$141+ 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 7/27. Fares are subject to change and may not be available on all flights or dates of travel.
STL — CUN
Jul 4 — Jul 111
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 October, booked 42 days in advance, depart on a Monday or Wednesday 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 June 4, 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 June 4, 2026.
This Travelocity deal was found by Cheapflights users on 6/1. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/98:08 pm
STL
- CUN
1 stop16h 41m
Frontier
Wed 8/123:06 pm
CUN
- STL
1 stop26h 31m
Frontier
Deal found 6/1![Frontier logo]()
$377
This Kiwi.com deal was found by Cheapflights users on 6/1. 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.
Tue 6/308:08 pm
STL
- CUN
1 stop16h 40m
Multiple Airlines
Tue 7/75:25 am
CUN
- STL
2 stops13h 58m
Multiple Airlines
Deal found 6/1![Multiple Airlines logo]()
$382
This Southwest deal was found by Cheapflights users on 5/31. 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.
Tue 7/218:35 am
STL
- CUN
Nonstop3h 05m
Southwest
Tue 7/283:05 pm
CUN
- STL
Nonstop3h 05m
Southwest
Deal found 5/31![Southwest logo]()
$384
This Orbitz deal was found by Cheapflights users on 6/1. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/126:34 pm
STL
- CUN
1 stop19h 12m
Frontier
Wed 7/153:31 pm
CUN
- STL
1 stop27h 52m
Frontier
Deal found 6/1![Frontier logo]()
$385
This FlightHub deal was found by Cheapflights users on 6/1. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/176:34 am
STL
- CUN
Nonstop3h 16m
Frontier
Mon 7/2011:04 am
CUN
- STL
Nonstop3h 19m
Frontier
Deal found 6/1![Frontier logo]()
$387
This Southwest deal was found by Cheapflights users on 6/1. 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.
Mon 7/138:10 am
STL
- CUN
2 stops8h 00m
Southwest
Wed 7/2212:40 pm
CUN
- STL
Nonstop3h 10m
Southwest
Deal found 6/1![Southwest logo]()
$389
This Travelocity deal was found by Cheapflights users on 6/1. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/86:34 am
STL
- CUN
Nonstop3h 16m
Frontier
Sat 7/113:06 pm
CUN
- STL
1 stop26h 31m
Frontier
Deal found 6/1![Frontier logo]()
$390
This Orbitz deal was found by Cheapflights users on 6/1. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/98:08 pm
STL
- CUN
1 stop16h 41m
Frontier
Mon 7/133:31 pm
CUN
- STL
1 stop27h 52m
Frontier
Deal found 6/1![Frontier logo]()
$392
This Travelocity deal was found by Cheapflights users on 6/1. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/256:10 am
STL
- CUN
Nonstop3h 09m
Frontier
Thu 10/2912:35 pm
CUN
- STL
Nonstop3h 17m
Frontier
Deal found 6/1![Frontier logo]()
$396
This American Airlines deal was found by Cheapflights users on 5/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/75:10 am
STL
- CUN
1 stop8h 25m
American Airlines
Tue 7/148:00 am
CUN
- STL
1 stop15h 58m
American Airlines
Deal found 5/30![American Airlines logo]()
$398
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 June 4, 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 June 4, 2026.
This Southwest deal was found by Cheapflights users on 5/31. 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.
Tue 7/216:00 am
STL
- CUN
1 stop9h 25m
Southwest
Tue 7/283:05 pm
CUN
- STL
Nonstop3h 05m
Southwest
Deal found 5/31![Southwest logo]()
$388
This Delta deal was found by Cheapflights users on 6/2. 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 7/226:21 am
STL
- CUN
1 stop6h 39m
Delta
Fri 7/3112:35 pm
CUN
- STL
2 stops11h 18m
Delta
Deal found 6/2![Delta logo]()
$509
This United Airlines deal was found by Cheapflights users on 5/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/88:00 am
STL
- CUN
1 stop6h 26m
United Airlines
Sat 7/117:51 am
CUN
- STL
2 stops13h 35m
United Airlines
Deal found 5/30![United Airlines logo]()
$568
This Southwest deal was found by Cheapflights users on 5/30. 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.
Thu 7/98:10 am
STL
- CUN
2 stops8h 00m
Southwest
Sun 7/124:50 pm
CUN
- STL
1 stop7h 05m
Southwest
Deal found 5/30![Southwest logo]()
$518
This Delta deal was found by Cheapflights users on 5/30. 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.
Fri 7/106:21 am
STL
- CUN
1 stop6h 39m
Delta
Sat 7/112:10 pm
CUN
- STL
1 stop7h 53m
Delta
Deal found 5/30![Delta logo]()
$518
This United Airlines deal was found by Cheapflights users on 6/1. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/166:01 am
STL
- CUN
1 stop7h 38m
United Airlines
Thu 7/233:24 pm
CUN
- STL
2 stops17h 15m
United Airlines
Deal found 6/1![United Airlines logo]()
$569
This Delta deal was found by Cheapflights users on 5/31. 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.
Fri 7/1010:51 am
STL
- CUN
1 stop9h 32m
Delta
Tue 7/1412:35 pm
CUN
- STL
2 stops11h 18m
Delta
Deal found 5/31![Delta logo]()
$523
This Delta deal was found by Cheapflights users on 5/31. 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.
Tue 8/117:00 am
STL
- CUN
2 stops12h 30m
Delta
Tue 8/1811:16 am
CUN
- STL
2 stops12h 05m
Delta
Deal found 5/31![Delta logo]()
$528
This Southwest deal was found by Cheapflights users on 5/30. 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.
Thu 7/25:05 am
STL
- CUN
2 stops8h 35m
Southwest
Mon 7/611:45 am
CUN
- STL
1 stop9h 15m
Southwest
Deal found 5/30![Southwest logo]()
$598
This Delta deal was found by Cheapflights users on 6/2. 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 8/186:00 am
STL
- CUN
2 stops12h 39m
Delta
Tue 8/258:05 am
CUN
- STL
1 stop6h 28m
Delta
Deal found 6/2![Delta logo]()
$529
Last-minute flights from St. Louis to CancúnDiscover last-minute flight deals from St. Louis to Cancún. Data last updated June 4, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Cancún. Data last updated June 4, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 6/1. 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.
Tue 6/308:08 pm
STL
- CUN
1 stop16h 40m
Multiple Airlines
Tue 7/75:25 am
CUN
- STL
2 stops13h 58m
Multiple Airlines
Deal found 6/1![Multiple Airlines logo]()
$382
This Super.com deal was found by Cheapflights users on 6/3. 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.
Wed 7/16:30 am
STL
- CUN
Nonstop3h 19m
Frontier
Wed 7/811:04 am
CUN
- STL
Nonstop3h 19m
Frontier
Deal found 6/3![Frontier logo]()
$401
This American Airlines deal was found by Cheapflights users on 5/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/75:10 am
STL
- CUN
1 stop8h 25m
American Airlines
Tue 7/148:00 am
CUN
- STL
1 stop15h 58m
American Airlines
Deal found 5/30![American Airlines logo]()
$398
This deal was found by Cheapflights users on 6/1. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/77:08 am
STL
- CUN
1 stop7h 28m
Delta
Wed 7/158:00 am
CUN
- STL
1 stop6h 48m
Delta
Deal found 6/1![Delta logo]()
$399
This Travelocity deal was found by Cheapflights users on 6/1. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/86:34 am
STL
- CUN
Nonstop3h 16m
Frontier
Sat 7/113:06 pm
CUN
- STL
1 stop26h 31m
Frontier
Deal found 6/1![Frontier logo]()
$390
This Orbitz deal was found by Cheapflights users on 6/1. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/98:08 pm
STL
- CUN
1 stop16h 41m
Frontier
Mon 7/133:31 pm
CUN
- STL
1 stop27h 52m
Frontier
Deal found 6/1![Frontier logo]()
$392
This Orbitz deal was found by Cheapflights users on 6/1. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/126:34 pm
STL
- CUN
1 stop19h 12m
Frontier
Wed 7/153:31 pm
CUN
- STL
1 stop27h 52m
Frontier
Deal found 6/1![Frontier logo]()
$385
This Southwest deal was found by Cheapflights users on 6/1. 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.
Mon 7/138:10 am
STL
- CUN
2 stops8h 00m
Southwest
Wed 7/2212:40 pm
CUN
- STL
Nonstop3h 10m
Southwest
Deal found 6/1![Southwest logo]()
$389
This FlightHub deal was found by Cheapflights users on 6/1. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/176:34 am
STL
- CUN
Nonstop3h 16m
Frontier
Mon 7/2011:04 am
CUN
- STL
Nonstop3h 19m
Frontier
Deal found 6/1![Frontier logo]()
$387
This Southwest deal was found by Cheapflights users on 5/31. 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.
Tue 7/218:35 am
STL
- CUN
Nonstop3h 05m
Southwest
Tue 7/283:05 pm
CUN
- STL
Nonstop3h 05m
Southwest
Deal found 5/31![Southwest logo]()
$384
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 June 4, 2026.
Search for one-way flight options from St. Louis to Cancún. Find affordable one-way fares based on user searches. Data last updated June 4, 2026.
This Frontier deal was found by Cheapflights users on 6/2. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/276:34 am
STL
- CUN
Nonstop3h 16m
Frontier
Deal found 6/2![Frontier logo]()
$141
This Kiwi.com deal was found by Cheapflights users on 6/4. 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 9/18:08 pm
STL
- CUN
2 stops27h 50m
Multiple Airlines
Deal found 6/4![Multiple Airlines logo]()
$143
This Kiwi.com deal was found by Cheapflights users on 6/1. 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.
Tue 6/308:08 pm
STL
- CUN
1 stop16h 40m
Frontier
Deal found 6/1![Frontier logo]()
$150
This Kiwi.com deal was found by Cheapflights users on 6/3. 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 7/76:34 am
STL
- CUN
Nonstop3h 16m
Frontier
Deal found 6/3![Frontier logo]()
$152
This Kiwi.com deal was found by Cheapflights users on 6/2. 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 7/266:34 am
STL
- CUN
Nonstop3h 16m
Frontier
Deal found 6/2![Frontier logo]()
$163
This Kiwi.com deal was found by Cheapflights users on 6/2. 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 8/268:08 pm
STL
- CUN
2 stops27h 50m
Multiple Airlines
Deal found 6/2![Multiple Airlines logo]()
$165
This Kiwi.com deal was found by Cheapflights users on 6/2. 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 9/28:08 pm
STL
- CUN
2 stops27h 50m
Multiple Airlines
Deal found 6/2![Multiple Airlines logo]()
$166
This Kiwi.com deal was found by Cheapflights users on 6/3. 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 8/318:08 pm
STL
- CUN
2 stops27h 50m
Multiple Airlines
Deal found 6/3![Multiple Airlines logo]()
$167
This Kiwi.com deal was found by Cheapflights users on 6/2. 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 8/298:08 pm
STL
- CUN
2 stops27h 50m
Multiple Airlines
Deal found 6/2![Multiple Airlines logo]()
$169
This Kiwi.com deal was found by Cheapflights users on 6/1. 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.
Fri 6/267:38 pm
STL
- CUN
1 stop17h 10m
Frontier
Deal found 6/1![Frontier logo]()
$170
This Kiwi.com deal was found by Cheapflights users on 5/31. 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.
Tue 8/258:08 pm
STL
- CUN
2 stops27h 50m
Multiple Airlines
Deal found 5/31![Multiple Airlines logo]()
$176
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 June 4, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $377 (Travelocity) |
One-way from | $141 (Frontier) |
Popular in | May |
Cheapest in | September |
Average price | $537 |
Good round-trip deal | $473 or less |
Good one-way deal | $215 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 June 4, 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
Quickest round-trip
St. LouisCancún
STL - CUN
STLCUN
Lambert-St Louis
Tue 7/21
6:00 am-3:25 pm
1 stop9h 25m
Cancun
Tue 7/28
3:05 pm-6:10 pm
Nonstop3h 05m
$388
St. LouisCancún
STL - CUN
STLCUN
Lambert-St Louis
Wed 7/22
6:21 am-1:00 pm
1 stop6h 39m
Cancun
Fri 7/31
12:35 pm-11:53 pm
2 stops11h 18m
$509
St. LouisCancún
STL - CUN
STLCUN
Lambert-St Louis
Thu 7/9
8:10 am-4:10 pm
2 stops8h 00m
Cancun
Sun 7/12
4:50 pm-11:55 pm
1 stop7h 05m
$518
St. LouisCancún
STL - CUN
STLCUN
Lambert-St Louis
Fri 7/10
6:21 am-1:00 pm
1 stop6h 39m
Cancun
Sat 7/11
2:10 pm-10:03 pm
1 stop7h 53m
$518
St. LouisCancún
STL - CUN
STLCUN
Lambert-St Louis
Fri 7/10
10:51 am-8:23 pm
1 stop9h 32m
Cancun
Tue 7/14
12:35 pm-11:53 pm
2 stops11h 18m
$523
St. LouisCancún
STL - CUN
STLCUN
Lambert-St Louis
Tue 8/11
7:00 am-7:30 pm
2 stops12h 30m
Cancun
Tue 8/18
11:16 am-11:21 pm
2 stops12h 05m
$528
St. LouisCancún
STL - CUN
STLCUN
Lambert-St Louis
Tue 8/18
6:00 am-6:39 pm
2 stops12h 39m
Cancun
Tue 8/25
8:05 am-2:33 pm
1 stop6h 28m
$529
St. LouisCancún
STL - CUN
STLCUN
Lambert-St Louis
Wed 7/8
8:00 am-2:26 pm
1 stop6h 26m
Cancun
Sat 7/11
7:51 am-9:26 pm
2 stops13h 35m
$568
St. LouisCancún
STL - CUN
STLCUN
Lambert-St Louis
Thu 7/16
6:01 am-1:39 pm
1 stop7h 38m
Cancun
Thu 7/23
3:24 pm-8:39 am
2 stops17h 15m
$569
St. LouisCancún
STL - CUN
STLCUN
Lambert-St Louis
Thu 7/2
5:05 am-1:40 pm
2 stops8h 35m
Cancun
Mon 7/6
11:45 am-9:00 pm
1 stop9h 15m
$598
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 June.
| 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 Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*1 star | |
| Price Accuracy3 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 41 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 $324). Flying from St. Louis to Cancún in May is currently the most expensive (average of $571). 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 June 4, 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 June 4, 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.
Crew
8.6
Entertainment
7.5
Boarding
8.1
Food
7.0
Comfort
8.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Crew
8.6
Entertainment
7.5
Boarding
8.1
Food
7.0
Comfort
8.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Crew
8.6
Entertainment
7.5
Boarding
8.1
Food
7.0
Comfort
8.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Crew
8.6
Entertainment
7.5
Boarding
8.1
Food
7.0
Comfort
8.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Crew
8.6
Entertainment
7.5
Boarding
8.1
Food
7.0
Comfort
8.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Crew
8.6
Entertainment
7.5
Boarding
8.1
Food
7.0
Comfort
8.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
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 June 4, 2026.
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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 June 4, 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 June 4, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 8 airlines flying from St. Louis to Cancún
Discover the top 8 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 June 4, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$168 | Average$472 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$180 | Average$377 | FlexibilityNo cancel fee | On-time79% | |
| Cheapest$224 | Average$418 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$236 | Average$475 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$330 | Average$561 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$404 | Average$468 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$416 | Average$638 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$470 | Average$636 | FlexibilityNo cancel fee | On-time63% |