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St. Louis

$132+ Cheap flights from Cancún (CUN) to St. Louis (STL)

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 12/12. Fares are subject to change and may not be available on all flights or dates of travel.
CUN — STL
Oct 29 — Nov 51
Wed 10/29
Wed 11/5
1 adult, Economy
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Cheap flight deals from Cancún to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Cancún (CUN) to St. Louis (STL). 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 September 29, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$265
(Delta)

One-way from

$132
(Cheapflightsfares)

Popular in

January

Cheapest in

September

Average price

$223

Good one-way deal

$185 or less
Provider with most accurate pricing for Cancun-Lambert-St Louis flight deals.
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Provider most trusted by Cheapflights users for Cancun-Lambert-St Louis flights.
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From Cancun to Lambert-St Louis
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One-way flight from Cancun to Lambert-St Louis
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Highest demand for flights based on searches. 27% potential increase in price ($157 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($26 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a one-way flight from Cancun to Lambert-St Louis.
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Find flight deals from Cancún to St. Louis

Cheapest flights from Cancún to St. Louis
Explore the most affordable flight options available from Cancún to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 29, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 9/27. 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.
Thu 10/92:50 pmCUN - STL
Nonstop3h 17mFrontier
Sun 10/1910:22 amSTL - CUN
Nonstop3h 13mFrontier
Deal found 9/27$283
This United Airlines deal was found by Cheapflights users on 9/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/128:39 amCUN - STL
2 stops14h 15mUnited Airlines
Wed 11/196:15 amSTL - CUN
1 stop6h 19mUnited Airlines
Deal found 9/28$310
This Priceline deal was found by Cheapflights users on 9/28. 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.
Wed 11/123:45 pmCUN - STL
Nonstop3h 15mFrontier
Wed 11/1910:17 amSTL - CUN
Nonstop3h 13mFrontier
Deal found 9/28$335
This American Airlines deal was found by Cheapflights users on 9/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/911:00 amCUN - STL
1 stop8h 24mAmerican Airlines
Sun 10/197:16 amSTL - CUN
1 stop6h 34mAmerican Airlines
Deal found 9/27$369
This CheapOair deal was found by Cheapflights users on 9/27. 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.
Thu 10/91:30 pmCUN - STL
1 stop30h 27mMultiple Airlines
Sun 10/1910:22 amSTL - CUN
Nonstop3h 13mMultiple Airlines
Deal found 9/27$386
This Delta deal was found by Cheapflights users on 9/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/98:00 amCUN - STL
1 stop6h 43mDelta
Sun 10/199:10 amSTL - CUN
2 stops11h 35mDelta
Deal found 9/27$429

Cheapflights Fare Finder

 
Customize your flight search to find flights from Cancún to St. Louis 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 September 29, 2025.
Use the filters below to find and compare flights from Cancún to St. Louis that are best for you.

Fly from

Cancún

Fly to

St. Louis

Route

Depart

Return

Price

CancúnSt. Louis

CUN - STL

CUNSTL

Cancun

Tue 1/13

2:10 pm-11:10 pm

1 stop10h 00m

Lambert-St Louis

Tue 2/10

6:30 am-4:15 pm

1 stop8h 45m

$265

CancúnSt. Louis

CUN - STL

CUNSTL

Cancun

Thu 2/19

1:40 pm-8:39 pm

1 stop7h 59m

Lambert-St Louis

Sun 2/22

7:30 am-4:31 pm

1 stop8h 01m

$267

CancúnSt. Louis

CUN - STL

CUNSTL

Cancun

Thu 10/9

2:50 pm-6:07 pm

Nonstop3h 17m

Lambert-St Louis

Sun 10/19

10:22 am-1:35 pm

Nonstop3h 13m

$283

CancúnSt. Louis

CUN - STL

CUNSTL

Cancun

Wed 11/12

2:44 pm-10:22 pm

1 stop8h 38m

Lambert-St Louis

Wed 11/19

6:15 am-8:18 pm

1 stop13h 03m

$310

CancúnSt. Louis

CUN - STL

CUNSTL

Cancun

Tue 1/13

8:39 am-10:58 pm

2 stops15h 19m

Lambert-St Louis

Tue 2/10

6:30 am-5:50 pm

2 stops10h 20m

$310

CancúnSt. Louis

CUN - STL

CUNSTL

Cancun

Tue 1/13

1:01 pm-3:29 pm

Nonstop3h 28m

Lambert-St Louis

Tue 2/10

7:00 am-11:24 am

Nonstop3h 24m

$319

CancúnSt. Louis

CUN - STL

CUNSTL

Cancun

Wed 11/12

3:45 pm-6:00 pm

Nonstop3h 15m

Lambert-St Louis

Wed 11/19

10:17 am-2:30 pm

Nonstop3h 13m

$335

CancúnSt. Louis

CUN - STL

CUNSTL

Cancun

Wed 11/12

3:45 pm-6:00 pm

Nonstop3h 15m

Lambert-St Louis

Wed 11/19

4:05 pm-9:15 pm

1 stop28h 10m

$346

CancúnSt. Louis

CUN - STL

CUNSTL

Cancun

Fri 2/27

12:14 pm-11:10 pm

2 stops11h 56m

$170

CancúnSt. Louis

CUN - STL

CUNSTL

Cancun

Wed 2/25

8:00 am-4:01 pm

1 stop9h 01m

$170

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/29

Showing 1-10 of 17 results
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Compare providers for flights from Cancún to St. Louis

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 Cancún to St. Louis in September.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy2 starsTrust Score*1 star
PricelinePrice Accuracy1 starTrust 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 Cancún-St. Louis flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Cancún-St. Louis flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Cancún-St. Louis flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Cancún-St. Louis flights, Cheapflights users trust FlightHub the most. FlightHub 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 Cancún-St. Louis flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

The best insider tips for Cancún to St. Louis 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 Cancún to St. Louis trip
Airports
CUN

CUN's terminals are crowded, so arrive early to navigate security lines and packed areas efficiently.

Read more about CUNby Ramsey Qubein
STL

Use the MetroLink from STL for a convenient, economical ride to downtown St. Louis in about 40 minutes.

Read more about STLby Taryn White
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 Cancún to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Cancún 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 Cancún to St. Louis

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

Find hourly flight availability from Cancún to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 29, 2025.

It’s optimal to fly from Cancún to St. Louis in the morning. By choosing this option you can save up to 53% on the cost of your flight, compared to a flight at noon.

Related info for your journey

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

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

    Flights from Cancun to Lambert-St Louis have been viewed 2 times in the past calendar month.

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

    There are many flights that can get you from Cancún to St. Louis in 7h 59m. Fly via Delta or Aeromexico to get the fastest option. Airlines will cover a distance of 1241 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    Looking at all options, your cheapest flight can be booked for $173. While the most popular route (Cancun - Lambert-St Louis) can be booked for $265 on average, our data indicates $255 when flying from Cancún to St. Louis.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Cancún to St. Louis 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 Cancún to St. Louis?

    Currently, August is the cheapest month in which you can book a flight from Cancún to St. Louis (average of $311). Flying from Cancún to St. Louis in March is currently the most expensive (average of $356). 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
Edwardsville
O'Fallon
Fairview Heights
Maryland Heights
Collinsville
Eureka
Glencoe
St. Peters
Chesterfield
Alton
Farmington
Festus

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