$209+ Cheap flights from Cancún (CUN) to St. Louis (STL)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/25. Fares are subject to change and may not be available on all flights or dates of travel.
CUN — STL
Nov 3 — Nov 101
Round-trip
1 adult, Economy
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Find cheap flights from Cancún to St. Louis 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.Cheap flight deals from Cancún to St. Louis
Cheapest
Best
Last-minute
One-way
Cheapest flights from Cancún to St. LouisExplore the most affordable flight options available from Cancún to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 4, 2026.
Explore the most affordable flight options available from Cancún to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 4, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 9/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2211:08 am -
Nonstop3h 17m
Mon 10/266:30 am -
Nonstop3h 09m
Deal found 9/30![Frontier logo]()
$392
This United Airlines deal was found by Cheapflights users on 9/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/223:38 pm -
1 stop7h 21m
Mon 10/265:00 am -
2 stops9h 24m
Deal found 9/30![United Airlines logo]()
$463
This Mytrip deal was found by Cheapflights users on 9/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/221:51 pm -
2 stops27h 07m
Mon 10/266:35 pm -
3 stops23h 39m
Deal found 9/30![Multiple Airlines logo]()
$499
This Cheapflightsfares deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1612:23 pm -
Nonstop3h 23m
Mon 11/306:00 am -
Nonstop3h 14m
Deal found 10/1![Frontier logo]()
$509
This Frontier deal was found by Cheapflights users on 9/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/1511:08 am -
Nonstop3h 17m
Mon 10/196:30 am -
Nonstop3h 09m
Deal found 9/29![Frontier logo]()
$584
This United Airlines deal was found by Cheapflights users on 9/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/157:51 am -
2 stops13h 30m
Mon 10/196:00 am -
1 stop7h 10m
Deal found 9/29![United Airlines logo]()
$599
Best flights from Cancún to St. LouisDiscover carefully curated flight deals from Cancún to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 4, 2026.
Discover carefully curated flight deals from Cancún to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 4, 2026.
This Delta deal was found by Cheapflights users on 9/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/222:25 pm -
1 stop6h 58m
Mon 10/262:25 pm -
1 stop5h 30m
Deal found 9/30![Delta logo]()
$463
This American Airlines deal was found by Cheapflights users on 9/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/912:59 pm -
Nonstop3h 28m
Sat 1/165:49 pm -
1 stop17h 12m
Deal found 9/30![American Airlines logo]()
$508
This Cheapflightsfares deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1612:23 pm -
Nonstop3h 23m
Mon 11/306:00 am -
Nonstop3h 14m
Deal found 10/1![Frontier logo]()
$509
This Mytrip deal was found by Cheapflights users on 9/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/221:20 pm -
1 stop29h 21m
Mon 10/266:35 pm -
3 stops23h 39m
Deal found 9/30![Multiple Airlines logo]()
$527
This United Airlines deal was found by Cheapflights users on 9/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/1512:11 pm -
1 stop10h 48m
Mon 10/198:35 am -
1 stop6h 02m
Deal found 9/29![United Airlines logo]()
$599
This Frontier deal was found by Cheapflights users on 9/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/911:50 am -
2 stops13h 14m
Sat 1/167:02 pm -
2 stops14h 18m
Deal found 9/30![Frontier logo]()
$596
This United Airlines deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/168:39 am -
1 stop14h 47m
Mon 11/306:15 am -
1 stop6h 19m
Deal found 10/1![United Airlines logo]()
$605
Last-minute flights from Cancún to St. LouisDiscover last-minute flight deals from Cancún to St. Louis. Data last updated October 4, 2026 and is based on user searches.
Discover last-minute flight deals from Cancún to St. Louis. Data last updated October 4, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 9/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/1511:08 am -
Nonstop3h 17m
Mon 10/196:30 am -
Nonstop3h 09m
Deal found 9/29![Frontier logo]()
$584
This United Airlines deal was found by Cheapflights users on 9/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/157:51 am -
2 stops13h 30m
Mon 10/196:00 am -
1 stop7h 10m
Deal found 9/29![United Airlines logo]()
$599
This Cheapflightsfares deal was found by Cheapflights users on 9/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2211:08 am -
Nonstop3h 17m
Mon 10/266:30 am -
Nonstop3h 09m
Deal found 9/30![Frontier logo]()
$392
This United Airlines deal was found by Cheapflights users on 9/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/223:38 pm -
1 stop7h 21m
Mon 10/265:00 am -
2 stops9h 24m
Deal found 9/30![United Airlines logo]()
$463
This Mytrip deal was found by Cheapflights users on 9/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/221:51 pm -
2 stops27h 07m
Mon 10/266:35 pm -
3 stops23h 39m
Deal found 9/30![Multiple Airlines logo]()
$499
This Cheapflightsfares deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1612:23 pm -
Nonstop3h 23m
Mon 11/306:00 am -
Nonstop3h 14m
Deal found 10/1![Frontier logo]()
$509
One-way flights from Cancún to St. LouisSearch for one-way flight options from Cancún to St. Louis. Find affordable one-way fares based on user searches. Data last updated October 4, 2026.
Search for one-way flight options from Cancún to St. Louis. Find affordable one-way fares based on user searches. Data last updated October 4, 2026.
This Super.com deal was found by Cheapflights users on 9/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/2511:44 am -
1 stop6h 56m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/30![Frontier logo]()
$209
This Kiwi.com deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/311:28 am -
1 stop24h 49m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/1![Frontier logo]()
$217
This FlightHub deal was found by Cheapflights users on 9/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/291:51 pm -
1 stop27h 49m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/29![Frontier logo]()
$225
This Super.com deal was found by Cheapflights users on 9/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2811:23 am -
Nonstop3h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/29![Frontier logo]()
$231
This Kiwi.com deal was found by Cheapflights users on 10/3. 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.
Thu 11/52:51 pm -
1 stop27h 51m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/3![Frontier logo]()
$232
This Trip.com deal was found by Cheapflights users on 10/3. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/211:35 am -
1 stop28h 51m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/3![Air Canada logo]()
$233
This Kiwi.com deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/295:25 pm -
1 stop14h 44m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/1![Frontier logo]()
$237
Find flight deals from Cancún to St. Louis
Discover tips and strategies to find the most affordable flight options for your journey from Cancún (CUN) to St. Louis (STL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated October 4, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $392 (Cheapflightsfares) |
One-way from | $209 (Super.com) |
Good one-way deal | $309 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Cancún to St. Louis that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated October 4, 2026.
Use the filters below to find and compare flights from Cancún to St. Louis that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
CancúnSt. Louis
CUN Cancun - STL Lambert-St Louis
CUNSTL
Cancun
Wed 11/25
8:39 am-9:40 pm
2 stops14h 01m
Lambert-St Louis
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$267
CancúnSt. Louis
CUN Cancun - STL Lambert-St Louis
CUNSTL
Cancun
Wed 12/2
12:26 pm-11:26 pm
2 stops12h 00m
Lambert-St Louis
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$267
CancúnSt. Louis
CUN Cancun - STL Lambert-St Louis
CUNSTL
Cancun
Wed 10/28
1:44 pm-10:32 am
2 stops20h 48m
Lambert-St Louis
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$269
CancúnSt. Louis
CUN Cancun - STL Lambert-St Louis
CUNSTL
Cancun
Wed 12/30
12:10 pm-8:43 pm
1 stop9h 33m
Lambert-St Louis
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$283
CancúnSt. Louis
CUN Cancun - STL Lambert-St Louis
CUNSTL
Cancun
Tue 3/30
7:51 am-9:42 am
1 stop25h 51m
Lambert-St Louis
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$284
CancúnSt. Louis
CUN Cancun - STL Lambert-St Louis
CUNSTL
Cancun
Wed 3/17
11:28 am-9:13 pm
2 stops9h 45m
Lambert-St Louis
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$284
CancúnSt. Louis
CUN Cancun - STL Lambert-St Louis
CUNSTL
Cancun
Wed 3/31
3:24 pm-10:06 pm
1 stop6h 42m
Lambert-St Louis
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$284
CancúnSt. Louis
CUN Cancun - STL Lambert-St Louis
CUNSTL
Cancun
Thu 10/22
2:25 pm-9:23 pm
1 stop6h 58m
Lambert-St Louis
Mon 10/26
2:25 pm-7:55 pm
1 stop5h 30m
$463
CancúnSt. Louis
CUN Cancun - STL Lambert-St Louis
CUNSTL
Cancun
Sat 1/9
12:59 pm-3:27 pm
Nonstop3h 28m
Lambert-St Louis
Sat 1/16
5:49 pm-12:01 pm
1 stop17h 12m
$508
Quickest round-trip
CancúnSt. Louis
CUN Cancun - STL Lambert-St Louis
CUNSTL
Cancun
Mon 11/16
12:23 pm-2:46 pm
Nonstop3h 23m
Lambert-St Louis
Mon 11/30
6:00 am-10:14 am
Nonstop3h 14m
$509
Showing 1-10 of 14 resultsSorted by cheapest first
Compare providers for flights from Cancún to St. Louis
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 Cancún to St. Louis in October.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Cancún-St. Louis flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Cancún-St. Louis flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Cancún-St. Louis flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Cancún-St. Louis 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 Cancún-St. Louis 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 Cancún to St. Louis
Have a flexible travel schedule? Discover the best time to fly to St. Louis from Cancún with our price prediction graph.
CUN-STL
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 Cancún to St. Louis
The best insider tips for Cancún to St. Louis 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 Cancún to St. Louis trip
Our travel experts
Reviews of airlines servicing St. Louis
Get insights into the airlines that provide service to St. Louis. 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 St. Louis. Reviews last updated October 4, 2026.
See what other customers who have flown with Frontier from Cancún to St. Louis have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
4.2
Food
4.5
Comfort
5.4
Boarding
5.8
Crew
6.5
Overall
5.6
Reviews
1 / 20
2.0
MediocreDavid,Sep 2026
LAS - SAT
Entertainment
4.2
Food
4.5
Comfort
5.4
Boarding
5.8
Crew
6.5
Overall
5.6
Reviews
1 / 20
2.0
MediocreDavid,Sep 2026
LAS - SAT
Related info for your journey
Find useful and relevant information for your journey from Cancún to St. Louis. 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 St. Louis?
Book flights to St. Louis if you plan to visit one of these locationsFairview Heights
O'Fallon
Fenton
Swansea
Eureka
Wentzville
Chesterfield
Maryland Heights
Collinsville
Edwardsville
Glencoe
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Alternative routes for Cancún to St. Louis
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Complete your trip
Complete your trip to St. Louis by adding a car rental and/or hotel reservation to your travel itinerary.
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Find flights from Cancún to St. Louis, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Cancún and St. Louis flights
Browse other Cancún and St. Louis flight options. Last updated on October 4, 2026.
Other flights from Cancún
Browse through other flights departing from Cancún. Flights are based on user searches made on Cheapflights and were last updated on October 4, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to St. Louis
Explore flights to St. Louis departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on October 4, 2026.
Top airline flying from Cancún to St. Louis
Discover the top airline that operate flights from Cancún to St. Louis. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated October 4, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$298 | Average$588 | FlexibilityNo cancel fee | On-time62% |