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Cancún

$107+ 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 3/10. Fares are subject to change and may not be available on all flights or dates of travel.
STL — CUN
Feb 20 — Feb 271
Fri 2/20
Fri 2/27
1 adult, Economy
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Find cheap flights from St. Louis to Cancún with Cheapflights

1. Tell us where you want to go

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Cheapflights Tip: The best prices from Lambert-St Louis to Cancun are usually found in September or October, booked 18 days in advance, depart on a Monday or Wednesday and return on a Thursday

Cheap 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 January 21, 2026.

This Kiwi.com deal was found by Cheapflights users on 1/19. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/26:00 am
STL
-
CUN
Nonstop3h 30m
Frontier
Tue 3/311:40 am
CUN
-
STL
2 stops20h 11m
Frontier
Deal found 1/19$305
This Kiwi.com deal was found by Cheapflights users on 1/19. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/36:00 am
STL
-
CUN
Nonstop3h 30m
Frontier
Sat 3/72:22 pm
CUN
-
STL
1 stop16h 35m
Frontier
Deal found 1/19$316
This Kiwi.com deal was found by Cheapflights users on 1/19. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/288:17 pm
STL
-
CUN
1 stop11h 34m
Frontier
Tue 3/311:40 am
CUN
-
STL
2 stops20h 11m
Frontier
Deal found 1/19$320
This Frontier deal was found by Cheapflights users on 1/19. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/276:00 am
STL
-
CUN
Nonstop3h 30m
Frontier
Wed 3/411:42 am
CUN
-
STL
Nonstop3h 27m
Frontier
Deal found 1/19$324
This Kiwi.com deal was found by Cheapflights users on 1/19. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/278:22 pm
STL
-
CUN
1 stop11h 44m
Frontier
Tue 3/311:40 am
CUN
-
STL
2 stops20h 11m
Frontier
Deal found 1/19$326
This Kiwi.com deal was found by Cheapflights users on 1/19. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/23:49 pm
STL
-
CUN
1 stop16h 29m
Multiple Airlines
Wed 3/411:42 am
CUN
-
STL
Nonstop3h 27m
Multiple Airlines
Deal found 1/19$327
This Kiwi.com deal was found by Cheapflights users on 1/19. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/278:22 pm
STL
-
CUN
1 stop11h 44m
Frontier
Sat 3/712:44 pm
CUN
-
STL
Nonstop3h 27m
Frontier
Deal found 1/19$328
This Kiwi.com deal was found by Cheapflights users on 1/21. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/208:20 pm
STL
-
CUN
1 stop11h 31m
Frontier
Wed 2/257:19 pm
CUN
-
STL
2 stops36h 32m
Frontier
Deal found 1/21$330
This Kiwi.com deal was found by Cheapflights users on 1/21. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/19:09 am
STL
-
CUN
2 stops15h 27m
Multiple Airlines
Fri 2/64:30 pm
CUN
-
STL
1 stop15h 21m
Multiple Airlines
Deal found 1/21$331
This Kiwi.com deal was found by Cheapflights users on 1/21. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/15:42 pm
STL
-
CUN
1 stop14h 31m
Multiple Airlines
Sun 2/84:30 pm
CUN
-
STL
1 stop15h 21m
Multiple Airlines
Deal found 1/21$332
This Kiwi.com deal was found by Cheapflights users on 1/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/308:22 pm
STL
-
CUN
2 stops14h 54m
Multiple Airlines
Thu 2/52:57 pm
CUN
-
STL
1 stop16h 54m
Multiple Airlines
Deal found 1/20$333
This Kiwi.com deal was found by Cheapflights users on 1/21. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/19:09 am
STL
-
CUN
2 stops15h 27m
Multiple Airlines
Sat 2/710:13 am
CUN
-
STL
1 stop14h 20m
Multiple Airlines
Deal found 1/21$336

Find 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 January 21, 2026.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$305
(Kiwi.com)

One-way from

$107
(Super.com)

Popular in

March

Cheapest in

September

Average price

$413

Good round-trip deal

$416 or less

Good one-way deal

$251 or less
Provider with most accurate pricing for Lambert-St Louis-Cancun flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Cancun flights.
Search Deals
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. 10% potential increase in price ($54 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($13 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
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

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 January 21, 2026.
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 4/19

6:00 am-12:45 pm

1 stop6h 45m

Cancun

Thu 4/23

12:25 pm-11:33 pm

2 stops11h 08m

$384

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Mon 3/2

9:00 pm-7:45 pm

2 stops21h 45m

Cancun

Thu 3/5

6:20 pm-12:05 am

1 stop6h 45m

$414

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Sun 3/1

6:00 am-6:47 pm

2 stops11h 47m

Cancun

Tue 3/3

5:45 pm-11:36 pm

1 stop6h 51m

$434

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Wed 4/8

6:29 am-2:10 pm

1 stop7h 41m

Cancun

Tue 4/14

9:55 am-5:54 pm

1 stop7h 59m

$434

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Tue 3/3

6:00 am-8:02 pm

2 stops13h 02m

Cancun

Thu 3/5

12:37 pm-11:36 pm

2 stops11h 59m

$434

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Sun 3/1

10:13 am-9:11 pm

1 stop9h 58m

Cancun

Wed 3/4

8:38 am-7:39 pm

2 stops12h 01m

$434

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Sun 4/5

6:29 am-6:40 pm

2 stops12h 11m

Cancun

Thu 4/9

3:10 pm-11:25 pm

1 stop8h 15m

$434

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Tue 3/24

7:03 am-8:02 pm

2 stops12h 59m

Cancun

Tue 3/31

11:05 am-9:06 pm

2 stops10h 01m

$439

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Tue 3/3

10:13 am-4:45 pm

1 stop5h 32m

Cancun

Sat 3/7

8:00 am-3:56 pm

1 stop8h 56m

$479

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Wed 2/18

8:17 pm-8:51 am

1 stop11h 34m

$130

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/21

Showing 1-10 of 20 results
1
2

Compare providers for flights from St. Louis to Cancún

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Cancún in January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
AranGrantPrice Accuracy2 starsTrust Score*3 stars
CheapOairPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars
Kiwi.comPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*1 star
MytripPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on St. Louis-Cancún flights, users find the pricing of CheapOair to be most consistent on Cheapflights vs. CheapOair Users can find the same prices on St. Louis-Cancún flight deals on Cheapflights vs. CheapOair >95% of the time. Price accuracy is based on data collected from St. Louis-Cancún flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on St. Louis-Cancún flights, Cheapflights users trust CheapOair the most. CheapOair has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Cancún flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 January 16, 2026.

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 18 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, February is the cheapest month in which you can book a flight from St. Louis to Cancún (average of $156). Flying from St. Louis to Cancún in July is currently the most expensive (average of $225). 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 January 21, 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from St. Louis to Cancún as you normally would.

The best insider tips for St. Louis to Cancún flights

AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your St. Louis to Cancún trip
Our travel experts
Taryn White

Taryn White

Expert on STL

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

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

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 January 21, 2026.
Get a feel of what it's like to fly with Southwest, United Airlines, and American Airlines 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
4,266 reviews

Boarding

8.1

Crew

8.6

Overall

8.0

Entertainment

7.5

Food

7.0

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Southwest
8.0
Very good
4,266 reviews
Southwest
8.0
Very good
4,266 reviews

Boarding

8.1

Crew

8.6

Overall

8.0

Entertainment

7.5

Food

7.0

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
United Airlines
7.4
Good
9,191 reviews
Southwest
8.0
Very good
4,266 reviews

Boarding

8.1

Crew

8.6

Overall

8.0

Entertainment

7.5

Food

7.0

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
American Airlines
7.2
Good
11,174 reviews
Southwest
8.0
Very good
4,266 reviews

Boarding

8.1

Crew

8.6

Overall

8.0

Entertainment

7.5

Food

7.0

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Volaris
6.6
Okay
1,172 reviews
Southwest
8.0
Very good
4,266 reviews

Boarding

8.1

Crew

8.6

Overall

8.0

Entertainment

7.5

Food

7.0

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Frontier
5.7
Fair
3,057 reviews
Southwest
8.0
Very good
4,266 reviews

Boarding

8.1

Crew

8.6

Overall

8.0

Entertainment

7.5

Food

7.0

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

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 00m 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, 28 users have taken a look at flights from Lambert-St Louis to Cancun.

  • How long is the flight from St. Louis to Cancún?

    A quick flight from St. Louis to Cancún can take about 6h 45m. Delta provides one of the quickest options available for as low as $384. There are 1241 mi between St. Louis and Cancún. This flight may include one or multiple stops.

  • 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 $130 on this airline. Additional options worth looking into are Volaris and Frontier, starting at $174 and $195 round-trip. Spirit Airlines is 72% 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 $138 on Frontier. Other airlines that offer cheap prices include United Airlines from $173 and Volaris from $174 one-way.

  • What are the most reliable airlines from St. Louis to Cancún?

    No one likes to see their flight delayed. When booking a flight from St. Louis to Cancún consider choosing Frontier (78%), Southwest (63%) or American Airlines (25%) as they are the most reliable in getting you off to your destination on time.

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

    Looking at all options, your cheapest flight can be booked for $100. While the most popular route (Lambert-St Louis - Cancun) can be booked for $285 on average, our data indicates $427 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, February is the cheapest month in which you can book a flight from St. Louis to Cancún (average of $156). Flying from St. Louis to Cancún in July is currently the most expensive (average of $225). 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 Cancún?

Book flights to Cancún 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 January 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$130Average$292FlexibilityNo cancel feeOn-time65%
VolarisCheapest$174Average$369FlexibilityNo cancel feeOn-time79%
FrontierCheapest$195Average$410FlexibilityNo cancel feeOn-time62%
AeromexicoCheapest$196Average$493FlexibilityNo cancel feeOn-timeN/A
DeltaCheapest$239Average$532FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$330Average$550FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$423Average$616FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$505Average$650FlexibilityNo cancel feeOn-time63%

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