$146+ Cheap flights from St. Louis (STL) to Cancún (CUN)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/1. Fares are subject to change and may not be available on all flights or dates of travel.
STL — CUN
Aug 31 — Sep 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 September or December, booked 27 days in advance, depart on a Wednesday or Monday and return on a Friday
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 August 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 August 1, 2026.
This deal was found by Cheapflights users on 7/30. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/46:10 am
STL
- CUN
Nonstop3h 09m
Frontier
Mon 11/91:35 pm
CUN
- STL
Nonstop3h 17m
Frontier
Deal found 7/30![Frontier logo]()
$376
This Kiwi.com deal was found by Cheapflights users on 7/30. 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.
Sun 10/116:41 pm
STL
- CUN
2 stops39h 22m
Multiple Airlines
Sun 10/183:41 pm
CUN
- STL
1 stop17h 59m
Multiple Airlines
Deal found 7/30![Multiple Airlines logo]()
$418
This Trip.com deal was found by Cheapflights users on 7/29. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/248:55 am
STL
- CUN
1 stop24h 55m
Air Canada
Wed 9/301:30 pm
CUN
- STL
1 stop29h 11m
Air Canada
Deal found 7/29![Air Canada logo]()
$427
This Trip.com deal was found by Cheapflights users on 7/31. 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.
Sun 9/207:00 am
STL
- CUN
1 stop12h 50m
Aeromexico
Wed 9/302:00 pm
CUN
- STL
1 stop9h 42m
Aeromexico
Deal found 7/31![Aeromexico logo]()
$431
This Southwest deal was found by Cheapflights users on 7/30. 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.
Mon 8/246:05 am
STL
- CUN
1 stop5h 55m
Southwest
Thu 8/271:10 pm
CUN
- STL
Nonstop3h 05m
Southwest
Deal found 7/30![Southwest logo]()
$439
This Kiwi.com deal was found by Cheapflights users on 7/31. 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 10/2810:35 am
STL
- CUN
1 stop26h 39m
Multiple Airlines
Sun 11/13:24 pm
CUN
- STL
1 stop19h 16m
Multiple Airlines
Deal found 7/31![Multiple Airlines logo]()
$441
This FlightHub deal was found by Cheapflights users on 7/29. 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.
Wed 10/1410:35 am
STL
- CUN
1 stop27h 56m
Frontier
Mon 10/193:41 pm
CUN
- STL
1 stop17h 59m
Frontier
Deal found 7/29![Frontier logo]()
$448
This Southwest deal was found by Cheapflights users on 7/29. 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.
Wed 8/266:30 am
STL
- CUN
1 stop5h 40m
Southwest
Thu 8/271:10 pm
CUN
- STL
Nonstop3h 05m
Southwest
Deal found 7/29![Southwest logo]()
$449
This Orbitz deal was found by Cheapflights users on 7/29. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/1412:10 pm
STL
- CUN
1 stop24h 00m
Air Canada
Mon 9/219:05 pm
CUN
- STL
1 stop16h 55m
Air Canada
Deal found 7/29![Air Canada logo]()
$450
This Orbitz deal was found by Cheapflights users on 7/28. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/232:29 pm
STL
- CUN
1 stop22h 08m
Multiple Airlines
Mon 9/289:05 pm
CUN
- STL
1 stop16h 55m
Multiple Airlines
Deal found 7/28![Multiple Airlines logo]()
$451
This Delta deal was found by Cheapflights users on 7/29. 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.
Tue 8/256:00 am
STL
- CUN
2 stops12h 44m
Delta
Tue 9/112:35 pm
CUN
- STL
2 stops10h 46m
Delta
Deal found 7/29![Delta logo]()
$453
This Air Canada deal was found by Cheapflights users on 7/29. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/68:55 am
STL
- CUN
1 stop11h 15m
Air Canada
Fri 9/119:05 pm
CUN
- STL
1 stop16h 55m
Air Canada
Deal found 7/29![Air Canada logo]()
$454
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 August 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 August 1, 2026.
This Delta deal was found by Cheapflights users on 7/31. 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 1/207:20 am
STL
- CUN
2 stops11h 40m
Delta
Wed 1/2711:18 am
CUN
- STL
2 stops13h 21m
Delta
Deal found 7/31![Delta logo]()
$485
This Southwest deal was found by Cheapflights users on 7/29. 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 1/18:30 am
STL
- CUN
1 stop6h 00m
Southwest
Thu 1/73:35 pm
CUN
- STL
Nonstop3h 15m
Southwest
Deal found 7/29![Southwest logo]()
$589
This Delta deal was found by Cheapflights users on 8/1. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/276:15 am
STL
- CUN
2 stops12h 34m
Delta
Mon 10/512:40 pm
CUN
- STL
2 stops11h 02m
Delta
Deal found 8/1![Delta logo]()
$529
This Delta deal was found by Cheapflights users on 7/28. 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.
Mon 12/76:00 am
STL
- CUN
1 stop8h 30m
Delta
Fri 12/1111:20 am
CUN
- STL
2 stops13h 03m
Delta
Deal found 7/28![Delta logo]()
$537
This Southwest deal was found by Cheapflights users on 7/31. 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 8/215:15 am
STL
- CUN
1 stop5h 20m
Southwest
Thu 8/271:10 pm
CUN
- STL
Nonstop3h 05m
Southwest
Deal found 7/31![Southwest logo]()
$599
This Delta deal was found by Cheapflights users on 7/29. 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 10/186:00 am
STL
- CUN
1 stop8h 25m
Delta
Sun 10/2512:09 pm
CUN
- STL
2 stops11h 45m
Delta
Deal found 7/29![Delta logo]()
$565
This Southwest deal was found by Cheapflights users on 7/27. 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.
Sat 9/267:00 am
STL
- CUN
1 stop7h 40m
Southwest
Sat 10/312:45 pm
CUN
- STL
Nonstop3h 10m
Southwest
Deal found 7/27![Southwest logo]()
$659
This Delta deal was found by Cheapflights users on 7/31. 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 9/266:15 am
STL
- CUN
2 stops12h 34m
Delta
Sat 10/36:04 am
CUN
- STL
2 stops10h 28m
Delta
Deal found 7/31![Delta logo]()
$575
This Southwest deal was found by Cheapflights users on 7/30. 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.
Sat 11/2112:00 pm
STL
- CUN
Nonstop3h 05m
Southwest
Wed 11/2511:20 am
CUN
- STL
Nonstop3h 05m
Southwest
Deal found 7/30![Southwest logo]()
$661
This Delta deal was found by Cheapflights users on 7/28. 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 1/237:20 am
STL
- CUN
2 stops11h 40m
Delta
Sat 2/133:10 pm
CUN
- STL
1 stop6h 39m
Delta
Deal found 7/28![Delta logo]()
$575
This Delta deal was found by Cheapflights users on 7/29. 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.
Sat 10/177:00 am
STL
- CUN
2 stops13h 28m
Delta
Sat 10/246:04 am
CUN
- STL
2 stops10h 24m
Delta
Deal found 7/29![Delta logo]()
$610
Last-minute flights from St. Louis to CancúnDiscover last-minute flight deals from St. Louis to Cancún. Data last updated August 1, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Cancún. Data last updated August 1, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 7/27. 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 8/154:57 pm
STL
- CUN
1 stop20h 56m
Frontier
Sat 8/2910:23 am
CUN
- STL
2 stops30h 59m
Frontier
Deal found 7/27![Frontier logo]()
$472
This American Airlines deal was found by Cheapflights users on 7/28. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/188:36 am
STL
- CUN
1 stop11h 27m
American Airlines
Tue 8/252:07 pm
CUN
- STL
1 stop8h 33m
American Airlines
Deal found 7/28![American Airlines logo]()
$480
This Kiwi.com deal was found by Cheapflights users on 7/31. 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 8/216:17 pm
STL
- CUN
1 stop19h 37m
Multiple Airlines
Thu 8/275:25 am
CUN
- STL
2 stops13h 48m
Multiple Airlines
Deal found 7/31![Multiple Airlines logo]()
$489
This Aeromexico deal was found by Cheapflights users on 7/29. 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 Aeromexico is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/227:00 am
STL
- CUN
2 stops18h 30m
Aeromexico
Wed 8/2612:30 pm
CUN
- STL
1 stop10h 51m
Aeromexico
Deal found 7/29![Aeromexico logo]()
$494
This Southwest deal was found by Cheapflights users on 7/30. 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.
Mon 8/246:05 am
STL
- CUN
1 stop5h 55m
Southwest
Thu 8/271:10 pm
CUN
- STL
Nonstop3h 05m
Southwest
Deal found 7/30![Southwest logo]()
$439
This Southwest deal was found by Cheapflights users on 7/30. 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.
Mon 8/245:45 am
STL
- CUN
2 stops9h 15m
Southwest
Fri 8/2812:50 pm
CUN
- STL
1 stop8h 50m
Southwest
Deal found 7/30![Southwest logo]()
$463
This Delta deal was found by Cheapflights users on 7/29. 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.
Tue 8/256:00 am
STL
- CUN
2 stops12h 44m
Delta
Tue 9/112:35 pm
CUN
- STL
2 stops10h 46m
Delta
Deal found 7/29![Delta logo]()
$453
This Delta deal was found by Cheapflights users on 7/29. 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 8/266:20 am
STL
- CUN
1 stop6h 36m
Delta
Wed 9/212:30 pm
CUN
- STL
1 stop10h 51m
Delta
Deal found 7/29![Delta logo]()
$449
This Southwest deal was found by Cheapflights users on 7/29. 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.
Wed 8/266:30 am
STL
- CUN
1 stop5h 40m
Southwest
Thu 8/271:40 pm
CUN
- STL
1 stop8h 10m
Southwest
Deal found 7/29![Southwest logo]()
$459
This FlightHub deal was found by Cheapflights users on 7/29. 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.
Wed 8/268:55 am
STL
- CUN
1 stop11h 15m
Multiple Airlines
Sun 8/303:06 pm
CUN
- STL
1 stop26h 16m
Multiple Airlines
Deal found 7/29![Multiple Airlines logo]()
$498
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 August 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 August 1, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/30. 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.
Tue 9/15:27 pm
STL
- CUN
2 stops24h 03m
Multiple Airlines
Deal found 7/30![Multiple Airlines logo]()
$146
This Kiwi.com deal was found by Cheapflights users on 8/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/282:29 pm
STL
- CUN
3 stops44h 50m
Multiple Airlines
Deal found 8/1![Multiple Airlines logo]()
$169
This Kiwi.com deal was found by Cheapflights users on 7/27. 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 8/246:17 pm
STL
- CUN
3 stops41h 02m
Multiple Airlines
Deal found 7/27![Multiple Airlines logo]()
$173
This Kiwi.com deal was found by Cheapflights users on 7/29. 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 8/316:17 pm
STL
- CUN
3 stops39h 46m
Multiple Airlines
Deal found 7/29![Multiple Airlines logo]()
$179
This Kiwi.com deal was found by Cheapflights users on 7/28. 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 9/252:29 pm
STL
- CUN
3 stops43h 34m
Multiple Airlines
Deal found 7/28![Multiple Airlines logo]()
$181
This Kiwi.com deal was found by Cheapflights users on 7/30. 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 9/308:10 pm
STL
- CUN
2 stops27h 48m
Multiple Airlines
Deal found 7/30![Multiple Airlines logo]()
$183
This Kiwi.com deal was found by Cheapflights users on 7/28. 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.
Thu 9/2410:20 am
STL
- CUN
2 stops23h 43m
Multiple Airlines
Deal found 7/28![Multiple Airlines logo]()
$184
This Kiwi.com deal was found by Cheapflights users on 7/31. 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.
Thu 10/110:20 am
STL
- CUN
2 stops31h 10m
Multiple Airlines
Deal found 7/31![Multiple Airlines logo]()
$188
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 August 1, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $376 |
One-way from | $146 (Kiwi.com) |
Popular in | June |
Cheapest in | September |
Average price | $494 |
Good round-trip deal | $542 or less |
Good one-way deal | $270 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 2,558,603 searches. Data last updated August 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 - CUN
STLCUN
Lambert-St Louis
Wed 1/20
7:20 am-8:00 pm
2 stops11h 40m
Cancun
Wed 1/27
11:18 am-11:39 pm
2 stops13h 21m
$485
St. LouisCancún
STL - CUN
STLCUN
Lambert-St Louis
Sun 9/27
6:15 am-6:49 pm
2 stops12h 34m
Cancun
Mon 10/5
12:40 pm-11:42 pm
2 stops11h 02m
$529
St. LouisCancún
STL - CUN
STLCUN
Lambert-St Louis
Mon 12/7
6:00 am-3:30 pm
1 stop8h 30m
Cancun
Fri 12/11
11:20 am-11:23 pm
2 stops13h 03m
$537
St. LouisCancún
STL - CUN
STLCUN
Lambert-St Louis
Sun 10/18
6:00 am-2:25 pm
1 stop8h 25m
Cancun
Sun 10/25
12:09 pm-11:54 pm
2 stops11h 45m
$565
St. LouisCancún
STL - CUN
STLCUN
Lambert-St Louis
Sat 9/26
6:15 am-6:49 pm
2 stops12h 34m
Cancun
Sat 10/3
6:04 am-4:32 pm
2 stops10h 28m
$575
St. LouisCancún
STL - CUN
STLCUN
Lambert-St Louis
Sat 1/23
7:20 am-8:00 pm
2 stops11h 40m
Cancun
Sat 2/13
3:10 pm-8:49 pm
1 stop6h 39m
$575
St. LouisCancún
STL - CUN
STLCUN
Lambert-St Louis
Fri 1/1
8:30 am-3:30 pm
1 stop6h 00m
Cancun
Thu 1/7
3:35 pm-5:50 pm
Nonstop3h 15m
$589
St. LouisCancún
STL - CUN
STLCUN
Lambert-St Louis
Fri 8/21
5:15 am-10:35 am
1 stop5h 20m
Cancun
Thu 8/27
1:10 pm-4:15 pm
Nonstop3h 05m
$599
St. LouisCancún
STL - CUN
STLCUN
Lambert-St Louis
Sat 10/17
7:00 am-8:28 pm
2 stops13h 28m
Cancun
Sat 10/24
6:04 am-4:28 pm
2 stops10h 24m
$610
St. LouisCancún
STL - CUN
STLCUN
Lambert-St Louis
Sat 9/26
7:00 am-2:40 pm
1 stop7h 40m
Cancun
Sat 10/3
12:45 pm-3:55 pm
Nonstop3h 10m
$659
Showing 1-10 of 22 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 August.
| 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 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
Prices
Airlines
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 26 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, September is the cheapest month in which you can book a flight from St. Louis to Cancún (average of $326). Flying from St. Louis to Cancún in June is currently the most expensive (average of $590). 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 August 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 August 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
Crew
8.6
Entertainment
7.5
Food
7.0
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Overall
8.0
Comfort
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Overall
8.0
Comfort
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Overall
8.0
Comfort
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Overall
8.0
Comfort
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Overall
8.0
Comfort
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
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
Holbox
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Other flights to Cancún
Explore flights to Cancún departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on August 1, 2026.
Complete your trip
Complete your trip to Cancún by adding a car rental and/or hotel reservation to your travel itinerary.
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St. Louis and Cancún flights
Browse other St. Louis and Cancún flight options. Last updated on August 1, 2026.
Other flights from St. Louis
Browse through other flights departing from St. Louis. Flights are based on user searches made on Cheapflights and were last updated on August 1, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
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 2,558,603 searches. Data last updated August 1, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$168 | Average$462 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$187 | Average$380 | FlexibilityNo cancel fee | On-time79% | |
| Cheapest$195 | Average$550 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$225 | Average$429 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$236 | Average$469 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$330 | Average$563 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$404 | Average$545 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$416 | Average$641 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$455 | Average$643 | FlexibilityNo cancel fee | On-time63% |