$97+ 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 3/10. Fares are subject to change and may not be available on all flights or dates of travel.
STL — CUN
Mar 7 — Mar 141
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 18 days in advance, depart on a Monday or Wednesday and return on a Saturday
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 February 5, 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 February 5, 2026.
This Kiwi.com deal was found by Cheapflights users on 2/3. 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.
Wed 3/256:00 am
STL
- CUN
Nonstop3h 30m
Frontier
Tue 3/315:27 pm
CUN
- STL
2 stops41h 03m
Frontier
Deal found 2/3![Frontier logo]()
$324
This Frontier deal was found by Cheapflights users on 2/3. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/126:15 am
STL
- CUN
Nonstop3h 17m
Frontier
Tue 4/1411:44 am
CUN
- STL
Nonstop3h 31m
Frontier
Deal found 2/3![Frontier logo]()
$325
This Kiwi.com deal was found by Cheapflights users on 2/3. 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.
Sat 3/78:12 pm
STL
- CUN
1 stop14h 04m
Frontier
Thu 3/129:11 am
CUN
- STL
1 stop14h 08m
Frontier
Deal found 2/3![Frontier logo]()
$327
This Frontier deal was found by Cheapflights users on 2/3. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/276:00 am
STL
- CUN
Nonstop3h 17m
Frontier
Sat 5/22:36 pm
CUN
- STL
1 stop8h 43m
Frontier
Deal found 2/3![Frontier logo]()
$329
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
Mon 2/910:16 am
STL
- CUN
2 stops14h 20m
Multiple Airlines
Tue 2/102:24 pm
CUN
- STL
1 stop24h 34m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$330
This Expedia deal was found by Cheapflights users on 2/3. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/106:00 am
STL
- CUN
Nonstop3h 30m
Frontier
Mon 3/1612:15 pm
CUN
- STL
1 stop11h 04m
Frontier
Deal found 2/3![Frontier logo]()
$331
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
Mon 2/910:16 am
STL
- CUN
2 stops14h 20m
Multiple Airlines
Thu 2/122:49 pm
CUN
- STL
1 stop17h 02m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$333
This Orbitz deal was found by Cheapflights users on 2/3. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/156:00 am
STL
- CUN
Nonstop3h 17m
Frontier
Sat 4/1811:44 am
CUN
- STL
Nonstop3h 31m
Frontier
Deal found 2/3![Frontier logo]()
$334
This Frontier deal was found by Cheapflights users on 2/3. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/116:15 am
STL
- CUN
Nonstop3h 17m
Frontier
Fri 4/1711:44 am
CUN
- STL
Nonstop3h 31m
Frontier
Deal found 2/3![Frontier logo]()
$336
This Orbitz deal was found by Cheapflights users on 2/3. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/86:00 am
STL
- CUN
Nonstop3h 17m
Frontier
Tue 5/1211:44 am
CUN
- STL
Nonstop3h 31m
Frontier
Deal found 2/3![Frontier logo]()
$337
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 February 5, 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 February 5, 2026.
This Southwest deal was found by Cheapflights users on 2/2. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/36:50 am
STL
- CUN
1 stop7h 35m
Southwest
Tue 3/1012:55 pm
CUN
- STL
Nonstop3h 20m
Southwest
Deal found 2/2![Southwest logo]()
$375
This Frontier deal was found by Cheapflights users on 2/5. 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.
Sun 4/56:15 am
STL
- CUN
Nonstop3h 17m
Frontier
Thu 4/911:43 am
CUN
- STL
Nonstop3h 31m
Frontier
Deal found 2/5![Frontier logo]()
$378
This Delta deal was found by Cheapflights users on 2/3. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/86:00 am
STL
- CUN
2 stops12h 47m
Delta
Wed 3/118:00 am
CUN
- STL
1 stop9h 53m
Delta
Deal found 2/3![Delta logo]()
$386
This Delta deal was found by Cheapflights users on 2/1. 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 5/36:00 am
STL
- CUN
1 stop5h 30m
Delta
Thu 5/1412:35 pm
CUN
- STL
1 stop8h 49m
Delta
Deal found 2/1![Delta logo]()
$386
This Delta deal was found by Cheapflights users on 2/4. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/197:25 am
STL
- CUN
1 stop12h 49m
Delta
Fri 4/2412:25 pm
CUN
- STL
2 stops11h 09m
Delta
Deal found 2/4![Delta logo]()
$386
This Delta deal was found by Cheapflights users on 2/4. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/47:10 am
STL
- CUN
1 stop8h 35m
Delta
Wed 3/1112:35 pm
CUN
- STL
2 stops11h 23m
Delta
Deal found 2/4![Delta logo]()
$386
This Delta deal was found by Cheapflights users on 2/4. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/16:10 am
STL
- CUN
2 stops11h 37m
Delta
Fri 3/61:33 pm
CUN
- STL
2 stops11h 03m
Delta
Deal found 2/4![Delta logo]()
$386
This Delta deal was found by Cheapflights users on 2/5. 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 4/197:25 am
STL
- CUN
1 stop12h 49m
Delta
Thu 4/2312:30 pm
CUN
- STL
1 stop8h 12m
Delta
Deal found 2/5![Delta logo]()
$386
This Delta deal was found by Cheapflights users on 2/1. 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.
Tue 5/51:02 pm
STL
- CUN
1 stop7h 12m
Delta
Wed 5/139:55 am
CUN
- STL
1 stop7h 51m
Delta
Deal found 2/1![Delta logo]()
$386
This Delta deal was found by Cheapflights users on 2/2. 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.
Mon 5/49:59 am
STL
- CUN
2 stops25h 36m
Delta
Fri 5/88:15 am
CUN
- STL
1 stop15h 44m
Delta
Deal found 2/2![Delta logo]()
$390
Last-minute flights from St. Louis to CancúnDiscover last-minute flight deals from St. Louis to Cancún. Data last updated February 5, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Cancún. Data last updated February 5, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
Mon 2/910:16 am
STL
- CUN
2 stops14h 20m
Multiple Airlines
Tue 2/102:24 pm
CUN
- STL
1 stop24h 34m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$330
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
Mon 2/910:16 am
STL
- CUN
2 stops14h 20m
Multiple Airlines
Thu 2/122:49 pm
CUN
- STL
1 stop17h 02m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$333
This CheapOair deal was found by Cheapflights users on 2/3. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/224:05 pm
STL
- CUN
1 stop24h 55m
Multiple Airlines
Thu 2/2611:42 am
CUN
- STL
Nonstop3h 27m
Multiple Airlines
Deal found 2/3![Multiple Airlines logo]()
$340
This Frontier deal was found by Cheapflights users on 2/5. 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.
Sat 2/286:00 am
STL
- CUN
Nonstop3h 30m
Frontier
Thu 3/511:42 am
CUN
- STL
Nonstop3h 27m
Frontier
Deal found 2/5![Frontier logo]()
$339
This FlightHub deal was found by Cheapflights users on 2/2. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/48:17 pm
STL
- CUN
1 stop11h 34m
Frontier
Sat 3/72:22 pm
CUN
- STL
1 stop16h 35m
Frontier
Deal found 2/2![Frontier logo]()
$338
This Kiwi.com deal was found by Cheapflights users on 2/3. 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.
Sat 3/78:12 pm
STL
- CUN
1 stop14h 04m
Frontier
Thu 3/129:11 am
CUN
- STL
1 stop14h 08m
Frontier
Deal found 2/3![Frontier logo]()
$327
This Kiwi.com deal was found by Cheapflights users on 2/3. 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 3/92:09 pm
STL
- CUN
2 stops21h 11m
Multiple Airlines
Fri 3/1312:15 pm
CUN
- STL
1 stop11h 04m
Multiple Airlines
Deal found 2/3![Multiple Airlines logo]()
$335
This Kiwi.com deal was found by Cheapflights users on 2/3. 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 3/97:47 am
STL
- CUN
1 stop6h 46m
Frontier
Wed 3/1111:44 am
CUN
- STL
Nonstop3h 27m
Frontier
Deal found 2/3![Frontier logo]()
$336
This Expedia deal was found by Cheapflights users on 2/3. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/106:00 am
STL
- CUN
Nonstop3h 30m
Frontier
Mon 3/1612:15 pm
CUN
- STL
1 stop11h 04m
Frontier
Deal found 2/3![Frontier logo]()
$331
This Kiwi.com deal was found by Cheapflights users on 2/3. 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.
Wed 3/256:00 am
STL
- CUN
Nonstop3h 30m
Frontier
Tue 3/315:27 pm
CUN
- STL
2 stops41h 03m
Frontier
Deal found 2/3![Frontier logo]()
$324
This Kiwi.com deal was found by Cheapflights users on 2/3. 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 3/316:00 am
STL
- CUN
Nonstop3h 30m
Frontier
Fri 4/312:24 pm
CUN
- STL
2 stops46h 06m
Frontier
Deal found 2/3![Frontier logo]()
$337
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 February 5, 2026.
Search for one-way flight options from St. Louis to Cancún. Find affordable one-way fares based on user searches. Data last updated February 5, 2026.
This Super.com deal was found by Cheapflights users on 2/2. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/106:00 am
STL
- CUN
Nonstop3h 30m
Frontier
Deal found 2/2![Frontier logo]()
$97
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
Tue 3/316:00 am
STL
- CUN
Nonstop3h 30m
Frontier
Deal found 2/2![Frontier logo]()
$98
This Expedia deal was found by Cheapflights users on 2/3. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/256:00 am
STL
- CUN
Nonstop3h 30m
Frontier
Deal found 2/3![Frontier logo]()
$99
This Super.com deal was found by Cheapflights users on 2/3. 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.
Sun 5/36:00 am
STL
- CUN
Nonstop3h 17m
Frontier
Deal found 2/3![Frontier logo]()
$121
This Kiwi.com deal was found by Cheapflights users on 2/5. 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 4/216:00 am
STL
- CUN
Nonstop3h 17m
Frontier
Deal found 2/5![Frontier logo]()
$122
This Kiwi.com deal was found by Cheapflights users on 2/4. 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.
Mon 5/116:00 am
STL
- CUN
Nonstop3h 17m
Frontier
Deal found 2/4![Frontier logo]()
$123
This Priceline deal was found by Cheapflights users on 2/5. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/136:15 am
STL
- CUN
Nonstop3h 17m
Frontier
Deal found 2/5![Frontier logo]()
$124
This Super.com deal was found by Cheapflights users on 2/5. 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.
Mon 3/26:00 am
STL
- CUN
Nonstop3h 30m
Frontier
Deal found 2/5![Frontier logo]()
$125
This Frontier deal was found by Cheapflights users on 2/3. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/36:00 am
STL
- CUN
Nonstop3h 30m
Frontier
Deal found 2/3![Frontier logo]()
$126
This Travelocity deal was found by Cheapflights users on 2/3. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/258:17 pm
STL
- CUN
1 stop11h 34m
Frontier
Deal found 2/3![Frontier logo]()
$131
This Frontier deal was found by Cheapflights users on 2/3. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/288:17 pm
STL
- CUN
1 stop11h 34m
Frontier
Deal found 2/3![Frontier logo]()
$132
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 February 5, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $324 (Kiwi.com) |
One-way from | $97 (Super.com) |
Popular in | March |
Cheapest in | September |
Average price | $493 |
Good round-trip deal | $412 or less |
Good one-way deal | $238 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 February 5, 2026.
Use the filters below to find and compare flights from St. Louis to Cancún that are best for you.
Fly from
St. Louis
Fly to
Cancún
Route
Depart
Return
Price
St. LouisCancún
STL - CUN
STLCUN
Lambert-St Louis
Tue 3/3
6:50 am-3:25 pm
1 stop7h 35m
Cancun
Tue 3/10
12:55 pm-4:15 pm
Nonstop3h 20m
$375
St. LouisCancún
STL - CUN
STLCUN
Lambert-St Louis
Sun 4/5
6:15 am-9:32 am
Nonstop3h 17m
Cancun
Thu 4/9
11:43 am-3:14 pm
Nonstop3h 31m
$378
St. LouisCancún
STL - CUN
STLCUN
Lambert-St Louis
Sun 3/8
6:00 am-6:47 pm
2 stops12h 47m
Cancun
Wed 3/11
8:00 am-5:53 pm
1 stop9h 53m
$386
St. LouisCancún
STL - CUN
STLCUN
Lambert-St Louis
Sun 5/3
6:00 am-11:30 am
1 stop5h 30m
Cancun
Thu 5/14
12:35 pm-9:24 pm
1 stop8h 49m
$386
St. LouisCancún
STL - CUN
STLCUN
Lambert-St Louis
Sun 4/19
7:25 am-8:14 pm
1 stop12h 49m
Cancun
Fri 4/24
12:25 pm-11:34 pm
2 stops11h 09m
$386
St. LouisCancún
STL - CUN
STLCUN
Lambert-St Louis
Wed 3/4
7:10 am-4:45 pm
1 stop8h 35m
Cancun
Wed 3/11
12:35 pm-11:58 pm
2 stops11h 23m
$386
St. LouisCancún
STL - CUN
STLCUN
Lambert-St Louis
Sun 3/1
6:10 am-6:47 pm
2 stops11h 37m
Cancun
Fri 3/6
1:33 pm-11:36 pm
2 stops11h 03m
$386
St. LouisCancún
STL - CUN
STLCUN
Lambert-St Louis
Sun 4/19
7:25 am-8:14 pm
1 stop12h 49m
Cancun
Thu 4/23
12:30 pm-8:42 pm
1 stop8h 12m
$386
St. LouisCancún
STL - CUN
STLCUN
Lambert-St Louis
Tue 5/5
1:02 pm-8:14 pm
1 stop7h 12m
Cancun
Wed 5/13
9:55 am-5:46 pm
1 stop7h 51m
$386
St. LouisCancún
STL - CUN
STLCUN
Lambert-St Louis
Mon 5/4
9:59 am-11:35 am
2 stops25h 36m
Cancun
Fri 5/8
8:15 am-11:59 pm
1 stop15h 44m
$390
Showing 1-10 of 21 results
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 February.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*2 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*2 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| 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?
Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Cancún. Price data was last updated on January 30, 2026.
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 18 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, February is the cheapest month in which you can book a flight from St. Louis to Cancún (average of $158). Flying from St. Louis to Cancún in July is currently the most expensive (average of $226). 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 February 5, 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 February 5, 2026.
Get a feel of what it's like to fly with Southwest, United Airlines, and American 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.
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Food
7.0
Overall
8.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Food
7.0
Overall
8.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Food
7.0
Overall
8.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Food
7.0
Overall
8.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Food
7.0
Overall
8.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Food
7.0
Overall
8.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
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
Holbox
Punta Sam
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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 February 5, 2026.
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St. Louis and Cancún flights
Browse other St. Louis and Cancún flight options. Last updated on February 5, 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 February 5, 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 February 5, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$130 | Average$292 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$168 | Average$493 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$174 | Average$370 | FlexibilityNo cancel fee | On-time79% | |
| Cheapest$197 | Average$404 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$236 | Average$513 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$314 | Average$533 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$416 | Average$617 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$505 | Average$646 | FlexibilityNo cancel fee | On-time63% |