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

Within the past month, 30 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 15h 55m. Delta provides one of the quickest options available for as low as $362. There are 1241 mi between St. Louis and Cancún.

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 Aeromexico, starting at $174 and $196 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 $142 on Frontier. Other airlines that offer cheap prices include Delta from $164 and United Airlines from $173 one-way.

Weekly flight availability from St. Louis to Cancún

The most flights from STL to CUN are scheduled on a Friday (3 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (1 on average).

In terms of precipitation, rainfall in Cancún ranges from 1.1 - 11.1 inches per month. October is typically the wettest month, when rainfall can reach 11.1 in. April is typically the driest time to visit Cancún when rainfall is around 1.1 in.

If weather is an important factor for your trip to Cancún, 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 86.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 75.2 F).

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

Looking at all options, your cheapest flight can be booked for $83. While the most popular route (Lambert-St Louis - Cancun) can be booked for $290 on average, our data indicates $302 when flying from St. Louis to Cancún.

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 (93%), Southwest (89%) or American Airlines (50%) as they are the most reliable in getting you off to your destination on time.

What are the most popular airlines that fly from St. Louis to Cancún?

Before booking your flight from St. Louis to Cancún check out the most popular airlines for this route: Frontier, Southwest or Volaris.

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.

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.

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.

$118+ Flights from St. Louis to Cancún

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Find cheap flights from St. Louis to Cancún with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Lambert-St Louis to Cancun are usually found in September or October, booked 41 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 December 8, 2025.

Sat 12/136:00 amSTL - CUN

Nonstop3h 23mFrontier

Thu 12/1812:26 pmCUN - STL

Nonstop3h 21mFrontier

Deal found 12/6

$291

Sat 12/66:00 amSTL - CUN

Nonstop3h 23mFrontier

Fri 12/1211:28 amCUN - STL

Nonstop3h 22mFrontier

Deal found 12/5

$316

Sun 12/146:00 amSTL - CUN

Nonstop3h 23mMultiple Airlines

Sun 12/2112:26 pmCUN - STL

Nonstop3h 21mMultiple Airlines

Deal found 12/7

$317

Mon 12/84:05 pmSTL - CUN

1 stop17h 45mMultiple Airlines

Tue 12/1611:28 amCUN - STL

Nonstop3h 22mMultiple Airlines

Deal found 12/6

$324

Sat 12/136:00 amSTL - CUN

Nonstop3h 23mFrontier

Sat 12/2010:07 amCUN - STL

1 stop24h 33mFrontier

Deal found 12/6

$333

Sat 12/64:05 pmSTL - CUN

1 stop17h 45mMultiple Airlines

Fri 12/1211:28 amCUN - STL

Nonstop3h 22mMultiple Airlines

Deal found 12/5

$340

Sun 12/1410:42 amSTL - CUN

1 stop26h 06mFrontier

Sun 12/214:58 pmCUN - STL

1 stop18h 04mFrontier

Deal found 12/7

$357

Sun 12/77:05 amSTL - CUN

1 stop13h 15mDelta

Thu 12/118:00 amCUN - STL

1 stop6h 16mDelta

Deal found 12/6

$365

Sun 12/74:05 pmSTL - CUN

1 stop17h 45mMultiple Airlines

Sat 12/1311:28 amCUN - STL

Nonstop3h 22mMultiple Airlines

Deal found 12/6

$369

Best flights from St. Louis to Cancún
Discover carefully curated flight deals from St. Louis to Cancún that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 8, 2025.

Sat 1/105:00 pmSTL - CUN

1 stop15h 55mDelta

Wed 1/148:00 amCUN - STL

1 stop7h 48mDelta

Deal found 12/7

$362

Tue 1/139:59 amSTL - CUN

1 stop5h 36mDelta

Fri 1/161:43 pmCUN - STL

1 stop8h 00mDelta

Deal found 12/7

$362

Sat 1/105:00 pmSTL - CUN

2 stops18h 00mDelta

Fri 1/163:13 pmCUN - STL

1 stop9h 26mDelta

Deal found 12/7

$363

Mon 2/26:35 amSTL - CUN

1 stop6h 25mDelta

Wed 2/44:25 pmCUN - STL

1 stop8h 00mDelta

Deal found 12/5

$371

Tue 1/276:35 amSTL - CUN

1 stop6h 25mDelta

Fri 1/3011:15 amCUN - STL

2 stops13h 22mDelta

Deal found 12/8

$371

Sun 2/16:00 amSTL - CUN

2 stops11h 47mDelta

Thu 2/55:45 pmCUN - STL

1 stop6h 52mDelta

Deal found 12/6

$371

Mon 1/127:10 amSTL - CUN

1 stop5h 53mDelta

Thu 1/1512:05 pmCUN - STL

2 stops12h 34mDelta

Deal found 12/8

$376

Thu 1/86:55 pmSTL - CUN

2 stops16h 05mDelta

Fri 1/164:40 pmCUN - STL

1 stop7h 59mDelta

Deal found 12/6

$407

Last-minute flights from St. Louis to Cancún
Discover last-minute flight deals from St. Louis to Cancún. Data last updated December 8, 2025 and is based on user searches.

Sat 1/106:00 amSTL - CUN

Nonstop3h 23mFrontier

Wed 1/141:01 pmCUN - STL

Nonstop3h 28mFrontier

Deal found 12/6

$283

Sun 1/116:00 amSTL - CUN

Nonstop3h 23mFrontier

Wed 1/141:01 pmCUN - STL

Nonstop3h 28mFrontier

Deal found 12/6

$263

Sun 1/115:11 pmSTL - CUN

1 stop15h 02mMultiple Airlines

Wed 1/141:01 pmCUN - STL

Nonstop3h 28mMultiple Airlines

Deal found 12/6

$280

Sun 1/116:00 amSTL - CUN

Nonstop3h 23mFrontier

Fri 1/161:01 pmCUN - STL

Nonstop3h 28mFrontier

Deal found 12/6

$285

Mon 1/126:00 amSTL - CUN

Nonstop3h 23mFrontier

Thu 1/151:01 pmCUN - STL

Nonstop3h 28mFrontier

Deal found 12/7

$284

Tue 1/139:44 amSTL - CUN

Nonstop3h 31mFrontier

Wed 1/141:01 pmCUN - STL

Nonstop3h 28mFrontier

Deal found 12/6

$268

One-way flights from St. Louis to Cancún
Search for one-way flight options from St. Louis to Cancún. Find affordable one-way fares based on user searches. Data last updated December 8, 2025.

Sun 12/146:00 amSTL - CUN

Nonstop3h 23mFrontier

Deal found 12/7

$118

Mon 3/26:00 amSTL - CUN

Nonstop3h 23mFrontier

Deal found 12/8

$122

Sun 1/116:00 amSTL - CUN

Nonstop3h 23mFrontier

Deal found 12/7

$123

Sun 1/255:42 pmSTL - CUN

1 stop14h 31mMultiple Airlines

Deal found 12/8

$125

Mon 1/126:00 amSTL - CUN

Nonstop3h 23mFrontier

Deal found 12/6

$126

Mon 2/235:11 pmSTL - CUN

1 stop15h 07mMultiple Airlines

Deal found 12/6

$130

Tue 12/166:00 amSTL - CUN

Nonstop3h 23mFrontier

Deal found 12/5

$140

Sat 2/286:00 amSTL - CUN

Nonstop3h 23mFrontier

Deal found 12/7

$143

Sat 1/248:22 pmSTL - CUN

1 stop17h 58mFrontier

Deal found 12/8

$146

Tue 2/177:00 amSTL - CUN

Nonstop3h 24mFrontier

Deal found 12/7

$147

Tue 1/66:00 amSTL - CUN

Nonstop3h 23mFrontier

Deal found 12/7

$148

Find flight deals from St. Louis to Cancún

Most accurate provider	CheapOair 3 stars
Most trusted provider	CheapOair 3 stars
Round-trip from	$263 (Super.com)
One-way from	$118 (Kiwi.com)
Popular in	March
Cheapest in	September
Average price	$448
Good round-trip deal	$317 or less
Good one-way deal	$186 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. 9% potential increase in price ($50 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease ($16 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in December 2025

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

Fly from

Fly to

Route

Depart

Return

Price

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Sat 1/10

5:00 pm-9:55 am

1 stop15h 55m

Cancun

Wed 1/14

8:00 am-2:48 pm

1 stop7h 48m

$362

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Tue 1/13

9:59 am-4:35 pm

1 stop5h 36m

Cancun

Fri 1/16

1:43 pm-8:43 pm

1 stop8h 00m

$362

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Sat 1/10

5:00 pm-12:00 pm

2 stops18h 00m

Cancun

Fri 1/16

3:13 pm-11:39 pm

1 stop9h 26m

$363

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Mon 2/2

6:35 am-2:00 pm

1 stop6h 25m

Cancun

Wed 2/4

4:25 pm-11:25 pm

1 stop8h 00m

$371

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Tue 1/27

6:35 am-2:00 pm

1 stop6h 25m

Cancun

Fri 1/30

11:15 am-11:37 pm

2 stops13h 22m

$371

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Sun 2/1

6:00 am-6:47 pm

2 stops11h 47m

Cancun

Thu 2/5

5:45 pm-11:37 pm

1 stop6h 52m

$371

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Mon 1/12

7:10 am-2:03 pm

1 stop5h 53m

Cancun

Thu 1/15

12:05 pm-11:39 pm

2 stops12h 34m

$376

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Thu 1/8

6:55 pm-12:00 pm

2 stops16h 05m

Cancun

Fri 1/16

4:40 pm-11:39 pm

1 stop7h 59m

$407

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Tue 12/30

6:00 am-3:20 pm

1 stop8h 20m

$169

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Tue 12/16

6:39 am-2:00 pm

1 stop6h 21m

$169

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/6

Showing 1-10 of 17 results

Compare providers for flights from St. Louis to Cancún

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 December.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy2 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*1 star
eDreams	Price Accuracy3 stars	Trust Score*3 stars
AranGrant	Price Accuracy2 stars	Trust Score*3 stars
CheapOair	Price Accuracy3 stars	Trust Score*3 stars
Cheapflightsfares	Price Accuracy3 stars	Trust Score*2 stars
Kiwi.com	Price Accuracy3 stars	Trust Score*3 stars
Priceline	Price Accuracy1 star	Trust Score*3 stars
Mytrip	Price Accuracy3 stars	Trust Score*3 stars
JustAirTicket	Price Accuracy-	Trust Score*1 star

*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

Prices

Airlines

How far ahead should I book a flight from St. Louis to Cancún?

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 41 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 $158). Flying from St. Louis to Cancún in June is currently the most expensive (average of $231). 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?

Unlike at noon, when flights are generally more expensive, you can save up to 41% on flights from St. Louis to Cancún by exploring options for tickets in the evening.

What is the cheapest day to fly from St. Louis to Cancún?

Travelers seeking maximum savings on their St. Louis to Cancún flight should consider departing on Sunday evenings when fares are most often at their lowest. Tuesday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

The best insider tips for St. Louis to Cancún flights

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.

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.

Our travel experts

Taryn White

Expert on STL

Ramsey Qubein

Expert on CUN

Reviews of airlines servicing Cancún

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

7.9

Good

4,252 reviews

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

7.9

Good

4,252 reviews

Southwest

7.9

Good

4,252 reviews

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

9,089 reviews

Southwest

7.9

Good

4,252 reviews

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

11,043 reviews

Southwest

7.9

Good

4,252 reviews

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

6.7

Okay

1,156 reviews

Southwest

7.9

Good

4,252 reviews

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

5.8

Fair

3,085 reviews

Southwest

7.9

Good

4,252 reviews

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

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, 30 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 15h 55m. Delta provides one of the quickest options available for as low as $362. There are 1241 mi between St. Louis and Cancún.
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 Aeromexico, starting at $174 and $196 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 $142 on Frontier. Other airlines that offer cheap prices include Delta from $164 and United Airlines from $173 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 (93%), Southwest (89%) or American Airlines (50%) 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 $83. While the most popular route (Lambert-St Louis - Cancun) can be booked for $290 on average, our data indicates $302 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 $158). Flying from St. Louis to Cancún in June is currently the most expensive (average of $231). 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

Puerto Aventuras

Holbox

Punta Sam

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Alternative routes for St. Louis to Cancún

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Other flights to Cancún

Top 8 airlines flying from St. Louis to Cancún

Airline	Cheapest	Average	Flexibility	On-time
Spirit Airlines	Cheapest$130	Average$293	FlexibilityNo cancel fee	On-time65%
Volaris	Cheapest$175	Average$372	FlexibilityNo cancel fee	On-time79%
Aeromexico	Cheapest$218	Average$493	FlexibilityNo cancel fee	On-timeN/A
Frontier	Cheapest$234	Average$424	FlexibilityNo cancel fee	On-time62%
Delta	Cheapest$315	Average$561	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$330	Average$553	FlexibilityNo cancel fee	On-time69%
American Airlines	Cheapest$448	Average$620	FlexibilityNo cancel fee	On-time71%
Southwest	Cheapest$516	Average$666	FlexibilityNo cancel fee	On-time63%

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$118+ 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 12/14. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from St. Louis to Cancún with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheapflights Tip: The best prices from Lambert-St Louis to Cancun are usually found in September or October, booked 41 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 CancúnExplore 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 December 8, 2025.

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 December 8, 2025.

Find flight deals from St. Louis to Cancún

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Cheapflights Fare Finder

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

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 December.

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.

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?

What is the cheapest month to book a flight from St. Louis to Cancún?

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Reviews of airlines servicing Cancún

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.

Related info for your journey

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Top 8 airlines flying from St. Louis to Cancún

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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 December 8, 2025.