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$204+ 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 9/11. Fares are subject to change and may not be available on all flights or dates of travel.
CUN — STL
Aug 13 — Aug 201
Thu 8/13
Thu 8/20
1 adult, Economy
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Cheap 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 July 14, 2026.

This United Airlines deal was found by Cheapflights users on 7/10. 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.
Thu 8/277:51 am
CUN
-
STL
1 stop6h 24m
United Airlines
Sun 8/306:59 pm
STL
-
CUN
2 stops17h 03m
United Airlines
Deal found 7/10$333
This United Airlines deal was found by Cheapflights users on 7/9. 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.
Sat 10/177:51 am
CUN
-
STL
1 stop6h 19m
United Airlines
Sun 10/185:36 pm
STL
-
CUN
1 stop20h 50m
United Airlines
Deal found 7/9$378
This Delta deal was found by Cheapflights users on 7/12. 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 8/2712:30 pm
CUN
-
STL
1 stop11h 28m
Delta
Sun 8/309:15 am
STL
-
CUN
1 stop5h 07m
Delta
Deal found 7/12$394
This CheapOair deal was found by Cheapflights users on 7/9. 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.
Sat 10/1712:17 pm
CUN
-
STL
Nonstop3h 17m
Frontier
Sun 10/1810:35 am
STL
-
CUN
1 stop27h 56m
Frontier
Deal found 7/9$403
This Southwest deal was found by Cheapflights users on 7/14. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/271:10 pm
CUN
-
STL
Nonstop3h 05m
Southwest
Sun 8/3010:55 am
STL
-
CUN
Nonstop3h 05m
Southwest
Deal found 7/14$444
This United Airlines deal was found by Cheapflights users on 7/12. 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 9/301:12 pm
CUN
-
STL
1 stop7h 04m
United Airlines
Sat 10/35:36 pm
STL
-
CUN
2 stops16h 30m
United Airlines
Deal found 7/12$457
This Aeromexico deal was found by Cheapflights users on 7/12. 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 Aeromexico is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/3012:35 pm
CUN
-
STL
1 stop11h 07m
Aeromexico
Sat 10/310:40 am
STL
-
CUN
1 stop9h 10m
Aeromexico
Deal found 7/12$480

Find 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 July 14, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$333
(United Airlines)

One-way from

$204
(United Airlines)

Good one-way deal

$234 or less
Provider with most accurate pricing for Cancun-Lambert-St Louis flight deals.
Search Deals
Provider most trusted by Cheapflights users for Cancun-Lambert-St Louis flights.
Search Deals
From Cancun to Lambert-St Louis
Search Deals
One-way flight from Cancun to Lambert-St Louis
Search Deals
Price to beat on a one-way flight from Cancun to Lambert-St Louis.
Search Deals

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 July 14, 2026.
Use the filters below to find and compare flights from Cancún to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

CancúnSt. Louis

CUN - STL

CUNSTL

Cancun

Thu 8/27

3:38 pm-8:39 am

1 stop17h 01m

Lambert-St Louis

Sun 8/30

8:00 am-2:26 pm

1 stop6h 26m

$333

CancúnSt. Louis

CUN - STL

CUNSTL

Cancun

Sat 10/17

7:51 am-2:10 pm

1 stop6h 19m

Lambert-St Louis

Sun 10/18

5:36 pm-2:26 pm

1 stop20h 50m

$378

CancúnSt. Louis

CUN - STL

CUNSTL

Cancun

Thu 8/27

3:22 pm-11:58 pm

1 stop8h 36m

Lambert-St Louis

Sun 8/30

7:00 am-6:44 pm

2 stops11h 44m

$394
Quickest round-trip

CancúnSt. Louis

CUN - STL

CUNSTL

Cancun

Thu 8/27

1:10 pm-4:15 pm

Nonstop3h 05m

Lambert-St Louis

Sun 8/30

10:55 am-2:00 pm

Nonstop3h 05m

$444

CancúnSt. Louis

CUN - STL

CUNSTL

Cancun

Wed 9/30

1:12 pm-8:16 pm

1 stop7h 04m

Lambert-St Louis

Sat 10/3

5:36 pm-10:06 am

2 stops16h 30m

$457

CancúnSt. Louis

CUN - STL

CUNSTL

Cancun

Wed 9/30

12:35 pm-11:42 pm

1 stop11h 07m

Lambert-St Louis

Sat 10/3

10:40 am-7:50 pm

1 stop9h 10m

$480
Cheapest one-way

CancúnSt. Louis

CUN - STL

CUNSTL

Cancun

Fri 9/11

7:51 am-11:38 pm

1 stop15h 47m

$204

CancúnSt. Louis

CUN - STL

CUNSTL

Cancun

Wed 9/9

1:12 pm-11:57 am

2 stops22h 45m

$204

CancúnSt. Louis

CUN - STL

CUNSTL

Cancun

Thu 9/10

2:49 pm-12:02 pm

2 stops21h 13m

$204
Quickest one-way

CancúnSt. Louis

CUN - STL

CUNSTL

Cancun

Tue 10/13

7:51 am-10:30 pm

1 stop14h 39m

$235

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/10

Showing 1-10 of 15 resultsSorted by cheapest first
1
2

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 July.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice 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 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.

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 July 14, 2026.

When flying from Cancún to St. Louis, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

The best insider tips for Cancún to St. Louis 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 Cancún to St. Louis 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

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 1 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 8h 36m. Fly via United Airlines or Delta 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 airlines to fly from Cancún to St. Louis one-way?

    To fly one-way, consider booking your trip with Frontier, which is currently one of the cheapest options available, starting at $137. Volaris flights start at $173 while deals on Delta start at $174 one-way.

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Cancún to St. Louis on time: Frontier (85%), Volaris (85%), Southwest (83%).

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

    Looking at all options, your cheapest flight can be booked for $195. While the most popular route (Cancun - Lambert-St Louis) can be booked for $394 on average, our data indicates $246 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.

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
Fenton
Swansea
Fairview Heights
Eureka
Maryland Heights
Collinsville
Wentzville
Glencoe
Chesterfield
Alton
Farmington

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