$197+ 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 11/25. Fares are subject to change and may not be available on all flights or dates of travel.
STL — CUN
Nov 29 — Dec 61
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 January or December, booked 67 days in advance, depart on a Tuesday or Wednesday and return on a Tuesday
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 30, 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 30, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 10/27. 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 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 12/112:15 pm -
Nonstop3h 25m
Deal found 10/27![Frontier logo]()
$433
This FlightHub deal was found by Cheapflights users on 10/25. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/296:00 am -
Nonstop3h 14m
Thu 12/311:26 am -
1 stop24h 51m
Deal found 10/25![Frontier logo]()
$450
This Kiwi.com deal was found by Cheapflights users on 10/28. 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 11/176:20 am -
Nonstop3h 14m
Wed 11/2511:44 am -
1 stop6h 56m
Deal found 10/28![Frontier logo]()
$452
This FlightHub deal was found by Cheapflights users on 10/25. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/1112:02 pm -
1 stop20h 53m
Wed 12/162:15 pm -
Nonstop3h 25m
Deal found 10/25![Frontier logo]()
$464
This Justfly.com deal was found by Cheapflights users on 10/25. 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.
Wed 12/912:02 pm -
1 stop21h 16m
Sun 12/1311:28 am -
1 stop24h 49m
Deal found 10/25![Frontier logo]()
$467
This FlightHub deal was found by Cheapflights users on 10/28. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/136:34 pm -
1 stop18h 07m
Wed 11/2511:44 am -
1 stop6h 56m
Deal found 10/28![Frontier logo]()
$468
This Travelocity deal was found by Cheapflights users on 10/27. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/264:05 pm -
1 stop27h 25m
Thu 12/32:08 pm -
Nonstop3h 20m
Deal found 10/27![Multiple Airlines logo]()
$469
This FlightHub deal was found by Cheapflights users on 10/28. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/1112:02 pm -
1 stop20h 53m
Sun 12/204:28 pm -
1 stop19h 25m
Deal found 10/28![Frontier logo]()
$470
This Trip.com deal was found by Cheapflights users on 10/27. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/24:05 pm -
1 stop27h 25m
Mon 12/79:30 pm -
1 stop18h 56m
Deal found 10/27![Air Canada logo]()
$472
This CheapOair deal was found by Cheapflights users on 10/27. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/76:00 am -
Nonstop3h 28m
Fri 12/118:00 am -
1 stop8h 26m
Deal found 10/27![Multiple Airlines logo]()
$473
This CheapOair deal was found by Cheapflights users on 10/28. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/76:00 am -
Nonstop3h 28m
Tue 12/159:30 pm -
1 stop18h 56m
Deal found 10/28![Multiple Airlines logo]()
$474
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 30, 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 30, 2026.
This Delta deal was found by Cheapflights users on 10/26. 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.
Wed 4/146:00 am -
2 stops10h 31m
Wed 4/2110:01 am -
1 stop13h 38m
Deal found 10/26![Delta logo]()
$540
This Southwest deal was found by Cheapflights users on 10/29. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/185:15 am -
1 stop7h 40m
Fri 2/264:20 pm -
Nonstop3h 15m
Deal found 10/29![Southwest logo]()
$615
This Delta deal was found by Cheapflights users on 10/29. 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.
Wed 1/277:07 am -
1 stop7h 10m
Thu 1/284:30 pm -
1 stop6h 15m
Deal found 10/29![Delta logo]()
$540
This Delta deal was found by Cheapflights users on 10/28. 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.
Wed 3/246:30 am -
2 stops11h 08m
Tue 3/309:14 am -
2 stops11h 35m
Deal found 10/28![Delta logo]()
$546
This Southwest deal was found by Cheapflights users on 10/29. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/198:25 am -
2 stops8h 00m
Fri 2/2610:55 am -
2 stops9h 15m
Deal found 10/29![Southwest logo]()
$630
This Southwest deal was found by Cheapflights users on 10/25. 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.
Sun 1/107:50 am -
2 stops10h 55m
Sun 1/179:40 am -
2 stops7h 55m
Deal found 10/25![Southwest logo]()
$630
This Delta deal was found by Cheapflights users on 10/25. 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.
Thu 4/86:30 am -
2 stops12h 05m
Thu 4/1511:22 am -
2 stops12h 17m
Deal found 10/25![Delta logo]()
$588
This Delta deal was found by Cheapflights users on 10/26. 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 4/106:00 am -
2 stops12h 45m
Tue 4/138:08 am -
2 stops12h 41m
Deal found 10/26![Delta logo]()
$588
This Southwest deal was found by Cheapflights users on 10/26. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/207:25 am -
Nonstop3h 05m
Thu 12/248:20 am -
2 stops10h 05m
Deal found 10/26![Southwest logo]()
$650
This Delta deal was found by Cheapflights users on 10/28. 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 11/286:00 am -
1 stop6h 47m
Sat 12/511:26 am -
2 stops13h 39m
Deal found 10/28![Delta logo]()
$636
Last-minute flights from St. Louis to CancúnDiscover last-minute flight deals from St. Louis to Cancún. Data last updated October 30, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Cancún. Data last updated October 30, 2026 and is based on user searches.
This FlightHub deal was found by Cheapflights users on 10/28. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/136:34 pm -
1 stop18h 07m
Wed 11/2511:44 am -
1 stop6h 56m
Deal found 10/28![Frontier logo]()
$468
This Kiwi.com deal was found by Cheapflights users on 10/28. 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 11/176:20 am -
Nonstop3h 14m
Wed 11/2511:44 am -
1 stop6h 56m
Deal found 10/28![Frontier logo]()
$452
This deal was found by Cheapflights users on 10/28. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/206:00 am -
Nonstop3h 14m
Sat 11/282:05 pm -
Nonstop3h 20m
Deal found 10/28![Frontier logo]()
$488
This Justfly.com deal was found by Cheapflights users on 10/26. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/224:05 pm -
1 stop17h 35m
Wed 11/256:18 pm -
1 stop14h 36m
Deal found 10/26![Multiple Airlines logo]()
$483
This Mytrip deal was found by Cheapflights users on 10/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/236:35 pm -
1 stop14h 59m
Wed 12/28:00 am -
1 stop8h 26m
Deal found 10/28![Multiple Airlines logo]()
$474
This Travelocity deal was found by Cheapflights users on 10/27. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/264:05 pm -
1 stop27h 25m
Thu 12/32:08 pm -
Nonstop3h 20m
Deal found 10/27![Multiple Airlines logo]()
$469
This FlightHub deal was found by Cheapflights users on 10/29. 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 FlightHub 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 12/32:08 pm -
Nonstop3h 20m
Deal found 10/29![Frontier logo]()
$479
This Cheapflightsfares deal was found by Cheapflights users on 10/29. 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.
Sun 11/296:00 am -
Nonstop3h 14m
Thu 12/32:08 pm -
Nonstop3h 20m
Deal found 10/29![Frontier logo]()
$433
This Cheapflightsfares deal was found by Cheapflights users on 10/25. 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.
Sun 11/296:00 am -
Nonstop3h 14m
Sat 12/52:15 pm -
Nonstop3h 25m
Deal found 10/25![Frontier logo]()
$482
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 30, 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 30, 2026.
This FlightHub deal was found by Cheapflights users on 10/28. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/256:35 pm -
1 stop14h 59m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/28![Frontier logo]()
$197
This Kiwi.com deal was found by Cheapflights users on 10/27. 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.
Sat 11/213:04 pm -
2 stops43h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/27![Frontier logo]()
$198
This Kiwi.com deal was found by Cheapflights users on 10/25. 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 1/116:00 am -
Nonstop3h 28m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/25![Frontier logo]()
$201
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
Mon 11/236:35 pm -
1 stop14h 59m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/28![Frontier logo]()
$203
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
Mon 2/226:00 am -
Nonstop3h 28m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/28![Frontier logo]()
$208
This Cheapflightsfares deal was found by Cheapflights users on 10/28. 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 Cheapflightsfares 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 10/28![Frontier logo]()
$209
This Expedia deal was found by Cheapflights users on 10/29. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/166:00 am -
Nonstop3h 28m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/29![Frontier logo]()
$211
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
Wed 12/212:05 pm -
3 stops28h 04m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/28![Multiple Airlines logo]()
$217
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
Mon 2/227:02 pm -
2 stops27h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/28![Multiple Airlines logo]()
$222
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
Mon 12/286:21 pm -
1 stop14h 57m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/28![Frontier logo]()
$224
This Mytrip deal was found by Cheapflights users on 10/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/212:05 pm -
2 stops21h 59m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/28![Frontier logo]()
$226
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 30, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $424 (Kiwi.com) |
One-way from | $197 (FlightHub) |
Popular in | September |
Cheapest in | January |
Average price | $594 |
Good round-trip deal | $544 or less |
Good one-way deal | $210 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 30, 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
Sat 11/21
3:04 pm-11:04 am
2 stops43h 00m
Cancun
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$243
St. LouisCancún
STL Lambert-St Louis - CUN Cancun
STLCUN
Lambert-St Louis
Sun 12/13
8:35 am-7:45 pm
2 stops10h 10m
Cancun
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$261
St. LouisCancún
STL Lambert-St Louis - CUN Cancun
STLCUN
Lambert-St Louis
Mon 2/15
8:25 am-5:25 pm
2 stops8h 00m
Cancun
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$261
St. LouisCancún
STL Lambert-St Louis - CUN Cancun
STLCUN
Lambert-St Louis
Sun 2/14
8:35 am-7:45 pm
2 stops10h 10m
Cancun
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$283
St. LouisCancún
STL Lambert-St Louis - CUN Cancun
STLCUN
Lambert-St Louis
Tue 11/24
6:00 am-8:55 pm
1 stop13h 55m
Cancun
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$296
St. LouisCancún
STL Lambert-St Louis - CUN Cancun
STLCUN
Lambert-St Louis
Sat 1/23
8:19 pm-1:19 pm
1 stop16h 00m
Cancun
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$296
Quickest round-trip
St. LouisCancún
STL Lambert-St Louis - CUN Cancun
STLCUN
Lambert-St Louis
Sat 12/19
6:00 am-10:28 am
Nonstop3h 28m
Cancun
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$330
St. LouisCancún
STL Lambert-St Louis - CUN Cancun
STLCUN
Lambert-St Louis
Wed 12/30
10:45 am-1:34 pm
2 stops25h 49m
Cancun
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$331
St. LouisCancún
STL Lambert-St Louis - CUN Cancun
STLCUN
Lambert-St Louis
Sun 11/29
6:50 pm-1:34 pm
2 stops17h 44m
Cancun
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$331
St. LouisCancún
STL Lambert-St Louis - CUN Cancun
STLCUN
Lambert-St Louis
Thu 12/24
6:20 am-2:07 pm
1 stop6h 47m
Cancun
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$336
Showing 1-10 of 20 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 Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy- | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | 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 |
- 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 66 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, January is the cheapest month in which you can book a flight from St. Louis to Cancún (average of $447). Flying from St. Louis to Cancún in September is currently the most expensive (average of $721). 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 30, 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 30, 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.
Food
7.0
Boarding
8.1
Overall
7.9
Crew
8.6
Entertainment
7.4
Comfort
8.0
Reviews
1 / 20
8.0
ExcellentPatricia,Oct 2026
DAL - TPA
Food
7.0
Boarding
8.1
Overall
7.9
Crew
8.6
Entertainment
7.4
Comfort
8.0
Reviews
1 / 20
8.0
ExcellentPatricia,Oct 2026
DAL - TPA
Food
7.0
Boarding
8.1
Overall
7.9
Crew
8.6
Entertainment
7.4
Comfort
8.0
Reviews
1 / 20
8.0
ExcellentPatricia,Oct 2026
DAL - TPA
Food
7.0
Boarding
8.1
Overall
7.9
Crew
8.6
Entertainment
7.4
Comfort
8.0
Reviews
1 / 20
8.0
ExcellentPatricia,Oct 2026
DAL - TPA
Food
7.0
Boarding
8.1
Overall
7.9
Crew
8.6
Entertainment
7.4
Comfort
8.0
Reviews
1 / 20
8.0
ExcellentPatricia,Oct 2026
DAL - TPA
Food
7.0
Boarding
8.1
Overall
7.9
Crew
8.6
Entertainment
7.4
Comfort
8.0
Reviews
1 / 20
8.0
ExcellentPatricia,Oct 2026
DAL - TPA
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.
Traveling to a place near Cancún?
Book flights to Cancún if you plan to visit one of these locationsPuerto Aventuras
Punta Sam
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St. Louis and Cancún flights
Browse other St. Louis and Cancún flight options. Last updated on October 30, 2026.
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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 30, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$184 | Average$370 | FlexibilityNo cancel fee | On-time79% | |
| Cheapest$196 | Average$481 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$199 | Average$416 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$248 | Average$483 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$259 | Average$526 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$371 | Average$585 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$404 | Average$608 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$439 | Average$659 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$459 | Average$659 | FlexibilityNo cancel fee | On-time63% |