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$109+ 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 8/29. Fares are subject to change and may not be available on all flights or dates of travel.
STL — CUN
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
1 adult, Economy
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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 3, 2025.

Round-trip from

$303
(FlightHub)

One-way from

$109
(Kiwi.com)

Popular in

March

Cheapest in

April

Average price

$533

Good round-trip deal

$300 or less

Good one-way deal

$243 or less
From Lambert-St Louis to Cancun
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One-way flight from Lambert-St Louis to Cancun
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Highest demand for flights based on searches. 2% potential increase in price ($10 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($14 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Price to beat on a round-trip flight from Lambert-St Louis to Cancun.
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Price to beat on a one-way flight from Lambert-St Louis to Cancun.
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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 3, 2025.

This FlightHub deal was found by Cheapflights users on 7/1. 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.
Fri 8/222:30 pmSTL - CUN
1 stop18h 03mSpirit Airlines
Sat 8/231:42 pmCUN - STL
1 stop19h 58mSpirit Airlines
Deal found 7/1$303
This CheapOair deal was found by Cheapflights users on 7/2. 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 8/2210:26 amSTL - CUN
Nonstop3h 20mVolaris
Sun 8/243:01 pmCUN - STL
Nonstop3h 08mVolaris
Deal found 7/2$304
This CheapOair deal was found by Cheapflights users on 7/2. 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.
Tue 10/287:37 pmSTL - CUN
1 stop15h 56mMultiple Airlines
Tue 11/43:50 pmCUN - STL
Nonstop3h 17mMultiple Airlines
Deal found 7/2$311
This Priceline deal was found by Cheapflights users on 7/2. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/315:40 pmSTL - CUN
1 stop14h 08mFrontier
Thu 8/710:37 amCUN - STL
1 stop8h 46mFrontier
Deal found 7/2$349

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 3, 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

Fri 8/22

2:30 pm-8:33 am

1 stop18h 03m

Cancun

Sat 8/23

1:42 pm-9:40 am

1 stop19h 58m

$303

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Fri 8/22

10:26 am-1:46 pm

Nonstop3h 20m

Cancun

Sun 8/24

3:01 pm-6:09 pm

Nonstop3h 08m

$304

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Tue 10/28

7:37 pm-11:33 am

1 stop15h 56m

Cancun

Tue 11/4

3:50 pm-6:07 pm

Nonstop3h 17m

$311

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Thu 7/31

5:40 pm-7:48 am

1 stop14h 08m

Cancun

Thu 8/7

10:37 am-7:23 pm

1 stop8h 46m

$349

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Fri 8/29

10:26 am-1:46 pm

Nonstop3h 20m

$109

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Fri 8/15

2:30 pm-8:33 am

1 stop18h 03m

$135

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Mon 8/4

7:29 pm-4:20 pm

1 stop20h 51m

$167

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Sun 8/10

7:59 pm-9:46 am

1 stop13h 47m

$179

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

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 3, 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 June 29, 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.

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 3, 2025.
Get a feel of what it's like to fly with Volaris, Spirit Airlines, and Frontier 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.
Volaris
6.7
Okay
1,171 reviews

Comfort

6.4

Food

5.4

Overall

6.7

Crew

7.3

Entertainment

5.0

Boarding

6.6

Reviews

1 / 20
8.0
Excellent

Bernard,Apr 2025

MLM - LAX

Volaris has the route and the price to beat other airlines. Its service is basic and quite OK. Its web site, internet boarding appears to be in turmoil. For travel to Morelia, it is what we choose.
Volaris
6.7
Okay
1,171 reviews
Volaris
6.7
Okay
1,171 reviews

Comfort

6.4

Food

5.4

Overall

6.7

Crew

7.3

Entertainment

5.0

Boarding

6.6

Reviews

1 / 20
8.0
Excellent

Bernard,Apr 2025

MLM - LAX

Volaris has the route and the price to beat other airlines. Its service is basic and quite OK. Its web site, internet boarding appears to be in turmoil. For travel to Morelia, it is what we choose.
Spirit Airlines
6.3
Okay
8,086 reviews
Volaris
6.7
Okay
1,171 reviews

Comfort

6.4

Food

5.4

Overall

6.7

Crew

7.3

Entertainment

5.0

Boarding

6.6

Reviews

1 / 20
8.0
Excellent

Bernard,Apr 2025

MLM - LAX

Volaris has the route and the price to beat other airlines. Its service is basic and quite OK. Its web site, internet boarding appears to be in turmoil. For travel to Morelia, it is what we choose.
Frontier
5.9
Fair
3,286 reviews
Volaris
6.7
Okay
1,171 reviews

Comfort

6.4

Food

5.4

Overall

6.7

Crew

7.3

Entertainment

5.0

Boarding

6.6

Reviews

1 / 20
8.0
Excellent

Bernard,Apr 2025

MLM - LAX

Volaris has the route and the price to beat other airlines. Its service is basic and quite OK. Its web site, internet boarding appears to be in turmoil. For travel to Morelia, it is what we choose.

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 is 1 flight 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 Spirit Airlines. Our recent data shows that you can find tickets from as low as $303 on this airline. Additional options worth looking into are Volaris and Frontier, starting at $304 and $349 round-trip. Spirit Airlines is 42% 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 $109 on Volaris. Other airlines that offer cheap prices include Spirit Airlines from $135 and Frontier from $167 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 $239 on average our data indicates $315 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

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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 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$130Average$294FlexibilityNo cancel feeOn-time65%
VolarisCheapest$175Average$372FlexibilityNo cancel feeOn-time79%
FrontierCheapest$291Average$485FlexibilityNo cancel feeOn-time62%
AeromexicoCheapest$342Average$496FlexibilityNo cancel feeOn-timeN/A
DeltaCheapest$358Average$553FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$449Average$579FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$451Average$605FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$519Average$672FlexibilityNo cancel feeOn-time63%

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