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CA $305 Cheap Flights from St. Louis (STL) to Cancun (CUN)

View CA $305 flight on Wed, Aug 5, 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 CA $305 for one-way flights and CA $625 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Aeromexico
Wed, Oct 7 - Wed, Oct 14
STL
St. Louis
CUN
Cancun
CA $625 Roundtrip, found 4 days ago
CA $625
Roundtrip
found 4 days ago
Select Aeromexico flight, departing Wed, Oct 7 from St. Louis to Cancun, returning Wed, Oct 14, priced at CA $625 found 4 days ago
Delta
Wed, Oct 7 - Wed, Oct 14
STL
St. Louis
CUN
Cancun
CA $625 Roundtrip, found 4 days ago
CA $625
Roundtrip
found 4 days ago
Select Delta flight, departing Wed, Oct 7 from St. Louis to Cancun, returning Wed, Oct 14, priced at CA $625 found 4 days ago
American Airlines
Wed, Oct 7 - Wed, Oct 14
STL
St. Louis
CUN
Cancun
CA $632 Roundtrip, found 4 days ago
CA $632
Roundtrip
found 4 days ago
Select American Airlines flight, departing Wed, Oct 7 from St. Louis to Cancun, returning Wed, Oct 14, priced at CA $632 found 4 days ago
American Airlines
Wed, Oct 7 - Wed, Oct 14
STL
St. Louis
CUN
Cancun
CA $644 Roundtrip, found 4 days ago
CA $644
Roundtrip
found 4 days ago
Select American Airlines flight, departing Wed, Oct 7 from St. Louis to Cancun, returning Wed, Oct 14, priced at CA $644 found 4 days ago
American Airlines
Sat, Sep 19 - Tue, Sep 22
STL
St. Louis
CUN
Cancun
CA $647 Roundtrip, found 1 day ago
CA $647
Roundtrip
found 1 day ago
Select American Airlines flight, departing Sat, Sep 19 from St. Louis to Cancun, returning Tue, Sep 22, priced at CA $647 found 1 day ago
American Airlines
Thu, Jul 30 - Sun, Aug 2
STL
St. Louis
CUN
Cancun
CA $647 Roundtrip, found 3 days ago
CA $647
Roundtrip
found 3 days ago
Select American Airlines flight, departing Thu, Jul 30 from St. Louis to Cancun, returning Sun, Aug 2, priced at CA $647 found 3 days ago
American Airlines
Wed, Aug 5 - Sun, Aug 9
STL
St. Louis
CUN
Cancun
CA $653 Roundtrip, found 10 hours ago
CA $653
Roundtrip
found 10 hours ago
Select American Airlines flight, departing Wed, Aug 5 from St. Louis to Cancun, returning Sun, Aug 9, priced at CA $653 found 10 hours ago
American Airlines
Sat, Aug 8 - Fri, Aug 14
STL
St. Louis
CUN
Cancun
CA $655 Roundtrip, found 4 days ago
CA $655
Roundtrip
found 4 days ago
Select American Airlines flight, departing Sat, Aug 8 from St. Louis to Cancun, returning Fri, Aug 14, priced at CA $655 found 4 days ago
Air Canada
Mon, Aug 31 - Sun, Sep 6
STL
St. Louis
CUN
Cancun
CA $772 Roundtrip, found 3 days ago
CA $772
Roundtrip
found 3 days ago
Select Air Canada flight, departing Mon, Aug 31 from St. Louis to Cancun, returning Sun, Sep 6, priced at CA $772 found 3 days ago
United
Wed, Oct 7 - Wed, Oct 14
STL
St. Louis
CUN
Cancun
CA $796 Roundtrip, found 4 days ago
CA $796
Roundtrip
found 4 days ago
Select United flight, departing Wed, Oct 7 from St. Louis to Cancun, returning Wed, Oct 14, priced at CA $796 found 4 days ago

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 cheap one-way flights from CA $305 and cheap return flights from CA $625 STL to CUN with Expedia. Return flights often range between CA$572 and CA$1801. 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 the 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-Lambert-St. Louis Intl.) to Cancun, Quintana Roo (CUN-Cancun Intl.)?
September is typically the cheapest month to fly from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Cancun, Quintana Roo (CUN-Cancun Intl.), with average return fares around CA$678. September often sees lower prices because it falls outside of peak holiday seasons and summer travel, when demand tends to decrease. Other cheap months to fly from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Cancun, Quintana Roo (CUN-Cancun Intl.) include January and October.
Which airlines fly direct from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Cancun, Quintana Roo (CUN-Cancun Intl.)?
You have 2 airlines offering direct flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Cancun, Quintana Roo (CUN-Cancun Intl.). Here are the carriers:
  • Southwest Airlines operates 11 direct flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Cancun, Quintana Roo (CUN-Cancun Intl.) every week.
  • Frontier Airlines operates 7 direct flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Cancun, Quintana Roo (CUN-Cancun Intl.) every week.
How do I find cheap flights from St. Louis, MO (STL) to Cancun, Quintana Roo (CUN)?
To find a cheap flight from St. Louis, MO (STL) to Cancun, Quintana Roo (CUN), 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-Lambert-St. Louis Intl.) to Cancun, Quintana Roo (CUN-Cancun Intl.)?
The best time to fly from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Cancun, Quintana Roo (CUN-Cancun Intl.) is typically September or January. These months offer a great balance, with average return flight prices around CA$678. You'll also find plenty of flight options during these times, as they are popular for travel. September offers a chance to visit Cancun after the peak summer crowds, while January is perfect for escaping the winter chill and enjoying the warm Caribbean weather.
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-Lambert-St. Louis Intl.) to Cancun, Quintana Roo (CUN-Cancun Intl.)?
The earliest flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Cancun, Quintana Roo (CUN-Cancun Intl.) typically departs around 5:00 AM. This service is offered by American Airlines. This is a seasonal service, active in January, November, and December. An early departure like this can help you make the most of your time at your destination. To compare early flights on Expedia, select 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 direct flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Cancun, Quintana Roo (CUN-Cancun Intl.) typically takes around 3 hours 18 minutes. This route covers a distance of approximately 2,000 kilometres. If you opt for a one-stop flight, your travel time will be longer, usually around 6 hours 30 minutes, depending on your layover. Keep in mind that actual flight times can vary due to factors like wind patterns and air traffic, so it's always a good idea to allow for some extra time when planning your trip.
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-Lambert-St. Louis Intl.) to Cancun, Quintana Roo (CUN-Cancun Intl.) flight with Expedia?
It's easy to earn miles on a St. Louis, MO (STL-Lambert-St. Louis Intl.) to Cancun, Quintana Roo (CUN-Cancun Intl.) 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.
What airports do you fly into for Cancun, Quintana Roo (CUN) from St. Louis, MO (STL)?
If you're planning to travel to Cancun from Lambert-St. Louis Intl. (STL), you can fly directly into Cancun Intl. (CUN). Some flights may connect through major hubs like Seattle - Tacoma Intl. (SEA), O'Hare Intl. (ORD), or Dallas-Fort Worth Intl. (DFW) before reaching Cancun. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Cancun, Quintana Roo (CUN-Cancun Intl.) at the last minute?
Typically, booking a last minute flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Cancun, Quintana Roo (CUN-Cancun Intl.) 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-Lambert-St. Louis Intl.) to Cancun, Quintana Roo (CUN-Cancun Intl.) flight and hotel package?
Securing a St. Louis, MO (STL-Lambert-St. Louis Intl.) to Cancun, Quintana Roo (CUN-Cancun Intl.) 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) to Cancun, Quintana Roo (CUN)?
If you booked your St. Louis, MO (STL) to Cancun, Quintana Roo (CUN) 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, American Airlines, Delta
Roundtrip price
CA $625
Distance
1984 km
Average flight time
3 hours 7 mins

Book with confidence

St. Louis to Cancun Flights

The easy way to book your flights from St. Louis to Cancun 

With Expedia, it’s simple to find and book flights to Cancun from St. Louis whether you’re traveling for business or pleasure. Enter your travel dates, hit search, and choose your flight from 20 airlines that cover this route. There are nonstop flights to Cancun Intl., too.  

Choose your preferred carrier and cabin class with the advanced search tool and select your ideal departure time. Then, if you want, you can see just nonstop or refundable flights. And if you’re traveling last minute, just enter the date to check out flights from St. Louis to Cancun today, tomorrow, or this week.  

 

Save dollars with cheap flights from Lambert-St. Louis Intl., STL to Cancun Intl., CUN 

Sort your search results by price to find great deals on your flight from St. Louis to Cancun—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to Cancun from St. Louis currently is just CA $625 rising to CA $796.  

Here are more money-saving tips: 

  • Fly in October when flight prices are normally at their lowest 
  • Book about a month to 6 weeks before you travel for the best prices to Cancun  
  • Avoid peak season and weekends when flights can cost more
  • Early morning and late-night flights are sometimes cheaper, so try varying your travel times 
  • One surefire way to save money on your flight is to book your flight and hotel together with Expedia. Sometimes, the savings are so large that the flight is basically free! 

 

Reasons to choose Expedia for your flight to Cancun from St. Louis 

Whatever your destination, budget, or reason to travel, in just one quick search, you can choose from loads of flights, airlines, and cabin classes. The filters make it quick and easy to find your ideal flights, and if you choose one of the flexible options, you won’t be charged to change your flight. So book your flight to Cancun with Expedia today.

St. Louis to Cancun Flights

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