STL - CUN

$116 Find Cheap Flights from St. Louis to Cancun

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Cancún departing on 5/19. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Cancun

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Cancun.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Cancun.
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Everything you should know

Cheapest round-trip
$333
Typical prices: $685-$439
Frontier
Sat 5/9Sat 5/16
STL - CUN • 2 stops
Cheapest non-stop
$371
Typical prices: $671-$419
Frontier
Wed 5/13Tue 5/19
STL - CUN • Non-stop
Advice from real travelers
AI-powered summary based on content written by travel experts. AI can make mistakes.
Southwest offers two free checked bags for this route.
At CUN, immigration is quick with automated checks.
Expert advice
Expert advice
Expert advice
Expert advice
Nonstop flights
Every day
You can fly direct with Frontier and Southwest. Average duration is 3h 06m
Direct flights
Direct flights
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+1
Direct flights
Direct flights
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When to book
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 16% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 29% price drop
Most popular
Good to know
Good to know
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Good to know
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Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Cancún!
Flight Deals
Booking Insights
Expert advice
Flight Deals

Cheap Flights from St. Louis to Cancún (STL-CUN)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to Cancún that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from St. Louis to Cancún

Sat, May 9 - Sat, May 16
Frontier Logo
8:08 pm - 2:07 pm
STL
-
CUN
17h 59m
2 stops
Frontier Logo
5:07 pm - 12:21 am
CUN
-
STL
7h 14m
1 stop
$333Frontier
Thu, May 14 - Sun, May 17
Frontier Logo
6:55 pm - 2:07 pm
STL
-
CUN
19h 12m
1 stop
Frontier Logo
3:22 pm - 8:55 am
CUN
-
STL
17h 33m
1 stop
$337Frontier
Tue, May 12 - Tue, May 19
Multiple Airlines Logo
7:05 am - 8:10 pm
STL
-
CUN
13h 05m
1 stop
Multiple Airlines Logo
11:13 am - 2:39 pm
CUN
-
STL
3h 26mnonstop
$339Multiple Airlines
Sat, May 9 - Sat, May 16
Frontier Logo
5:27 pm - 2:07 pm
STL
-
CUN
20h 40m
1 stop
Frontier Logo
5:07 pm - 12:21 am
CUN
-
STL
7h 14m
1 stop
$341Frontier
Sat, May 9 - Mon, May 11
Frontier Logo
5:27 pm - 2:07 pm
STL
-
CUN
20h 40m
1 stop
Frontier Logo
3:22 pm - 5:33 pm
CUN
-
STL
26h 11m
1 stop
$347Frontier
Tue, May 12 - Tue, May 19
Multiple Airlines Logo
1:05 pm - 9:50 am
STL
-
CUN
20h 45m
2 stops
Multiple Airlines Logo
11:13 am - 2:39 pm
CUN
-
STL
3h 26mnonstop
$348Multiple Airlines
Tue, Jun 23 - Mon, Jun 29
Frontier Logo
8:08 pm - 12:48 pm
STL
-
CUN
16h 40m
1 stop
Frontier Logo
11:02 am - 6:18 pm
CUN
-
STL
7h 16m
1 stop
$349Frontier
Tue, Jun 23 - Sat, Jun 27
Multiple Airlines Logo
8:08 pm - 12:48 pm
STL
-
CUN
16h 40m
1 stop
Multiple Airlines Logo
10:04 am - 6:34 pm
CUN
-
STL
8h 30m
1 stop
$350Multiple Airlines
Tue, Jun 23 - Fri, Jun 26
Multiple Airlines Logo
8:08 pm - 12:48 pm
STL
-
CUN
16h 40m
1 stop
Multiple Airlines Logo
10:04 am - 6:18 pm
CUN
-
STL
8h 14m
1 stop
$355Multiple Airlines
Sat, May 9 - Mon, May 11
Multiple Airlines Logo
1:05 pm - 9:00 pm
STL
-
CUN
7h 55m
1 stop
Multiple Airlines Logo
3:22 pm - 5:33 pm
CUN
-
STL
26h 11m
1 stop
$362Multiple Airlines
Booking Insights

KAYAK's insights & trends for St. Louis to Cancún flights

Get data-powered insights and trends into flights from St. Louis to Cancún to help you find the cheapest flights, the best time to fly and much more.

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

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from St. Louis to Cancún departing in May.

What’s the cheapest day of the week to fly from St. Louis to Cancun?

The average price of all round-trip flights from St. Louis to Cancún clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to Cancun on a Monday and more expensive on a Saturday. On your return trip to St. Louis, you should consider flying back on a Friday, and avoid Mondays for better deals.

What is the cheapest month to fly from St. Louis to Cancun?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from St. Louis to Cancún, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from St. Louis to Cancun is September, where tickets cost $326 (return) on average. On the other hand, the most expensive months are June and March, where the average cost of round-trip tickets is $570 and $557 respectively.

Can I save money by flying with a layover from St. Louis to Cancun?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of $532, prices are generally cheapest when you fly direct.

How far in advance should I book a flight from St. Louis to Cancun?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from St. Louis to Cancún, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from St. Louis to Cancun, you should book around 2 weeks before departure, which saves you about 16% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 8 weeks before departure.

Expert advice

Expert advice for your flight from St. Louis to Cancún

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Stefanie Waldek

Stefanie Waldek

Expert on Frontier

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Blane Bachelor

Blane Bachelor

Expert on Southwest

Blane Bachelor is a journalist and editor specializing in travel and aviation who writes regularly for top global outlets. Born and raised in Florida, Blane has worked and lived in four countries, including the Netherlands, where she’s currently based with her family. Her favorite way to get to know a new destination is by running or riding a bike around town – or hearing a spooky ghost story about local history. She will always choose the window seat.

Harriet Baskas

Harriet Baskas

Expert on American Airlines

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Yulia Denisyuk

Yulia Denisyuk

Expert on STL

Yulia is a freelance journalist who’s dispatched from 90+ countries. Her work focuses on cultures, adventure trips and air travel, appearing in NatGeo, NYT, CNTraveler, and more. For past assignments, she’s stayed with nomads in Mongolia and learned the art of Imigongo in Rwanda. She’s based in Chicago; in winter she often questions that decision.

Brandon Schultz

Brandon Schultz

Expert on CUN

Brandon Schultz is an award-winning food and travel writer based in New York City. His work has appeared in Forbes, AAA, Thrillist, Travel + Leisure, and The Daily Meal, among many others, and he is the author of 6 books, including 3 cookbooks.

Good to know

Low seasonAugust
Cheapest flight$116
Best time to beat the crowds with an average 5% drop in price.
Most popular time to fly with an average 20% increase in price.
Flight from St. Louis to Cancun

When to book flights from St. Louis to Cancún

Are your dates flexible? Find out the best times to travel from St. Louis to Cancún based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from St. Louis to Cancun

  • How can I get into the city center of Cancun from CUN?

    There is a bus stop in Terminal 2 of CUN where you can catch an ADO bus into the city center of Cancun. This journey will take you approximately 30min. These buses tend to leave the airport about every 30min. From CUN, you can also take a Cancun Shuttle or a Jayride shuttle into the city. This trip will take approximately 20min.

  • Is there a USO lounge at STL?

    Active-duty US military service members and their family members can take advantage of the James S. McDonnell USO at STL. This lounge is open 24h, 7 days a week, every day of the year. It can be found on the lower level of Terminal 1 opposite the M6 baggage claim. Everything in the USO is offered without charge, such as beverages, snacks, computers, laptops, TV, and so much more. There is even an area where you can sleep.

  • Does STL have a chapel or prayer room?

    STL has two inter-faith chapels. One is located in Terminal 1, on the lower level. The other is located near gate E-40. These quiet spaces for reflection and meditation are open every day, for 24h. These rooms, which can be quite places of sanctuary, also provide prayer, prayer rugs, spiritual guidance, religious services, and empathetic listening.

  • How can I fly from STL to CUN?

    Frontier and Southwest operate non-stop flights from STL to CUN. United Airlines and American Airlines are among the carriers that operate one-stop flights. These flights often stop in cities such as Houston (IAH), Charlotte (CLT), or Chicago (ORD).

  • What is the cheapest flight from St. Louis to Cancun?

    In the last 3 days, the lowest price for a flight from St. Louis to Cancun was $116 for a one-way ticket and $333 for a round-trip.

  • Do I need a passport to fly between St. Louis and Cancun?

    Yes

  • Which airlines offer Wi-Fi service onboard planes from St. Louis to Cancun?

    JetBlue, and American Airlines offer inflight Wi-Fi service on the St. Louis to Cancun flight route.

  • Which aircraft models fly most regularly from St. Louis to Cancun?

    The Airbus A321-100/200 is the aircraft model that flies most regularly on the St. Louis to Cancun flight route.

  • Which airline alliances offer flights from St. Louis to Cancun?

    Star Alliance, SkyTeam, and oneworld are the airline alliances operating flights between St. Louis and Cancun, with Star Alliance being the most commonly used for this route.

  • On which days can I fly direct from St. Louis to Cancun?

    There are nonstop flights from St. Louis to Cancun on a daily basis.

  • Which is the best airline for flights from St. Louis to Cancun, Southwest or Delta?

    The two airlines most popular with KAYAK users for flights from St. Louis to Cancun are Southwest and Delta. With an average price for the route of $632 and an overall rating of 8.0, Southwest is the most popular choice. Delta is also a great choice for the route, with an average price of $506 and an overall rating of 7.9.

  • How does KAYAK find such low prices on flights from St. Louis to Cancun?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from St. Louis to Cancun.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from St. Louis to Cancun?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Cancun from St. Louis is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from St. Louis to Cancun?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Cancun with an airline and back to St. Louis with another airline. Booking your flights between St. Louis and CUN can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from St. Louis to Cancun?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Cancun from St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from St. Louis to Cancun

  • Looking for a cheap flight? 25% of our users found flights on this route for $243 or less one-way and $438 or less round-trip.
  • As a part of an arts and culture initiative at the Lambert St. Louis International Airport (STL), Terminal 1 features a piano and a player. As a result, travelers get to enjoy live music as they head through the airport.
  • Parking lots for long-term parking are available in Lots B and D at STL. Complimentary shuttles can take you to your terminal, and these run approximately every 10min. Generally, payment is due at the time that you leave the lot when you have returned from your trip.
  • At STL, traveling mothers can take advantage of lactation suites if they want to breastfeed in private or need to pump while they are in the airport. Each lactation suite is a quiet calm, sanitized space that has a sink, a comfortable chair, a table, an outlet, an ottoman, and a bench. The suites are designed with enough room for luggage, a stroller, and other family members. These lactation suites can be found at Gates A10, E33, and C9.
  • There are many currency exchange counters throughout Cancun International Airport (CUN) in Terminals 2, 3, and 4. You also have the option of exchanging money somewhere in town or online to perhaps get a better exchange rate.
  • CUN has a designated restaurant and waiting area called The Meeting Point, designed specifically for international passengers to meet up with people when they land. There is one located in Terminal 2 and another in Arrival Terminal 3. This is the ideal place to meet someone at the airport once you have arrived.

Prefer to fly direct from St. Louis to Cancun?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Lambert-St Louis to Cancun.
Find which airlines fly direct from Lambert-St Louis Airport to Cancun Airport, which days they fly and book direct flights.

Direct departures

Lambert-St Louis to Cancun

Monday

Frontier,Southwest

Frontier,Southwest

Tuesday

Frontier,Southwest

Frontier,Southwest

Wednesday

Frontier,Southwest

Frontier,Southwest

Thursday

Frontier,Southwest

Frontier,Southwest

Friday

Frontier,Southwest

Frontier,Southwest

Saturday

Frontier,Southwest

Frontier,Southwest

Sunday

Frontier,Southwest

Frontier,Southwest

See more direct flights

Direct returns

Cancun to Lambert-St Louis

Monday

Frontier,Southwest

Frontier,Southwest

Tuesday

Frontier,Southwest

Frontier,Southwest

Wednesday

Frontier,Southwest

Frontier,Southwest

Thursday

Frontier,Southwest

Frontier,Southwest

Friday

Frontier,Southwest

Frontier,Southwest

Saturday

Frontier,Southwest

Frontier,Southwest

Sunday

Frontier,Southwest

Frontier,Southwest

See more direct flights

Reviews of the top 5 airlines serving from St. Louis to Cancún

 
See real verified KAYAK customer reviews for airlines flying from St. Louis to Cancun. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from St. Louis to Cancún? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
SouthwestOverall score based on 4314 reviews
7.5Entertainment
8.6Crew
8.0Comfort
8.1Boarding
7.0Food
Airline reviews

The entire experience from boarding to landing was amazing! The crew were very friendly. Will definitely be back.

10.0 Excellentlarry, Apr 2026
LGB - PHX
Read more Southwest reviews

The entire experience from boarding to landing was amazing! The crew were very friendly. Will definitely be back.

no service at all due to turbulence. they should've at least given us snacks, there were only 10 people on the entire flight.

First time I've had to use the disabled accommodations. And I could not have had a better experience with Southwest, i was having trouble getting from one terminal to another due to my heart failure. And the next thing I know a Southwest agent had made sure. I had a wheelchair at all my flights. Can't thank them enough.

Delayed flight, lack of information, boarding process is a mess as is the carryon luggage causing issues when leaving the plane….just a poor experience.

Comfortable. Easy. No problems. Just wish they had gf options for snacks.

The crew was very kind and made going to Hawaii relaxing and fun to look forward to! Thank you Southwest for a pleasant flight!

This leg was much better, but we did have to have a 3 hour lay o er after coming from a very exhausting hiccup with our flight from BNA to Den

We waited in the airplane for over 45 min for a southwest employee to make the flight. This cause over half the plane to miss their connecting flight in Denver. When we confronted the desk upon arrival, they told us the only flight they had was the next day leaving at 8:50 pm!!! Or they offered to get us to Burbank or LA, but after that we were on our own to get back to Santa Barbara. I paid for a flight from sba to bna bna to sba. My re entry into mom mode has been 💯 rough because of southwest mistake with my flight. And now I’m leaving to Reno tomorrow for a vballl tournament and just discovered that my leg in Vegas has me and my 3 kids on a stand by flight even though I had booked these ticket last year November!! Do better southwest!

Southwest is kind of a slum airline. It’s gotten more expensive over the years for less and less service. I am a Southwest Chase Visa card holder and was forced to choose a seat in the 26th row in the middle seat. However my wife who is a rewards member but doesn’t hold a card or anything else, gets randomly assigned a normally paid seat in row 6! How does that work?

For the first time in a long time, the Wi-Fi actually worked the entire flight! The flight crew was amazing as usual.

Some crew were unfriendly or in some cases just straight up rude.

Booked through Kayak Business, had a seat in middle and towards back due to booking rate, not comfortable.

Was great in general, try to respect time and excuses when slight changes have been made, appreciated!

A long delay. Don't travel late in the day.

Super friendly with lots of drink options an entertainment. Friendly crew.

Standard flight with a drinks and a snack- overall very quick flight. The flight attendants were very strict, bordered on rude.

Outstanding service, efficient & friendly crew, flight was safe, comfortable & on time

United Airline crews were very friendly and very attentive. 12 hours flight was gone like in a shorter one.

Delayed - weather wasn't bad at either end. Also sat on tarmac in ORD.

Food was surprisingly delicious. Space in the seat is horrible when the seating front is reclined. Movie offerings were terrible. Crew was friendly and helpful.

I would like a refund for the extra cost the seat I paid for. An oversized person sat next to me and I couldn’t fit on my seat and had to move to another seat.

Boarding gate at LAX was too crowded—two gates next to one another

The flight was delayed about an hour for a maintenance specialist to approve the maintenance repair

This flight was delayed but it worked in my favor because my Atlanta to Dallas flight was delayed.

This was a hard flight. 3 delays out of OKC (1 on the Tarmac). Delay in Atlanta coming to Dallas. total travel time was the equivalent of driving from OKC to Atlanta.

Like: flights are on time, good boarding process Can improve: planes are old, improve entertainment and make space more comfortable

Had to wait for a gate for a long time, then waited on the run way for a long time before leaving. The actual flights part was good.

The airplane was an old model, the overhead didn’t have enough room for people’s items and made boarding and boarding disappointing and stressful. Crew allowed passengers to bring more than the permitted baggage sizes.

Flying in the United States with the major airlines has become so underwhelming. A 2-3hr flight in most other parts of the world with the major carriers of the area comes with newer, CLEANER aircraft and significantly better in flight service in terms of both staff attitude and a actual meal service.

On time departure and early arrival. Flight attendant very nice.

The flights were on time, the ground crew and on board crews were kind and efficient. The free snacks for Premium+ were good, similar to US First Class snacks. The plane were clean and bright! Complaints? The seats were worn and the seat-back pockets were missing. Overall, I'll book again with Volaris. Ignore the negative social media posts, understand what your fare includes, buy the add ons you need. We had no problems with our personal items and carryons.

Overall a good red eye. Crew chatted very loudly the whole time making it difficult to sleep.

It’s a 2 1/2 hour flight so good and comfort was not my real concern. Safety, easy, fast was what I was looking for. The crews were great, plane was clean, boarding from CBX was fantastic! Definitely traveling this way again.

The money you save flying volaris is not worth it

Is was a good short flight with some turbulence! I would fly Volaris again.

We had boarding passes for the next flight but we could not catch the flight in the small airport just because volaris closed the boarding at the counters an hour before for which we had to sepnd almost 3+ hours to catch next flight. There are hardly anyone who can speak english, but thank God, we have found an young man who could not only speak English but helped us book for the next flight. The air crafts are noisy and scary sometimes to hear that squeeking noises during the take off and during the flight. They do not even offer a cup of coffee for free in flight. The prices are super high and the services are zero. That’s pretty much for this airlines in summary.

The boarding , and it would be nice if they would let us know head of time about flight changes

The fly was 2 hours delayed and the plane was old and dirty. A very umcorfotable flight, which I won't recomend to anyone

The flight was delayed by two hours. I had paid for extended leg room. Due to the delay, the plane was different and I didn't end up having extended leg room. I finally was able to reach Volaris on Whats App and they gave me an airline credit. I wanted a refund to the credit card since I hardly ever fly Volaris. Other than that, it was a very comfortable flight.

Confusion over extra fees. Held up on ramp during boarding. Thin seat cushion. Minimal leg room.

Plane was hot and miserable and the crew was rude!

12 hour delay required getting on and off plane 3 times - would have at least liked to have been offered a snack or drink

They didn’t offer a water, even after I asked

They switched our terminal 3 times and we were delayed for four plus hours!!!

It was an early flight and most people napped/slept and the crew let us which was nice.

The crew acted like they had never done this and kept barking passive aggressive orders at people. + the security line + the delay + sitting on the tarmac for 2 hours + none of the apps or signage updating with correct times

More inflight connection. And leg space is horrible. And the paying for baggage I'd ridiculous!!!

My flight was originally from SAT to MCO connecting from MCO to ORD. We got diverted to ATL and than Frontier staff there was sooo un helpful first they said they couldn’t give us any accommodation since our flight first got delayed that cancelled and now it’s 221am and I am still in ATL since they said they need to create a new flight my final destination is ORD and I have been delayed twice and cancelled. With no real help the frontier app didn’t work no email updates over all such a horrible experience

There's no seats that lean back with little leg space i wad uncomfortable the entire flight. Your charges for extra baggage is despicable and costly!!

Remind customers of the need to have passport or new ID for boarding.

Everything you need to know for your flight from St. Louis to Cancún

Other airlines flying from St. Louis to Cancún

Flights from the other most popular airlines that fly from St. Louis to Cancún according to KAYAK users. Prices are the lowest found on KAYAK over the last 7 days. Price and availability are not guaranteed.