$168+ Cheap flights from St. Louis (STL) to Cancún (CUN)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/9. Fares are subject to change and may not be available on all flights or dates of travel.
STL — CUN
Oct 31 — Nov 71
Round-trip
1 adult, Economy
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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 December or January, booked 41 days in advance, depart on a Wednesday or Tuesday and return on a Thursday
Cheap flight deals from St. Louis to Cancún
Cheapest
Best
Last-minute
One-way
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 October 1, 2026.
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 October 1, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 9/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/176:20 am -
Nonstop3h 14m
Fri 11/2011:44 am -
1 stop6h 56m
Deal found 9/29![Frontier logo]()
$417
This Kiwi.com deal was found by Cheapflights users on 9/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/96:44 pm -
3 stops22h 23m
Thu 11/1212:23 pm -
Nonstop3h 23m
Deal found 9/27![Multiple Airlines logo]()
$419
This Expedia deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/296:20 am -
Nonstop3h 14m
Thu 11/52:51 pm -
1 stop27h 49m
Deal found 10/1![Frontier logo]()
$423
This Kiwi.com deal was found by Cheapflights users on 9/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/212:02 pm -
2 stops22h 02m
Thu 12/1011:28 am -
1 stop24h 49m
Deal found 9/29![Frontier logo]()
$425
This Kiwi.com deal was found by Cheapflights users on 9/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/296:00 am -
Nonstop3h 14m
Thu 12/1011:28 am -
1 stop24h 49m
Deal found 9/29![Frontier logo]()
$434
This Kiwi.com deal was found by Cheapflights users on 9/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/306:00 am -
Nonstop3h 14m
Thu 12/1011:28 am -
1 stop24h 49m
Deal found 9/29![Frontier logo]()
$435
This Cheapflightsfares deal was found by Cheapflights users on 9/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/76:00 am -
Nonstop3h 28m
Fri 12/112:08 pm -
Nonstop3h 25m
Deal found 9/30![Frontier logo]()
$438
This Kiwi.com deal was found by Cheapflights users on 9/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/412:02 pm -
3 stops28h 07m
Thu 12/102:08 pm -
Nonstop3h 25m
Deal found 9/28![Multiple Airlines logo]()
$442
This Kiwi.com deal was found by Cheapflights users on 9/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/114:18 pm -
2 stops29h 29m
Thu 11/192:51 pm -
1 stop27h 49m
Deal found 9/29![Multiple Airlines logo]()
$444
This Kiwi.com deal was found by Cheapflights users on 9/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/106:20 am -
Nonstop3h 14m
Wed 11/115:40 pm -
2 stops49h 00m
Deal found 9/28![Multiple Airlines logo]()
$445
Best flights from St. Louis to CancúnDiscover 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 October 1, 2026.
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 October 1, 2026.
This Delta deal was found by Cheapflights users on 9/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/87:00 am -
1 stop12h 55m
Tue 11/176:49 am -
2 stops18h 07m
Deal found 9/29![Delta logo]()
$506
This Southwest deal was found by Cheapflights users on 9/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/286:00 am -
2 stops7h 15m
Wed 11/48:20 am -
2 stops8h 15m
Deal found 9/30![Southwest logo]()
$551
This Delta deal was found by Cheapflights users on 9/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/87:00 am -
2 stops12h 40m
Thu 11/1912:13 pm -
1 stop10h 29m
Deal found 9/29![Delta logo]()
$506
This Southwest deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/310:30 am -
2 stops8h 15m
Tue 11/1012:35 pm -
1 stop10h 40m
Deal found 10/1![Southwest logo]()
$551
This Delta deal was found by Cheapflights users on 9/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/77:03 am -
1 stop13h 05m
Fri 12/1111:21 am -
2 stops13h 44m
Deal found 9/30![Delta logo]()
$524
This Southwest deal was found by Cheapflights users on 9/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/298:50 am -
Nonstop3h 15m
Tue 2/22:10 pm -
1 stop7h 20m
Deal found 9/27![Southwest logo]()
$614
This Delta deal was found by Cheapflights users on 9/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/57:20 am -
1 stop8h 10m
Mon 2/81:33 pm -
2 stops11h 06m
Deal found 9/29![Delta logo]()
$596
This Delta deal was found by Cheapflights users on 9/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/142:31 pm -
1 stop5h 24m
Sat 11/2112:26 pm -
2 stops12h 30m
Deal found 9/26![Delta logo]()
$596
This Southwest deal was found by Cheapflights users on 9/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/25:35 am -
2 stops10h 45m
Sat 1/910:50 am -
2 stops9h 20m
Deal found 9/28![Southwest logo]()
$695
This Delta deal was found by Cheapflights users on 9/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/177:00 am -
1 stop12h 55m
Wed 10/216:04 am -
2 stops10h 24m
Deal found 9/28![Delta logo]()
$627
This Delta deal was found by Cheapflights users on 9/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/307:20 am -
2 stops11h 40m
Sat 2/61:40 pm -
2 stops10h 38m
Deal found 9/26![Delta logo]()
$668
This Delta deal was found by Cheapflights users on 9/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/137:00 am -
2 stops13h 28m
Tue 10/208:00 am -
2 stops13h 23m
Deal found 9/28![Delta logo]()
$705
Last-minute flights from St. Louis to CancúnDiscover last-minute flight deals from St. Louis to Cancún. Data last updated October 1, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Cancún. Data last updated October 1, 2026 and is based on user searches.
This Expedia deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/296:20 am -
Nonstop3h 14m
Thu 11/52:51 pm -
1 stop27h 49m
Deal found 10/1![Frontier logo]()
$423
This Kiwi.com deal was found by Cheapflights users on 9/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/96:44 pm -
3 stops22h 23m
Thu 11/1212:23 pm -
Nonstop3h 23m
Deal found 9/27![Multiple Airlines logo]()
$419
This Kiwi.com deal was found by Cheapflights users on 9/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/106:20 am -
Nonstop3h 14m
Wed 11/115:40 pm -
2 stops49h 00m
Deal found 9/28![Multiple Airlines logo]()
$445
This Kiwi.com deal was found by Cheapflights users on 9/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/106:20 am -
Nonstop3h 14m
Thu 11/122:51 pm -
1 stop27h 49m
Deal found 9/28![Frontier logo]()
$455
This Kiwi.com deal was found by Cheapflights users on 9/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/114:18 pm -
2 stops29h 29m
Thu 11/192:51 pm -
1 stop27h 49m
Deal found 9/29![Multiple Airlines logo]()
$444
This Cheapflightsfares deal was found by Cheapflights users on 9/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/176:20 am -
Nonstop3h 14m
Fri 11/2011:44 am -
1 stop6h 56m
Deal found 9/29![Frontier logo]()
$417
This Justfly.com deal was found by Cheapflights users on 9/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/269:09 am -
1 stop25h 07m
Thu 12/311:28 am -
1 stop24h 49m
Deal found 9/28![Frontier logo]()
$456
This Kiwi.com deal was found by Cheapflights users on 9/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/296:00 am -
Nonstop3h 14m
Thu 12/1011:28 am -
1 stop24h 49m
Deal found 9/29![Frontier logo]()
$434
This Kiwi.com deal was found by Cheapflights users on 9/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/306:00 am -
Nonstop3h 14m
Thu 12/1011:28 am -
1 stop24h 49m
Deal found 9/29![Frontier logo]()
$435
One-way flights from St. Louis to CancúnSearch for one-way flight options from St. Louis to Cancún. Find affordable one-way fares based on user searches. Data last updated October 1, 2026.
Search for one-way flight options from St. Louis to Cancún. Find affordable one-way fares based on user searches. Data last updated October 1, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/96:44 pm -
3 stops22h 23m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/27![Multiple Airlines logo]()
$168
This Kiwi.com deal was found by Cheapflights users on 9/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/212:02 pm -
3 stops29h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/30![Multiple Airlines logo]()
$185
This Kiwi.com deal was found by Cheapflights users on 9/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/306:44 pm -
3 stops47h 23m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/28![Multiple Airlines logo]()
$189
This Kiwi.com deal was found by Cheapflights users on 9/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/266:35 pm -
3 stops23h 39m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/27![Multiple Airlines logo]()
$196
This Super.com deal was found by Cheapflights users on 9/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/296:00 am -
Nonstop3h 14m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/30![Frontier logo]()
$211
This Kiwi.com deal was found by Cheapflights users on 9/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/96:44 pm -
2 stops39h 24m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/27![Frontier logo]()
$221
This Kiwi.com deal was found by Cheapflights users on 9/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/266:35 pm -
2 stops39h 33m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/29![Frontier logo]()
$222
Find flight deals from St. Louis to Cancún
Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Cancún (CUN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated October 1, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $417 (Cheapflightsfares) |
One-way from | $168 (Kiwi.com) |
Popular in | September |
Cheapest in | December |
Average price | $543 |
Good round-trip deal | $543 or less |
Good one-way deal | $288 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from St. Louis to Cancún that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated October 1, 2026.
Use the filters below to find and compare flights from St. Louis to Cancún that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
St. LouisCancún
STL Lambert-St Louis - CUN Cancun
STLCUN
Lambert-St Louis
Tue 10/27
6:00 am-7:55 pm
1 stop13h 55m
Cancun
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$253
St. LouisCancún
STL Lambert-St Louis - CUN Cancun
STLCUN
Lambert-St Louis
Sun 10/25
6:15 am-2:24 pm
1 stop8h 09m
Cancun
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$253
St. LouisCancún
STL Lambert-St Louis - CUN Cancun
STLCUN
Lambert-St Louis
Wed 11/4
8:00 am-4:55 pm
1 stop7h 55m
Cancun
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$253
St. LouisCancún
STL Lambert-St Louis - CUN Cancun
STLCUN
Lambert-St Louis
Sat 11/28
7:18 pm-11:07 am
1 stop14h 49m
Cancun
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$253
St. LouisCancún
STL Lambert-St Louis - CUN Cancun
STLCUN
Lambert-St Louis
Tue 10/27
5:00 am-2:24 pm
2 stops9h 24m
Cancun
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$253
Quickest round-trip
St. LouisCancún
STL Lambert-St Louis - CUN Cancun
STLCUN
Lambert-St Louis
Mon 11/2
2:25 pm-8:55 pm
1 stop5h 30m
Cancun
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$264
St. LouisCancún
STL Lambert-St Louis - CUN Cancun
STLCUN
Lambert-St Louis
Sun 3/28
6:15 am-7:19 pm
1 stop13h 04m
Cancun
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$270
St. LouisCancún
STL Lambert-St Louis - CUN Cancun
STLCUN
Lambert-St Louis
Sun 11/8
7:00 am-8:55 pm
1 stop12h 55m
Cancun
Tue 11/17
6:49 am-11:56 pm
2 stops18h 07m
$506
St. LouisCancún
STL Lambert-St Louis - CUN Cancun
STLCUN
Lambert-St Louis
Sun 11/8
7:00 am-8:40 pm
2 stops12h 40m
Cancun
Thu 11/19
12:13 pm-9:42 pm
1 stop10h 29m
$506
St. LouisCancún
STL Lambert-St Louis - CUN Cancun
STLCUN
Lambert-St Louis
Mon 12/7
7:03 am-9:08 pm
1 stop13h 05m
Cancun
Fri 12/11
11:21 am-12:05 am
2 stops13h 44m
$524
Showing 1-10 of 19 resultsSorted by cheapest first
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 October.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy- | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on St. Louis-Cancún flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Cancún flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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.
STL-CUN
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
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 40 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, December is the cheapest month in which you can book a flight from St. Louis to Cancún (average of $393). Flying from St. Louis to Cancún in September is currently the most expensive (average of $717). 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?
Find hourly flight availability from St. Louis to Cancún. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 1, 2026.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from St. Louis to Cancún as you normally would.
The best insider tips for St. Louis to Cancún flights
AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your St. Louis to Cancún trip
Our travel experts
Reviews of airlines servicing Cancún
Get insights into the airlines that provide service to Cancún. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Cancún. Reviews last updated October 1, 2026.
Get a feel of what it's like to fly with Southwest,United Airlines, andAmerican 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.
Overall
8.0
Comfort
8.0
Food
7.0
Crew
8.6
Entertainment
7.5
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentEdward,Sep 2026
MCO - BWI
Overall
8.0
Comfort
8.0
Food
7.0
Crew
8.6
Entertainment
7.5
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentEdward,Sep 2026
MCO - BWI
Overall
8.0
Comfort
8.0
Food
7.0
Crew
8.6
Entertainment
7.5
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentEdward,Sep 2026
MCO - BWI
Overall
8.0
Comfort
8.0
Food
7.0
Crew
8.6
Entertainment
7.5
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentEdward,Sep 2026
MCO - BWI
Overall
8.0
Comfort
8.0
Food
7.0
Crew
8.6
Entertainment
7.5
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentEdward,Sep 2026
MCO - BWI
Overall
8.0
Comfort
8.0
Food
7.0
Crew
8.6
Entertainment
7.5
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentEdward,Sep 2026
MCO - BWI
Related info for your journey
Find useful and relevant information for your journey from St. Louis to Cancún. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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St. Louis and Cancún flights
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Top 9 airlines flying from St. Louis to Cancún
Discover the top 9 airlines that operate flights from St. Louis to Cancún. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated October 1, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$187 | Average$380 | FlexibilityNo cancel fee | On-time79% | |
| Cheapest$196 | Average$456 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$199 | Average$416 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$220 | Average$461 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$259 | Average$526 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$404 | Average$545 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$405 | Average$578 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$424 | Average$655 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$458 | Average$656 | FlexibilityNo cancel fee | On-time63% |