To Cancún

Cheap Flights from St. Louis to Cancún

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Deals from

St. Louis

RatePunk searches hundreds of travel sites at once for deals on flights to Cancún

Prices updated 24 days ago

486,190 searches this week

171 airlines compared

80%+ AI score for best value

Fares are subject to change and may not be available for all dates. (Data last updated May 29, 2026.)

Today’s best flight deals from St. Louis to Cancún

Explore current cheapest deals departing from St. Louis to Cancún

Round trip

Sort by: Cheapest

August 9 - August 14

Cheapest

Earliest

STL - Cancún

$399

$364

Round trip

October 4 - October 7

Cheapest

STL - Cancún

$626

$364

Round trip

November 9 - November 20

Cheapest

STL - Cancún

$547

$364

Round trip

November 3 - November 10

Cheapest

STL - Cancún

$566

$364

Round trip

November 4 - November 11

Cheapest

STL - Cancún

$568

$364

Round trip

November 4 - November 12

Cheapest

STL - Cancún

$566

$364

Round trip

August 10 - August 21

STL - Cancún

$358

$365

Round trip

September 14 - September 25

STL - Cancún

$381

$365

Round trip

September 21 - September 24

STL - Cancún

$433

$365

Round trip

October 18 - October 21

Best

STL - Cancún

$645

$365

Round trip

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Route Intelligence — 486,190 Searches this Week

Insights for flights from St. Louis to Cancún

For travelers planning cheap flights from St. Louis to Cancún, May stands out as the most affordable month, with a median fare of $273. September is another economical option, showing a median fare of $275, while April offers flights at a median of $317. These months present the best opportunities for budget-conscious travelers.

Fares for this route typically range from $407–$1190, with a median of $511. Right now, current fares are below the typical level, which is favorable for travelers. Only 4% of recent fares were classified as a good price, indicating that finding exceptional deals can be challenging, though new deals appear almost daily.

When considering the journey from St. Louis to Cancún, most itineraries connect at least once, with only 32.4% of recent fares being non-stop. For connecting flights, the typical number of stopovers is 2, which can significantly extend travel time.

A typical journey from St. Louis to Cancún, including connections, takes approximately 14h 0m. This duration reflects the prevalence of connecting itineraries, as direct flights are less common on this route.

The distance between St. Louis and Cancún is 1998 kilometers, classifying it as a medium-haul flight. This distance typically involves several hours in the air, often with layovers.

How much is a round trip from St. Louis to Cancún

Regular price: $337 - $467

Prices for flights from St. Louis to Cancún are currently within the regular range.

The regular price range for this route is between $337 and $467. The current lowest deal is $363 with American Airlines, for travel from Aug 9 to Aug 14.

now $363

Low $337

High $467

The cheapest time to fly from St. Louis to Cancún

Flights from St. Louis to Cancun are cheapest in May, with a median price of $273. The most expensive month to fly is March, with a median price of $1554. Prices are generally lower from February to September.

May

Cheapest

Flights from $273

March

Most Expensive

Flights from $1,554

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Direct flights from St. Louis to Cancún

Southwest Airlines

Last-minute flights going from St. Louis to Cancún

Thu, Jun 18

⌛ Last-Minute

STL - Cancún

St. Louis (STL) - Cancún (CUN)

Frontier Airlines

$784

$529

One-way

Thu, Jun 18

⌛ Last-Minute

STL - Cancún

St. Louis (STL) - Cancún (CUN)

Air Canada

$779

$547

One-way

Fri, Jun 19

⌛ Last-Minute

STL - Cancún

St. Louis (STL) - Cancún (CUN)

Frontier Airlines

$786

$526

One-way

Fri, Jun 19

⌛ Last-Minute

STL - Cancún

St. Louis (STL) - Cancún (CUN)

Air Canada

$780

$568

One-way

Sat, Jun 20

⌛ Last-Minute

STL - Cancún

St. Louis (STL) - Cancún (CUN)

Air Canada

$630

$493

One-way

Sat, Jun 20

⌛ Last-Minute

STL - Cancún

St. Louis (STL) - Cancún (CUN)

Air Canada

$676

$504

One-way

Biggest price drops on these dates for flights from St. Louis to Cancún

3 nights

Oct 18 - Oct 21

$645 → $365

43%

3 nights

Oct 4 - Oct 7

$626 → $364

42%

2 nights

Jun 19 - Jun 21

$786 → $526

33%

3 nights

Jun 18 - Jun 21

$784 → $529

33%

Popular Airports to fly from St. Louis to Cancún

St. Louis - Cancún route insights

💸 Price insights

Recent fares are below the typical level.

Recent fares from St. Louis to Cancún are below the typical level, with a median of $511.

📅 Best time to fly

May is historically the cheapest month to fly.

Historically, May is the cheapest month to fly from St. Louis to Cancún, with a median price of $273.

⏱️ Flight duration

Flights typically take 14h 0m.

The median flight duration from St. Louis to Cancún is 14h 0m, with connecting flights dominant.

✈️ Airlines & availability

Flights are frequent, with deals appearing daily.

Deals for flights from St. Louis to Cancún appear frequently, averaging 1.03 deals per day.

🏆 Airline highlight

Southwest Airlines offers direct flights.

Southwest Airlines offers direct flights from St. Louis to Cancún, providing a convenient option.

🎯 Booking tip

Consider booking during May for the best prices.

For the best prices, consider booking your flight from St. Louis to Cancún during May.

St. Louis main airports to depart from

St. Louis Lambert International (STL)

Cheapest

St. Louis Lambert International is a great option for flights from St. Louis to Cancún.

📍 ~20 km from St. Louis (reachable by car or train)

💸 Flights from ~$363

Cancún main airports to arrive at

Cancún International (CUN)

Cheapest

Cancún International Airport is a convenient arrival choice for your trip to Cancún.

📍 ~15 km from Cancún (reachable by car)

💸 Flights from ~$363

Airports nearby Cancún used as alternative

Tulum International Airport (TQO)

Tulum International Airport is a new international gateway with modern facilities, useful for accessing the Riviera Maya.

📍 ~135 km from destination city (reachable by car)

💸 Flights from ~$505

Cozumel International (CZM)

Cozumel International is a reliable alternative for travelers staying in the Riviera Maya with international flights.

📍 ~70 km from destination city (reachable by ferry)

💸 Flights from ~$580

Mérida International (MID)

Cheapest

Mérida International is a major regional hub offering excellent domestic and several international routes.

📍 ~300 km from destination city (reachable by car or bus)

💸 Flights from ~$399

Chetumal International (CTM)

Chetumal International is useful for domestic Mexican connections and the southern part of Quintana Roo.

📍 ~370 km from destination city (reachable by car)

💸 Flights from ~$522

Philip S. W. Goldson International (BZE)

Philip S. W. Goldson International is a major international hub for travelers heading south of the Mexican border.

📍 ~460 km from destination city (reachable by car)

💸 Flights from ~$492

Business & First Class Flight Deals to Cancún

Cancún, Mexico

42% AI deal score

$5,998

Frequently Asked Questions About Flights to Cancún

Historically, the best prices for flights from St. Louis to Cancún are found when booking 14-27 days in advance. During this period, the average price was $348. Booking 28-59 days out typically saw an average price of $527, while flights booked 60+ days in advance were significantly higher, averaging $1042. These trends are based on data from the trailing 90 days.

Based on data from the trailing 90 days, a good price for a flight from St. Louis to Cancún is typically around $407 or less. The median price for this route was $511. Prices can vary, with 75% of flights costing up to $1190.

Historically, May and September have offered the lowest median prices for flights from St. Louis to Cancún, with median prices of $273 and $275 respectively. April also presented a relatively low median price of $317. Across the trailing quarter, the annual median price for this route was $511, indicating that certain months offer substantial savings.

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