HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Cancún

$108+ Cheap flights from St. Louis (STL) to Cancún (CUN)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/2. Fares are subject to change and may not be available on all flights or dates of travel.
STL — CUN
Jul 16 — Jul 231
Wed 7/16
Wed 7/23
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from St. Louis to Cancún with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Lambert-St Louis to Cancun are usually found in April or January, booked 87 days in advance, depart on a Tuesday or Monday and return on a Sunday

Cheap flight deals from St. Louis to Cancún

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Cancún (CUN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 11, 2025.

Round-trip from

$294
(CheapOair)

One-way from

$118
(Cheapflightsfares)

Popular in

March

Cheapest in

April

Average price

$533

Good round-trip deal

$337 or less

Good one-way deal

$243 or less
From Lambert-St Louis to Cancun
Search Deals
One-way flight from Lambert-St Louis to Cancun
Search Deals
Highest demand for flights based on searches. 2% potential increase in price ($10 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2025
Search Deals
Price to beat on a round-trip flight from Lambert-St Louis to Cancun.
Search Deals
Price to beat on a one-way flight from Lambert-St Louis to Cancun.
Search Deals

Find flight deals from St. Louis to Cancún

Cheapest flights from St. Louis to Cancún
Explore the most affordable flight options available from St. Louis to Cancún. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 11, 2025.

This CheapOair deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/267:37 pmSTL - CUN
1 stop15h 56mMultiple Airlines
Sun 11/23:50 pmCUN - STL
Nonstop3h 17mMultiple Airlines
Deal found 7/8$294
This Cheapflightsfares deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/610:21 amSTL - CUN
Nonstop3h 13mFrontier
Sat 9/132:49 pmCUN - STL
Nonstop3h 21mFrontier
Deal found 7/8$297
This FlightHub deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/1410:35 amSTL - CUN
1 stop24h 47mSpirit Airlines
Sat 9/209:40 amCUN - STL
1 stop27h 55mSpirit Airlines
Deal found 7/8$303
This CheapOair deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1210:21 amSTL - CUN
Nonstop3h 13mVolaris
Thu 9/182:49 pmCUN - STL
Nonstop3h 21mVolaris
Deal found 7/8$304

Cheapflights Fare Finder

Customize your flight search to find flights from St. Louis to Cancún that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 11, 2025.
Use the filters below to find and compare flights from St. Louis to Cancún that are best for you.

Fly from

St. Louis

Fly to

Cancún

Route

Depart

Return

Price

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Sun 10/26

7:37 pm-11:33 am

1 stop15h 56m

Cancun

Sun 11/2

3:50 pm-6:07 pm

Nonstop3h 17m

$294

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Sat 9/6

10:21 am-1:34 pm

Nonstop3h 13m

Cancun

Sat 9/13

2:49 pm-6:10 pm

Nonstop3h 21m

$297

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Sun 9/14

10:35 am-11:22 am

1 stop24h 47m

Cancun

Sat 9/20

9:40 am-1:35 pm

1 stop27h 55m

$303

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Fri 9/12

10:21 am-1:34 pm

Nonstop3h 13m

Cancun

Thu 9/18

2:49 pm-6:10 pm

Nonstop3h 21m

$304

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Tue 9/2

10:26 am-1:46 pm

Nonstop3h 20m

$108

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Mon 8/18

2:30 pm-8:33 am

1 stop18h 03m

$120

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Thu 9/25

10:39 am-8:55 am

1 stop22h 16m

$151

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Mon 8/11

7:29 pm-4:20 pm

1 stop20h 51m

$155

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Wed 11/5

3:30 pm-7:45 pm

Nonstop3h 15m

$187

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/8

The best insider tips for St. Louis to Cancún flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your St. Louis to Cancún trip
Airports
STL

Expect security screening at STL to take 5 to 10 minutes during off-peak times. Check real-time wait times online before heading to the airport.

Read more about STLby Taryn White
CUN

For a stress-free arrival at CUN, arrange a hotel transfer in advance. Avoid taxi scammers by agreeing on the price before getting in the car.

Read more about CUNby Ramsey Qubein
Our travel experts
Taryn White

Taryn White

Expert on STL

Taryn White

Taryn White

Taryn White is a freelance travel writer, digital creator, and travel advisor who has visited nearly 100 countries and all 50 states. She’s familiar with many airports and enjoys beach hopping, boutique hotels, spa experiences, and exploring local culture. Her work has appeared in Travel + Leisure, Condé Nast Traveler, National Geographic, Smithsonian Magazine, AFAR, and more.

Read more
Ramsey Qubein

Ramsey Qubein

Expert on CUN

Ramsey Qubein

Ramsey Qubein

An avid traveler and aviation expert who has visited 173 countries, all 50 states and seven continents, Ramsey Qubein flies nearly 400,000 miles a year. As a North Carolina-based freelance journalist for publications including Conde Nast Traveler, Forbes, USA Today and Bloomberg among others, he explores the latest trends in aviation, hospitality, cruises and business.

Read more

Best time to book a flight from St. Louis to Cancún

Have a flexible travel schedule? Discover the best time to fly to Cancún from St. Louis with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Cancún

How far ahead should I book a flight from St. Louis to Cancún?

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Cancún. Price data was last updated on June 27, 2025.

The price you pay for your flight from St. Louis to Cancún may vary depending on when you book. For the best chance of a lower fare, look to book 87 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from St. Louis to Cancún?

Currently, January is the cheapest month in which you can book a flight from St. Louis to Cancún (average of $360). Flying from St. Louis to Cancún in March is currently the most expensive (average of $492). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from STL to CUN?

Find hourly flight availability from St. Louis to Cancún. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 11, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 58% on flights from St. Louis to Cancún by exploring options for tickets in the afternoon.

What is the cheapest day to fly from St. Louis to Cancún?

Use this chart to determine the cheapest time to fly round-trip from St. Louis to Cancún. Price data was last updated on July 6, 2025.

Travelers seeking maximum savings on their St. Louis to Cancún flight should consider departing on Thursday evenings when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from St. Louis to Cancún

Explore weekly flight availability from St. Louis to Cancún. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated July 11, 2025.

The most flights from STL to CUN are scheduled on a Monday (3 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (1 on average).

How much does it cost to fly round-trip from St. Louis to Cancún?

Reviews of airlines servicing Cancún

Get insights into the airlines that provide service to Cancún. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Cancún. Reviews last updated July 11, 2025.
Get a feel of what it's like to fly with Southwest, American Airlines, and Volaris from St. Louis to Cancún by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,250 reviews

Comfort

8.0

Food

7.0

Boarding

8.1

Entertainment

7.6

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Southwest
8.0
Very good
4,250 reviews
Southwest
8.0
Very good
4,250 reviews

Comfort

8.0

Food

7.0

Boarding

8.1

Entertainment

7.6

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,250 reviews

Comfort

8.0

Food

7.0

Boarding

8.1

Entertainment

7.6

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Volaris
6.7
Okay
1,166 reviews
Southwest
8.0
Very good
4,250 reviews

Comfort

8.0

Food

7.0

Boarding

8.1

Entertainment

7.6

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Spirit Airlines
6.3
Okay
8,055 reviews
Southwest
8.0
Very good
4,250 reviews

Comfort

8.0

Food

7.0

Boarding

8.1

Entertainment

7.6

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Frontier
5.9
Fair
3,271 reviews
Southwest
8.0
Very good
4,250 reviews

Comfort

8.0

Food

7.0

Boarding

8.1

Entertainment

7.6

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Cancún. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airports do I use to fly from St. Louis to Cancún?

    Booking a flight from Lambert-St Louis (STL) to Cancun (CUN) is your only option if you wish to fly from St. Louis to Cancún. On a typical day, there are 2 flights from Lambert-St Louis to Cancun, all of which are around 3h 10m for a nonstop flight. You can also purchase a plane ticket from 8 airlines when you book a flight from Lambert-St Louis to Cancún.

  • How popular is this St. Louis to Cancún flight route?

    Within the past month, 21 users have taken a look at flights from Lambert-St Louis to Cancun.

  • What are the cheapest airlines flying from St. Louis to Cancún round-trip?

    Our cheapest airline available from St. Louis to Cancún is Frontier. Our recent data shows that you can find tickets from as low as $297 on this airline. Additional options worth looking into are Spirit Airlines and Volaris, starting at $303 and $304 round-trip. Frontier is 43% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from St. Louis to Cancún one-way?

    One-way options have recently been found by users for as low as $118 on Volaris. Other airlines that offer cheap prices include Spirit Airlines from $120 and Frontier from $151 one-way.

  • What are the cheapest flights from St. Louis to Cancún?

    Looking at all options, your cheapest flight can be booked for $189. While the most popular route (Lambert-St Louis - Cancun) can be booked for $254 on average our data indicates $344 when flying from St. Louis to Cancún.

  • Can I find deals for flights from St. Louis to Cancún that include hotel bookings?

    Yes. In addition to deals on St. Louis to Cancún flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Cancún?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Cancún.

  • Can I find deals for business class flights from St. Louis to Cancún?

    Yes. Cheapflights offers flight deals from St. Louis to Cancún by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from St. Louis to Cancún?

    Currently, January is the cheapest month in which you can book a flight from St. Louis to Cancún (average of $360). Flying from St. Louis to Cancún in March is currently the most expensive (average of $492). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Puerto Aventuras
Holbox
Punta Sam

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 8 airlines flying from St. Louis to Cancún

Discover the top 8 airlines that operate flights from St. Louis to Cancún. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$130Average$294FlexibilityNo cancel feeOn-time65%
VolarisCheapest$175Average$372FlexibilityNo cancel feeOn-time79%
FrontierCheapest$293Average$484FlexibilityNo cancel feeOn-time62%
AeromexicoCheapest$342Average$496FlexibilityNo cancel feeOn-timeN/A
DeltaCheapest$358Average$553FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$449Average$577FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$452Average$605FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$519Average$672FlexibilityNo cancel feeOn-time63%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.