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£178 Cheap Flights from St. Louis (STL) to Cancun (CUN)

View £178 flight on Sun, 6 Sept 2026Opens 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 and start at £178 for one-way flights and £332 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Aeromexico
Sun, 30 Aug - Wed, 16 Sept
STL
St. Louis
CUN
Cancun
£332 Return, found 5 days ago
£332
Return
found 5 days ago
Select Aeromexico flight, departing Sun, 30 Aug from St. Louis to Cancun, returning Wed, 16 Sept, priced at £332 found 5 days ago
Aeromexico
Tue, 1 Sept - Wed, 16 Sept
STL
St. Louis
CUN
Cancun
£340 Return, found 5 days ago
£340
Return
found 5 days ago
Select Aeromexico flight, departing Tue, 1 Sept from St. Louis to Cancun, returning Wed, 16 Sept, priced at £340 found 5 days ago
Aeromexico
Sun, 13 Sept - Wed, 30 Sept
STL
St. Louis
CUN
Cancun
£341 Return, found 5 days ago
£341
Return
found 5 days ago
Select Aeromexico flight, departing Sun, 13 Sept from St. Louis to Cancun, returning Wed, 30 Sept, priced at £341 found 5 days ago
Aeromexico
Mon, 14 Sept - Wed, 30 Sept
STL
St. Louis
CUN
Cancun
£344 Return, found 5 days ago
£344
Return
found 5 days ago
Select Aeromexico flight, departing Mon, 14 Sept from St. Louis to Cancun, returning Wed, 30 Sept, priced at £344 found 5 days ago
Aeromexico
Sun, 20 Sept - Tue, 6 Oct
STL
St. Louis
CUN
Cancun
£345 Return, found 5 days ago
£345
Return
found 5 days ago
Select Aeromexico flight, departing Sun, 20 Sept from St. Louis to Cancun, returning Tue, 6 Oct, priced at £345 found 5 days ago
Aeromexico
Mon, 7 Sept - Tue, 22 Sept
STL
St. Louis
CUN
Cancun
£353 Return, found 5 days ago
£353
Return
found 5 days ago
Select Aeromexico flight, departing Mon, 7 Sept from St. Louis to Cancun, returning Tue, 22 Sept, priced at £353 found 5 days ago
Delta
Fri, 21 Aug - Wed, 2 Sept
STL
St. Louis
CUN
Cancun
£365 Return, found 5 days ago
£365
Return
found 5 days ago
Select Delta flight, departing Fri, 21 Aug from St. Louis to Cancun, returning Wed, 2 Sept, priced at £365 found 5 days ago
Air Canada
Fri, 25 Sept - Mon, 5 Oct
STL
St. Louis
CUN
Cancun
£372 Return, found 5 days ago
£372
Return
found 5 days ago
Select Air Canada flight, departing Fri, 25 Sept from St. Louis to Cancun, returning Mon, 5 Oct, priced at £372 found 5 days ago
American Airlines
Sun, 23 Aug - Wed, 9 Sept
STL
St. Louis
CUN
Cancun
£399 Return, found 5 days ago
£399
Return
found 5 days ago
Select American Airlines flight, departing Sun, 23 Aug from St. Louis to Cancun, returning Wed, 9 Sept, priced at £399 found 5 days ago
United
Wed, 12 Aug - Fri, 28 Aug
STL
St. Louis
CUN
Cancun
£496 Return, found 5 days ago
£496
Return
found 5 days ago
Select United flight, departing Wed, 12 Aug from St. Louis to Cancun, returning Fri, 28 Aug, priced at £496 found 5 days ago

Alternative airports near Cancun

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Cancun Intl. CUN. Cheapest and Closest option available. Average driving time to city centre is 18 minutes. Flights from £449
CUN
Cancun Intl.
CheapestClosest
Average driving time to city centre18 min
Flights from £449

Frequently asked questions

How much does a flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Cancun, Quintana Roo (CUN-Cancun Intl.) cost?
You can find one-way and return flights from STL to CUN with Expedia. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see our cheapest fares first, and use the Price Tracking tool to receive alerts when STL to CUN ticket fares go up or down.
What is the cheapest month to fly from St. Louis, MO (STL) to Cancun, Quintana Roo (CUN)?
The cheapest months to fly from St. Louis, MO (STL) to Cancun, Quintana Roo (CUN) are typically during off-peak season when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you are able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from St. Louis, MO (STL) to Cancun, Quintana Roo (CUN)?
Enter STL to CUN and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Cancun, Quintana Roo (CUN-Cancun Intl.)?
Frontier Airlines is one of the cheapest airlines offering nonstop return flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Cancun, Quintana Roo (CUN-Cancun Intl.), with tickets starting from around £132 for flights that can be booked for departure within the next year. Spirit Airlines offers one of the cheapest connecting return flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Cancun, Quintana Roo (CUN-Cancun Intl.), with tickets starting from around £472. These prices are per adult for economy/coach class. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.
How do I find cheap flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Cancun, Quintana Roo (CUN-Cancun Intl.)?
To find a cheap flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Cancun, Quintana Roo (CUN-Cancun Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best airline to fly with from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Cancun, Quintana Roo (CUN-Cancun Intl.)?
The best airline to fly with from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Cancun, Quintana Roo (CUN-Cancun Intl.) will differ from traveller to traveller. If you like to fly early, Southwest Airlines offers early morning flights. If price is the most important factor, Frontier Airlines typically offers the lowest fares. Delta offers the most daily flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Cancun, Quintana Roo (CUN-Cancun Intl.), which is great if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
What is the best time to fly from St. Louis, MO (STL) to Cancun, Quintana Roo (CUN)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Cancun, Quintana Roo (CUN-Cancun Intl.)?
You'll find around 2 nonstop flights per day from St. Louis Lambert International Airport (STL) to Cancun International Airport (CUN). For even more choices, look at flights that include layovers, as there are approximately 107 connecting flights per day. Some common connection points include O'Hare International Airport (ORD), Dallas-Fort Worth International Airport (DFW), and Hartsfield-Jackson Atlanta International Airport (ATL).
What is the earliest flight from St. Louis, MO (STL) to Cancun, Quintana Roo (CUN)?
Sort flights by "Departure (earliest)" on Expedia to find the earliest flight from St. Louis, MO (STL) to Cancun, Quintana Roo (CUN). To compare more early flights, use the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Cancun, Quintana Roo (CUN-Cancun Intl.)?
You'll typically find the most flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Cancun, Quintana Roo (CUN-Cancun Intl.) on a Friday, with around 53 flights available. This gives you a good selection of options for your travel plans. Major airlines on this route include Southwest Airlines, Delta, and United. Flight options are fairly consistent throughout the week, with Fridays offering only slightly more flights than other days.
What are the most popular departure times for flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Cancun, Quintana Roo (CUN-Cancun Intl.)?
The most popular departure times for flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Cancun, Quintana Roo (CUN-Cancun Intl.) are in the early morning, between 6am and 9am. Many major carriers, including American Airlines, Delta and Frontier Airlines, offer flights during this window. Many travellers prefer this time as it allows for an early arrival in Cancun, giving you more time to enjoy your destination.
How long does it take to fly from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Cancun, Quintana Roo (CUN-Cancun Intl.)?
A nonstop flight from STL to CUN typically takes around 3 hours 20 minutes, covering approximately 1,997 kilometers. Connecting flights on this route usually add 3 hours 10 minutes to your travel time. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Cancun, Quintana Roo (CUN-Cancun Intl.)?
Yes, you can fly business class or first class between STL and CUN. Airlines that offer business class service on this route include:
  • Frontier Airlines
  • Air Canada
  • American Airlines
  • United
  • Delta
First class cabins are available on Alaska Airlines.
How do I earn miles on a St. Louis, MO (STL) to Cancun, Quintana Roo (CUN) flight with Expedia?
It's easy to earn miles on a St. Louis, MO (STL) to Cancun, Quintana Roo (CUN) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
Is it cheaper to buy a plane ticket from St. Louis, MO (STL) to Cancun, Quintana Roo (CUN) at the last minute?
Typically, booking a last minute flight from St. Louis, MO (STL) to Cancun, Quintana Roo (CUN) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a St. Louis, MO (STL) to Cancun, Quintana Roo (CUN) flight and hotel package?
Securing a St. Louis, MO (STL) to Cancun, Quintana Roo (CUN) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Cancun, Quintana Roo (CUN-Cancun Intl.)?
If you booked your St. Louis, MO (STL-Lambert-St. Louis Intl.) to Cancun, Quintana Roo (CUN-Cancun Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Cancun Intl.
Airlines serving
Aeromexico, Air Canada, Alaska Airlines
Return price
£331
Distance
1984 km
Average flight time
3 hours 10 mins

Book with confidence

Compare flights from St. Louis to Cancun easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from St. Louis to Cancun. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to Cancun Intl. in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Lambert-St. Louis Intl. to Cancun Intl..  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from Lambert-St. Louis Intl. (STL) to Cancun Intl. (CUN)

The easiest way to view the best deals on flights from St. Louis to Cancun today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Lambert-St. Louis Intl. to Cancun Intl. start at just £332 and range up to £496.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near St. Louis and Cancun
  • booking your flight during August, the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your St. Louis to Cancun flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Lambert-St. Louis Intl. to Cancun Intl. for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Compare flights from St. Louis to Cancun easily and book with confidence

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*Available to Expedia members.