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St. Louis

$148+ 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 9/4. Fares are subject to change and may not be available on all flights or dates of travel.
CUN — STL
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$347
(Priceline)

One-way from

$148
(Cheapflightsfares)

Popular in

January

Cheapest in

April

Average price

$419

Good round-trip deal

$206 or less

Good one-way deal

$210 or less
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. 20% potential increase in price ($118 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($24 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Price to beat on a round-trip flight from Cancun to Lambert-St Louis.
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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 June 12, 2025.

This Priceline deal was found by Cheapflights users on 6/10. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/262:50 pmCUN - STL
Nonstop3h 17mFrontier
Mon 9/2910:22 amSTL - CUN
Nonstop3h 13mFrontier
Deal found 6/10$347
This Delta deal was found by Cheapflights users on 6/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/101:54 pmCUN - STL
1 stop9h 08mDelta
Mon 10/131:30 pmSTL - CUN
1 stop6h 39mDelta
Deal found 6/10$348
This CheapOair deal was found by Cheapflights users on 6/12. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/279:50 amCUN - STL
1 stop24h 02mSpirit Airlines
Sun 8/35:26 pmSTL - CUN
1 stop17h 54mSpirit Airlines
Deal found 6/12$363
This Trip.com deal was found by Cheapflights users on 6/10. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/268:15 amCUN - STL
1 stop7h 43mAeromexico
Mon 9/296:00 amSTL - CUN
1 stop6h 45mAeromexico
Deal found 6/10$376
This Trip.com deal was found by Cheapflights users on 6/10. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/262:50 pmCUN - STL
Nonstop3h 17mMultiple Airlines
Mon 9/297:20 amSTL - CUN
1 stop6h 47mMultiple Airlines
Deal found 6/10$393
This Alaska Airlines deal was found by Cheapflights users on 6/11. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/269:00 amCUN - STL
2 stops15h 56mAlaska Airlines
Fri 1/22:55 pmSTL - CUN
2 stops15h 40mAlaska Airlines
Deal found 6/11$1,342

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 June 12, 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

Fri 9/26

2:50 pm-6:07 pm

Nonstop3h 17m

Lambert-St Louis

Mon 9/29

10:22 am-1:35 pm

Nonstop3h 13m

$347

CancúnSt. Louis

CUN - STL

CUNSTL

Cancun

Fri 10/10

1:54 pm-11:02 pm

1 stop9h 08m

Lambert-St Louis

Mon 10/13

1:30 pm-8:09 pm

1 stop6h 39m

$348

CancúnSt. Louis

CUN - STL

CUNSTL

Cancun

Sun 7/27

9:50 am-9:52 am

1 stop24h 02m

Lambert-St Louis

Sun 8/3

5:26 pm-11:20 am

1 stop17h 54m

$363

CancúnSt. Louis

CUN - STL

CUNSTL

Cancun

Fri 9/26

8:15 am-3:58 pm

1 stop7h 43m

Lambert-St Louis

Mon 9/29

6:00 am-12:45 pm

1 stop6h 45m

$376

CancúnSt. Louis

CUN - STL

CUNSTL

Cancun

Fri 9/26

2:50 pm-6:07 pm

Nonstop3h 17m

Lambert-St Louis

Mon 9/29

7:20 am-2:07 pm

1 stop6h 47m

$393

CancúnSt. Louis

CUN - STL

CUNSTL

Cancun

Thu 9/4

9:31 am-6:32 pm

1 stop9h 01m

$148

CancúnSt. Louis

CUN - STL

CUNSTL

Cancun

Mon 8/18

3:25 pm-9:11 am

1 stop17h 46m

$170

CancúnSt. Louis

CUN - STL

CUNSTL

Cancun

Fri 9/5

12:40 pm-10:02 pm

1 stop9h 22m

$211

CancúnSt. Louis

CUN - STL

CUNSTL

Cancun

Wed 11/5

2:30 pm-4:40 pm

Nonstop3h 10m

$232

CancúnSt. Louis

CUN - STL

CUNSTL

Cancun

Wed 11/5

5:55 pm-10:04 am

1 stop17h 09m

$240

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/12

Showing 1-10 of 13 results
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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 June 12, 2025.

It’s optimal to fly from Cancún to St. Louis in the morning. By choosing this option you can save up to 34% on the cost of your flight, compared to a flight at noon.

Weekly flight availability from Cancún to St. Louis

Explore weekly flight availability from Cancún to St. Louis. 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 June 12, 2025.

The most flights from CUN to STL 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).

Rainfall in St. Louis by month

Plan your trip to St. Louis by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

Temperature in St. Louis by month

Plan your trip to St. Louis by taking into account the average temperature totals by month.

If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. 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 St. Louis. Reviews last updated June 12, 2025.
Southwest
8.0
Very good
4,287 reviews

Food

7.1

Boarding

8.2

Crew

8.6

Entertainment

7.6

Comfort

8.0

Overall

8.0

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
4,287 reviews
Southwest
8.0
Very good
4,287 reviews

Food

7.1

Boarding

8.2

Crew

8.6

Entertainment

7.6

Comfort

8.0

Overall

8.0

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.
Delta
8.0
Very good
7,950 reviews
Southwest
8.0
Very good
4,287 reviews

Food

7.1

Boarding

8.2

Crew

8.6

Entertainment

7.6

Comfort

8.0

Overall

8.0

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.
Aeromexico
7.5
Good
1,706 reviews
Southwest
8.0
Very good
4,287 reviews

Food

7.1

Boarding

8.2

Crew

8.6

Entertainment

7.6

Comfort

8.0

Overall

8.0

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.
United Airlines
7.4
Good
8,790 reviews
Southwest
8.0
Very good
4,287 reviews

Food

7.1

Boarding

8.2

Crew

8.6

Entertainment

7.6

Comfort

8.0

Overall

8.0

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
4,287 reviews

Food

7.1

Boarding

8.2

Crew

8.6

Entertainment

7.6

Comfort

8.0

Overall

8.0

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 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.

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

    Frontier, at $347, was found to be the cheapest airline from Cancún to St. Louis.Alternate airlines to your destination round-trip include Delta and Spirit Airlines. Frontier is priced at 25% lower than the current average price of a flight leaving 3 months from now.

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

    To fly one-way, consider booking your trip with Spirit Airlines, which is currently one of the cheapest options available, starting at $148. Frontier flights start at $170 while deals on Delta start at $211 one-way.

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

    Looking at all options, your cheapest flight can be booked for $163. While the most popular route (Cancun - Lambert-St Louis) can be booked for $348 on average our data indicates $249 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 Cancún?

Book flights to Cancún if you plan to visit one of these locations
O'Fallon
Maryland Heights
Fairview Heights
Collinsville
Eureka
St. Peters
Glencoe
Festus
Alton
Farmington

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