more. Book your flight to Cancun right now and, if you join Expedia Rewards, you earn points this time and every time you travel with Expedia.

Frequently asked questions

How much is a flight from STL to Cancun Intl. Airport (CUN)?
Based on airfares available within the last 7 days on Expedia for flights departing within the next year, round-trip flights between Lambert-St. Louis Intl. Airport (STL) and Cancun Intl. Airport (CUN) start from . Make your booking today to secure the best price for your adventure. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from St. Louis Lambert International Airport to CUN?
Each airline has its own set of terms and conditions. If you decide to cancel your escape, visit our Customer Service Portal.
How do I find cheap flights from STL to CUN that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for Lambert Field to Cancun Airport flights, you'll see a "no change fees" filter for you to select.
How far is the flight from Lambert Field to Cancun Airport?
The flight distance between Lambert-St. Louis Intl. Airport (STL) and CUN is 2 000 kilometres. Bring along a drink, a few snacks and a few good podcasts. Keep yourself occupied and the hours will zip by.
Which airlines fly direct from STL to Cancun Airport?
With 30 flights every month from Lambert-St. Louis Intl. Airport (STL) to Cancun Airport, Southwest Airlines (WN) is a terrific choice. Offering 30 flights a month on this route, Frontier Airlines (F9) is another top pick.
Are Lambert-St. Louis Intl. Airport (STL) to Cancun Intl. Airport (CUN) flight tickets cheaper when they're purchased at the last minute?
Last-minute bookings from Lambert Field to Cancun Intl. Airport (CUN) can be hit-or-miss. You may be able to find a bargain, but you could also miss out completely! If you'd prefer to play it safe and start planning your trip early on, Expedia compares flight deals up to 12 months in advance. Just keep in mind that not all airlines publish their prices so far in advance. Our advice? Check back often as updates are made regularly.

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