CUN - STL

$217 Find Cheap Flights from Cancun to St. Louis - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Cancún to St. Louis departing on 8/22. 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

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Everything you should know

Cheapest round-trip
$382
Air Canada
Thu 9/17Thu 9/24
CUN - STL • 1 stop
Cheapest non-stop
$708
Frontier
Sun 8/9Sun 8/16
CUN - STL • Non-stop
Advice from real travelers
AI-powered summary based on content written by travel experts. AI can make mistakes.
Frontier Economy Bundle adds a carry-on and seat choice; Premium Bundle adds legroom.
Southwest includes a free carry-on; its cancellation policy allows late changes.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
Cheapest • from $382 (round-trip)
Best reviews • 5.6 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
You can fly direct with Frontier and Southwest. Average duration is 3h 09m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
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Flight Deals
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Expert advice
Flight Deals

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

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Cancún to St. Louis 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 Cancún to St. Louis

Thu, Sep 17 - Thu, Sep 24
Air Canada Logo
9:05 pm - 2:00 pm
CUN
-
STL
16h 55m
1 stop
Air Canada Logo
8:55 am - 8:10 pm
STL
-
CUN
11h 15m
1 stop
$382Air Canada
Thu, Sep 17 - Thu, Sep 24
Air Canada Logo
9:05 pm - 2:00 pm
CUN
-
STL
16h 55m
1 stop
Air Canada Logo
8:55 am - 8:10 pm
STL
-
CUN
11h 15m
1 stop
$383Air Canada
Thu, Sep 24 - Mon, Sep 28
United Airlines Logo
3:38 pm - 10:59 pm
CUN
-
STL
7h 21m
1 stop
United Airlines Logo
5:10 am - 12:58 pm
STL
-
CUN
7h 48m
1 stop
$393United Airlines
Thu, Sep 24 - Mon, Sep 28
United Airlines Logo
1:43 pm - 10:30 pm
CUN
-
STL
8h 47m
1 stop
United Airlines Logo
7:01 pm - 10:06 am
STL
-
CUN
15h 05m
2 stops
$393United Airlines
Thu, Aug 27 - Mon, Aug 31
Aeromexico Logo
2:10 pm - 11:58 pm
CUN
-
STL
9h 48m
1 stop
Aeromexico Logo
6:00 am - 8:32 pm
STL
-
CUN
14h 32m
2 stops
$393Aeromexico
Thu, Aug 27 - Mon, Aug 31
Aeromexico Logo
3:22 pm - 11:58 pm
CUN
-
STL
8h 36m
1 stop
Aeromexico Logo
6:00 am - 2:22 pm
STL
-
CUN
8h 22m
1 stop
$393Aeromexico
Thu, Sep 24 - Mon, Sep 28
United Airlines Logo
3:38 pm - 10:59 pm
CUN
-
STL
7h 21m
1 stop
United Airlines Logo
5:10 am - 12:58 pm
STL
-
CUN
7h 48m
1 stop
$394United Airlines
Thu, Aug 27 - Mon, Aug 31
Aeromexico Logo
2:10 pm - 11:58 pm
CUN
-
STL
9h 48m
1 stop
Aeromexico Logo
6:00 am - 8:32 pm
STL
-
CUN
14h 32m
2 stops
$394Aeromexico
Sun, Aug 9 - Sun, Aug 16
Frontier Logo
10:17 am - 8:57 am
CUN
-
STL
22h 40m
2 stops
Frontier Logo
6:34 pm - 1:53 pm
STL
-
CUN
19h 19m
1 stop
$650Frontier
Sun, Aug 9 - Sun, Aug 16
Frontier Logo
11:04 am - 2:23 pm
CUN
-
STL
3h 19mnonstop
Frontier Logo
8:08 pm - 12:49 pm
STL
-
CUN
16h 41m
1 stop
$656Frontier
Booking Insights

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

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

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

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

For Cancun to St. Louis, Saturday is the cheapest day to fly on average and Sunday is the most expensive. Flying from St. Louis back to Cancun, the best deals are generally found on Wednesday, with Thursday being the most expensive.

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

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.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 2 stops layover the cheapest option at $373 on average.

Expert advice

Expert advice for your flight from Cancún to St. Louis

 
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
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.

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.

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

Cheapest flight

$217
Flight from Cancun to St. Louis

When to book flights from Cancún to St. Louis

Are your dates flexible? Find out the best times to travel from Cancún to St. Louis 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 Cancun to St. Louis

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

    In the last 5 days, the lowest price for a flight from Cancun to St. Louis was $217 for a one-way ticket and $382 for a round-trip.

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

    Yes, you'll most likely have to show a valid passport before boarding the plane in Cancun and on arrival in St. Louis.

  • Which airports will I be using when flying from Cancun to St. Louis?

    Cancun airport is called Cancun and the only airport in St. Louis is Lambert-St Louis.

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

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

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

    The Airbus A321neo is the aircraft model that flies most regularly on the Cancun to St. Louis flight route.

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

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

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

    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 Cancun to St. Louis.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis from Cancun 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 Cancun to St. Louis?

    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 St. Louis with an airline and back to Cancun with another airline. Booking your flights between Cancun and STL 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 Cancun to St. Louis?

    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 St. Louis from Cancun 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 Cancun to St. Louis

  • Looking for a cheap flight? 25% of our users found flights on this route for $262 or less one-way and $550 or less round-trip.

Prefer to fly direct from Cancun to St. Louis?

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

Direct departures

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

Direct returns

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

Reviews of the top airline flying from Cancún to St. Louis

 
See real verified KAYAK customer reviews for airlines flying from Cancun to St. Louis. 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 Cancún to St. Louis? 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.
5.6
FrontierOverall score based on 2749 reviews
6.6Crew
4.3Entertainment
5.4Comfort
4.5Food
5.9Boarding
Airline reviews

Great except upon arrival it took them a long time to open the doors

8.0 ExcellentAnonymous, Jul 2026
TYS - DEN
Read more Frontier reviews

Great except upon arrival it took them a long time to open the doors

Frontier feels like a family I Worked for Eastern Airlines back in the day and I felt the family vibe that I had then. Thank you

Terrible. Delayed my family flight for several hours affecting family plans

Tiny seats, no entertainment, no amenities, delays, they charge for carry on and their allowed personal item is smaller than in other airlines.

The seats are tiny and they don’t recline. The planes are dirty and very small. You have to pay for carry on and even the personal item that you’re allowed is smaller than with other airlines. Flights are usually delayed and there’s no screens or any amenities or entertainment.

Zero issues with this flight. Crew was outstanding and flight was super. Plane was clean and fine. The seats need more padding and water should be provided without cost. I recognize it's Frontier but there are some things that should still be part of the flight. But still very satisfied with the experience and quality.

Very delayed with little to no communication from the captain or flight crew. All announcements made were not audibly understood by passengers. Very poor communication. After arrival it took approximately 20 minutes to get a jet bridge to the plane.

I didn’t have any food or check out the entertainment so there should be ‘not applicable’ option. Instead I chose ‘okay’. Anyway, this was my first ever Frontier flight! I was pleased with the new options for Zone1 (exit row seat, carryon included, first to board, etc) and was surprised at seat comfort from the stories I’ve heard/read.

The experience was terrible. The flight boarded late, then after leaving the gate the plane had had to return to the gate for fuel. After 2 hours on the plane, the flight was canceled. The reasons given for the cancelation didn't sound truthful. and different reasons were given. My 15 year old daughter was flying alone on this flight. When they all disembarked the plane she kept asking the crew what she was supposed to do. No one even gave her the courtesy of a response. No one. It took another 4.75 hrs to be out of customs and baggage. She was re-booked the following day. That flight departed 2 hours late. After all of that, they offered a measly $100 flight voucher with an expiry date of 3 months! All in all a terrible experience. We won't be using Frontier again in the future.

There was an extra, unaccounted for passenger on the plane that delayed take off by 1.5 hours (which we boarded for 0.5 hours later than scheduled), ultimately was never found nor removed, then the plane diverted a storm and added another 0.5 hours to the flight, turning this 3.5 hour flight into a 6 hour flight.

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

Information on your arrival and departure airports