STL - CUN

$131 Find Cheap Flights from St. Louis to Cancún

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 6/19. 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.
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KAYAK searches hundreds of travel sites at once for deals on flights to Cancún

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Cancún.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Cancún.
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Flights Deals

Cheap Flight Deals 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.

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

KAYAK's recommended round-trip deals from the most popular airlines that fly from St. Louis to Cancún.
Discover the best prices for you by selecting your travel dates on KAYAK.
Spirit Airlines Logo
7:37 pm - 11:33 amSTL-CUN
15h 56m1 stop
Spirit Airlines Logo
9:31 am - 6:32 pmCUN-STL
9h 01m1 stop
$290Spirit Airlines
Find Deal
Sat, Jul 26 - Tue, Jul 29
Spirit Airlines Logo
7:37 pm - 8:26 amSTL-CUN
12h 49m1 stop
Spirit Airlines Logo
9:31 am - 6:32 pmCUN-STL
9h 01m1 stop
$292Spirit Airlines
Find Deal
Sat, Jul 26 - Tue, Jul 29
Spirit Airlines Logo
11:28 am - 11:26 amSTL-CUN
23h 58m1 stop
Spirit Airlines Logo
10:00 am - 5:04 pmCUN-STL
7h 04m1 stop
$308Spirit Airlines
Find Deal
Mon, Jun 16 - Fri, Jun 20
Frontier Logo
6:45 am - 10:00 amSTL-CUN
3h 15mnonstop
Frontier Logo
12:37 pm - 3:54 pmCUN-STL
3h 17mnonstop
$376Frontier
Find Deal
Fri, Jul 4 - Thu, Jul 10
Frontier Logo
6:10 am - 9:22 amSTL-CUN
3h 12mnonstop
Frontier Logo
12:37 pm - 4:00 pmCUN-STL
3h 23mnonstop
$378Frontier
Find Deal
Fri, May 16 - Mon, May 19
United Airlines Logo
8:20 am - 2:37 pmSTL-CUN
6h 17m1 stop
United Airlines Logo
3:01 pm - 10:00 pmCUN-STL
6h 59m1 stop
$501United Airlines
Find Deal
Wed, Sep 24 - Mon, Sep 29
United Airlines Logo
8:48 am - 7:20 pmSTL-CUN
10h 32m2 stops
United Airlines Logo
1:43 pm - 8:32 pmCUN-STL
6h 49m1 stop
$526United Airlines
Find Deal
Tue, May 13 - Tue, May 20
Southwest Logo
10:05 am - 1:15 pmSTL-CUN
3h 10mnonstop
Southwest Logo
3:25 pm - 6:30 pmCUN-STL
3h 05mnonstop
$556Southwest
Find Deal
Sun, Jul 13 - Fri, Jul 18
Southwest Logo
7:10 am - 4:00 pmSTL-CUN
8h 50m2 stops
Southwest Logo
4:35 pm - 12:25 amCUN-STL
7h 50m2 stops
$561Southwest
Find Deal
Wed, Sep 3 - Sun, Sep 7
American Airlines Logo
5:13 am - 2:03 pmSTL-CUN
8h 50m1 stop
American Airlines Logo
10:35 am - 5:29 pmCUN-STL
6h 54m1 stop
$581American Airlines
Find Deal
Wed, May 28 - Sun, Jun 1
Expert advice

Expert advice for your flight from St. Louis to Cancún

 
Snippets provided in this section are AI-generated based on a summarization of KAYAK-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.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Airlines
Frontier

Consider the Premium Bundle for priority boarding and extra legroom at a minimal additional cost.


Avoid Basic Fare to ensure seat selection and carry-on inclusion for a more comfortable journey.

Read more about Frontierby Stefanie Waldek
American Airlines

Main Cabin Extra offers early boarding and complimentary drinks, enhancing comfort on longer flights.


Download the American Airlines app for access to inflight entertainment on your personal device.

Southwest

Enjoy two free checked bags, ideal for family travel or extended stays.


Use EarlyBird Check-In for a better boarding position and avoid middle seats.

Read more about Southwestby Blane Bachelor
Airports
STL

For a smoother experience at STL, avoid peak hours in the early morning and afternoon when terminals can get crowded and security lines slow.

Read more about STLby Yulia Denisyuk
CUN

At CUN, book buses in advance to avoid being turned away. They connect to Cancun, Tulum, and Playa del Carmen, but sell out quickly.

Read more about CUNby Brandon Schultz
Our travel experts
Stefanie Waldek

Stefanie Waldek

Expert on Frontier

Stefanie Waldek

Stefanie Waldek

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.

Read more
Harriet Baskas

Harriet Baskas

Expert on American Airlines

Harriet Baskas

Harriet Baskas

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.

Read more
Blane Bachelor

Blane Bachelor

Expert on Southwest

Blane Bachelor

Blane Bachelor

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.

Read more
Yulia Denisyuk

Yulia Denisyuk

Expert on STL

Yulia Denisyuk

Yulia Denisyuk

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.

Read more
Brandon Schultz

Brandon Schultz

Expert on CUN

Brandon Schultz

Brandon Schultz

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.

Read more
Useful Info

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.

Find cheap flights to Cancun
Find cheap flights to Cancun

Planning a trip from St. Louis to Cancún? KAYAK’s data-powered insights will help you find cheap flights. Learn the best time to fly, how early to book your ticket, and other tips to secure great prices.

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 Sunday and more expensive on a Saturday. On your return trip to St. Louis, you should consider flying back on a Monday, and avoid Saturdays for better deals.

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

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 Cancún is April, where tickets cost $450 (return) on average. On the other hand, the most expensive months are March and June, where the average cost of round-trip tickets is $667 and $569 respectively.

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

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 $594, prices are generally cheapest when you fly direct.

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

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 Cancún, you should book around 2 weeks before departure. For the absolute cheapest price, our data suggests you should book 11 weeks before departure.

Good to know

Low seasonAugust
High seasonMarch
Cheapest flight$131
Best time to beat the crowds with an average 2% drop in price.
Most popular time to fly with an average 26% 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 Cancún?

    In the last 3 days, the lowest price for a flight from St. Louis to Cancún was $131 for a one-way ticket and $290 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?

    American Airlines, Aeromexico, and Delta 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 Boeing 737 MAX 8 is the aircraft model that flies most regularly on the St. Louis to Cancun flight 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 Cancún, Southwest or Delta?

    The two airlines most popular with KAYAK users for flights from St. Louis to Cancún are Southwest and Delta. With an average price for the route of $683 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 $558 and an overall rating of 8.0.

  • 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 Cancún

  • Looking for a cheap flight? 25% of our users found flights on this route for $189 or less one-way and $434 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?

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
See more direct flights

Top 5 airlines serving from St. Louis to Cancún

 
See real verified KAYAK customer reviews for airlines flying from St. Louis to Cancún. 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 4294 reviews
8.0Comfort
7.1Food
8.6Crew
7.6Entertainment
8.2Boarding
Airline reviews

It is southwest seat was ok. Not the most comfortable seat

8.0 ExcellentJohn, Apr 2025PVD - FLL
Read more Southwest reviews

It is southwest seat was ok. Not the most comfortable seat

I’ve always loved Southwest. No issues at all. I was flying standby and the gate agent was extremely friendly and helpful. Boarding was smooth and I was able to get a window seat in the emergency exit row. Crew was fantastic! They were very professional and accommodating. We had to divert from our destination due to weather but the flight crew kept everyone at ease and informed us of all pertinent information. Excellent flight

The price of the tickets isn't matching the flight experience. No matter how long the flight is, you're only getting pretzels. The flight attendants looked unkept and over it.

Plz don't take away free bags and free seating

The seats were a bit cramped and worn, but otherwise okay.

I would have liked to arrive on time - not 5 hours late!

After a 3 hour layover in Denver my flight was delayed over 5 hours! No explanation; no assistance; no offer to provide compensation; no one at Southwest was willing to offer any assistance. 8 hours in the Denver airport - ridiculous!

It was a perfect flight in all aspects! Both legs!

Only one drink pass through the cabin for a 4 hour flight. Quite rough and bumpy landing.

Boarding process, crew were good. But the seats were so uncomfortable that was all I could focus on. I literally had to sit forward so that all 3 of us could fit in row. I will try to avoid Southwest in the future for any flights over 60 minutes.

Everything is good except the dinner and breakfast. The sandwich is very delicious. Toilet is clean, I only use one of them. Flight attendants are very nice. 👍👍

A bit rush for transit. Food and entertainment are not available

Boarding was a little difficult. The gate area at O'Hare was very small and crowded due to multiple gates in the area. Could not hear the intercom, so had to rely on signage to see when my group was boarding and the signage was blocked by passengers standing in the gate. Flight was great and we arrived in Montreal on time.

Multiple delays and not straight answer from the United team

For economy, it was very good. Staff was great, they even let some of us change seats for more leg room... Put an empty seat between us which was fantastic for a 12hr flight. Onboard entertainment was excellent, I think over 200 choices of movies/tv/etc The bad was the barely/nonfunctional wifi that cost either $16.99 or 1700 miles (full flight). It was atrocious... Definitely the worst of the last 3 long haul major airlines I was on the last few months.

Stewardess spilled orange juice on my clothes/seat no help no apology just threw napkins at me to clean the mess up. Not Happy.

Smooth flight. Boarding was chaotic. Could not hear the gate agent over the intercom. People were lined up in the wrong lines. Groups one and two were told to board through line one and group 3 through line 2. All very confusing. Once in the air, the flight was smooth. There was no entertainment option on this aircraft, even though it was a larger aircraft.

The plane pushed back from the gate on time. However, it stopped on the ramp, and we waited for over 20 minutes before the aircraft pulled back to the gate. Apparently, something of importance had to be removed from the aircraft by the gate agent. I found this to be odd. The delay was not significant, but I felt that whatever was on the aircraft that had to be taken off, should’ve been done before we pushed back from the gate.

I didn’t get on plane. Passport being processed by consulate with visa application. Tried to cancel through underpricer after purchasing cacelling for any reason. No dice, they are thieves.

Electric plugs didn't work. Entertainment system wasn't working

Several delays. Next flight was worse. Did not arrive home until 2am PT

Very helpful ground crew after an earlier flight delay and being rebooked on a different flight.

Everything about the flight was lovely…We left early, arrived early, cabin crew were efficient and helpful. Flight was easy and most pleasant.

First world problems, but still… We were seated in first class and asked for a cocktail on a very short, 50 minute flight. After our drink order was taken, a half hour went by, and we noticed that every other person in the small plane had been served except for us. We got up to ask about it, the drinks finally came, then were taken away three minutes later since the flight was so short. Really strange situation, on the other hand, we were in Utah.

We missed our flight. The boarding pass had the wrong gate and by the time we received the text from Kayak, our flight was already gone. I’ll never use Kayak again and will go direct to the airlines in the future.

Boarding took forever, the plane was cramped and cold, and the seatbelt song came on constantly throughout the red eye flight with a loud pre-recorded message playing each time

Cabin felt crammed Snacks are lame But crew was super efficient getting us out on time despite delay

Took off on time and successfully avoided weather that looked to be a problem along the way

There were five broken seats on the plane. The crew was very rude in telling people they had to get off the plane and get a flight the next day. No call for volunteers, but telling people they had to get off. One woman was flying with her elderly mother and daughter and was told she had to leave or all three had to leave. Fortunately, a volunteer offered to stay. The situation was handled poorly.

The flight to Tokyo AA61 took off about two hours late, but then had to turn back. By that time the crew had to be replaced. Then they kept promising to take off in an hour, then in 3, then switch to the next day.

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

The check-in is either at a kiosk that didn’t allow me to check-in because my middle name was not on the reservation or at an agent that cost $15.

Liked on time, rear entry and exit from plane Dislike the use of duct tape to repair seat rests

Terrible. And they charged over $400 just for luggage. And threatened that I would loose my flight if I didn’t pay. So I didn’t have another choice but to pay.

They don’t give anything for free you have to pay for everything which it’s expected but at least give out water and a snack as a courtesy for flying with them.

I got to where I needed to go quickly. There were no amenities. And the seats were painful.

The worst. Kayak sent notification at 2am and 10am regarding the delay. Then sends a notification an hour before original depart time that it will depart on time. I had to wait 8 hours at the airport. My family had to pay for lodging in Guadalajara where I was landing for pick up.

They were only able to give me a seat and not my travel companion, she had to fly on a different airline. unacceptable

My experience was good. But it seems that every time I go on Volaris the plane is always full, not sure if because the price is cheaper. And the flight attendants kept hitting my shoulder every time they walked by the aisle with their food cart. I’m 6’4” so I barely fit in the seat next to the aisle. Plus the seat was defective. I had a hard time raising the lever where I rest my left arm. I tried calling the flight attendant 3 times if she could assist me but she was too busy talking in the back with her fellow flight attendants. Finally after 20 mins she looked my way and she too struggled to fix the problem but she finally raised it so I could get out of my seat.

Stood inside the plane for more than an hour before take off

The reps working at the airport counter were dumber than a second coat of paint.

My costume jewelry was stolen out of my bag. Got to airport and my bag weighed 45 pounds- 5 pounds over cost me $100 Long lines in tier one. No entertainment No WiFi no free drinks or snacks

Not very good. Paid in excess of $400 for assigned seating for my family and that was not provided. I want that money back.

The seats were hard molded plastic covered in plastic vinyl. And the scam to charge people extra to sit together. Don’t they know we can just ask someone to trade seats. And watching the staff separate young children from parents… super classy. We had to guilt them into offering up our seats. This companies policies suck. Don’t give them your money.

The seats were awful, hard plastic covered in sheet vinyl. The airline tries to scam you into paying extra to get seat together when the flight wasn’t full. They were going to separate a family with young children but my wife who had a row to herself gave up her seat so the young mom could be with her young boys. I’m never giving this airline my money again.

It was a short flight so no food or entertainment….

Seats are uncomfortable but price is good. Guess I can put up with misery for four hours.

I’ve never traveled on Frontier before. If you want basic, no frills, friendly service at great prices then give them a fly!

Cancelled and declined to find alternatives Earlier flight is 2 days later Sent the cancellation notification very late, wish I knew earlier would have stayed to watch the Miami open final game Very disappointing service

The worst flight of my life. Never will I fly frontier again

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

Information on your arrival and departure airports

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