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Cheap flights from St. Louis to Cancún from $128

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Cancún departing on 1/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from St. Louis to Cancún

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
5:11 pm - 9:10 amSTL-CUN
14h 59m1 stop
Multiple Airlines Logo
10:15 am - 10:33 pmCUN-STL
13h 18m1 stop
$292Multiple Airlines
Find Deal
Tue, Jan 20 - Thu, Jan 29
Multiple Airlines Logo
5:11 pm - 9:10 amSTL-CUN
14h 59m1 stop
Multiple Airlines Logo
10:15 am - 10:33 pmCUN-STL
13h 18m1 stop
$293Multiple Airlines
Find Deal
Mon, Feb 2 - Fri, Feb 6
Frontier Logo
6:00 am - 10:23 amSTL-CUN
3h 23mnonstop
Frontier Logo
11:28 am - 1:50 pmCUN-STL
3h 22mnonstop
$299Frontier
Find Deal
Tue, Dec 2 - Sat, Dec 6
Multiple Airlines Logo
5:11 pm - 9:10 amSTL-CUN
14h 59m1 stop
Multiple Airlines Logo
10:37 am - 7:50 amCUN-STL
22h 13m2 stops
$314Multiple Airlines
Find Deal
Tue, Jan 20 - Thu, Jan 29
Frontier Logo
6:00 am - 10:23 amSTL-CUN
3h 23mnonstop
Frontier Logo
11:28 am - 1:50 pmCUN-STL
3h 22mnonstop
$318Frontier
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Sat, Dec 6 - Tue, Dec 9
Delta Logo
1:00 pm - 9:11 pmSTL-CUN
7h 11m1 stop
Delta Logo
11:18 am - 8:39 pmCUN-STL
10h 21m2 stops
$330Delta
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Wed, Jan 21 - Wed, Jan 28
Delta Logo
6:00 am - 8:00 pmSTL-CUN
13h 00m2 stops
Delta Logo
12:05 pm - 11:25 pmCUN-STL
12h 20m2 stops
$335Delta
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Wed, Jan 21 - Wed, Jan 28
American Airlines Logo
7:05 am - 11:29 amSTL-CUN
3h 24mnonstop
American Airlines Logo
8:45 am - 10:59 pmCUN-STL
15h 14m1 stop
$344American Airlines
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Sat, Jan 24 - Wed, Jan 28
Volaris Logo
6:00 am - 10:23 amSTL-CUN
3h 23mnonstop
Volaris Logo
12:26 pm - 2:47 pmCUN-STL
3h 21mnonstop
$346Volaris
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Sun, Dec 14 - Sun, Dec 21
American Airlines Logo
6:16 pm - 10:45 amSTL-CUN
15h 29m1 stop
American Airlines Logo
12:32 pm - 3:07 pmCUN-STL
3h 35mnonstop
$356American Airlines
Find Deal
Thu, Feb 19 - Sat, Feb 28

Frontier flights from St. Louis to Cancún

Our best Frontier deals on St. Louis to Cancún flight tickets
Frontier
Dec 2
STL6:00 amLambert-St Louis
3h 23m
CUN10:23 amCancun
Dec 6
CUN11:28 amCancun
3h 22m
STL1:50 pmLambert-St Louis
$299
Find similar
Frontier
Dec 6
STL6:00 amLambert-St Louis
3h 23m
CUN10:23 amCancun
Dec 9
CUN11:28 amCancun
3h 22m
STL1:50 pmLambert-St Louis
$318
Find similar
Frontier
Nov 29
STL6:15 amLambert-St Louis
3h 18m
CUN10:33 amCancun
Dec 6
CUN11:28 amCancun
3h 22m
STL1:50 pmLambert-St Louis
$329
Find similar

Delta flights from St. Louis to Cancún

Our best Delta deals on St. Louis to Cancún flight tickets
Delta
Jan 21
STL1:00 pmLambert-St Louis
7h 11m
1 stop
CUN9:11 pmCancun
Jan 28
CUN11:18 amCancun
10h 21m
2 stops
STL8:39 pmLambert-St Louis
$330
Find similar
Delta
Jan 21
STL6:00 amLambert-St Louis
13h 00m
2 stops
CUN8:00 pmCancun
Jan 28
CUN12:05 pmCancun
12h 20m
2 stops
STL11:25 pmLambert-St Louis
$335
Find similar
Delta
Jan 22
STL6:35 amLambert-St Louis
6h 25m
1 stop
CUN2:00 pmCancun
Jan 27
CUN1:33 pmCancun
11h 06m
2 stops
STL11:39 pmLambert-St Louis
$348
Find similar

momondo 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, momondo users made 832,500 searches. Data last updated October 30, 2025.
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

Price

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Tue 1/20

5:11 pm-9:10 am

1 stop14h 59m

Cancun

Thu 1/29

10:15 am-10:33 pm

1 stop13h 18m

$292

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Mon 2/2

5:11 pm-9:10 am

1 stop14h 59m

Cancun

Fri 2/6

10:15 am-10:33 pm

1 stop13h 18m

$293

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Tue 12/2

6:00 am-10:23 am

Nonstop3h 23m

Cancun

Sat 12/6

11:28 am-1:50 pm

Nonstop3h 22m

$299

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Tue 1/20

5:11 pm-9:10 am

1 stop14h 59m

Cancun

Thu 1/29

10:37 am-7:50 am

2 stops22h 13m

$314

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Sat 12/6

6:00 am-10:23 am

Nonstop3h 23m

Cancun

Tue 12/9

11:28 am-1:50 pm

Nonstop3h 22m

$318

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Wed 1/21

1:00 pm-9:11 pm

1 stop7h 11m

Cancun

Wed 1/28

11:18 am-8:39 pm

2 stops10h 21m

$330

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Wed 1/21

6:00 am-8:00 pm

2 stops13h 00m

Cancun

Wed 1/28

12:05 pm-11:25 pm

2 stops12h 20m

$335

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Sat 1/24

7:05 am-11:29 am

Nonstop3h 24m

Cancun

Wed 1/28

8:45 am-10:59 pm

1 stop15h 14m

$344

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Sun 12/14

6:00 am-10:23 am

Nonstop3h 23m

Cancun

Sun 12/21

12:26 pm-2:47 pm

Nonstop3h 21m

$346

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Thu 2/19

6:16 pm-10:45 am

1 stop15h 29m

Cancun

Sat 2/28

12:32 pm-3:07 pm

Nonstop3h 35m

$356

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Cancún from

How to get the cheapest flight ticket from St. Louis to Cancún

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Cancún?

If you don’t want to visit Cancún in September, then you should wait until October to fly from St. Louis, when ticket prices are also cheap, with an average price of $431.

What is the cheapest day to depart on your flight to Cancún?

The cheapest day to depart from St. Louis to Cancún is on a Monday when prices can be found for as low as $409. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $541. These prices are subject to change though, so be sure to set up a Price Alert for flights to Cancún.

What is the cheapest time of day to depart on your flight to Cancún?

Our most recent data shows that the best time of day to fly to Cancún is in the evening. Flights from St. Louis to Cancún during this time can be as low as $367. Flights to Cancún are more costly at noon, with an average ticket price of $810. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest Lambert-St Louis to Cancun flight route?

Fly from Lambert-St Louis to Cancun for the best Lambert-St Louis - Cancun flight prices

How far in advance should I book a flight to Cancún?

You are more likely to see cheaper flights to Cancún from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Cancún for around $494 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Cancún from St. Louis for as low as $389 on momondo.

What cabin class options are available on Lambert-St Louis to Cancun flights?

There are 2 cabin classes available to choose from on Lambert-St Louis to Cancun flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on St. Louis to Cancún flights?

You could potentially save up to 1% on your flight if you consider stops on a St. Louis to Cancún flight.

How have St. Louis to Cancún flight prices changed over time?

As of October 2025, prices for St. Louis to Cancún flights are approximately 122% more expensive when compared to flights at the same time last year.

When to book flights from St. Louis to Cancún

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Cancún according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap St. Louis to Cancún (STL to CUN) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Cancún

Best Price Found

$192

Fastest flight time

3h 10m

Direct flights

Every day

Airports in Cancún

1 airport
The best one-way flight to Cancún from St. Louis in the past 72 hours is $192. The best round-trip flight deal from St. Louis to Cancún found on momondo in the last 72 hours is $361.
The fastest flight from St. Louis to Cancún takes 3h 10m
Direct flights go from St. Louis to Cancún every day.
There is 1 airport near Cancún: Cancun (CUN)
Search flight deals

  • How far is Lambert-St Louis to Cancun by plane?

    Cancun is 1222.8 mi away from Lambert-St Louis. Typically, this will take 3h 18m by plane in normal conditions.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Cancun Airport?

    Prices for flights from Lambert-St Louis Airport to Cancun Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Cancun Airport?

  • How old do you have to be to fly from Lambert-St Louis Airport to Cancun Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Cancun Airport.

  • What documentation or ID do you need to fly to Cancun Airport?

    The travel and health documents required for your trip to Cancun Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Cancun Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from St. Louis to Cancún?

  • What is the most popular airline from St. Louis to Cancún?

Best airlines flying from St. Louis to Cancún

Compare and see reviews for airlines that fly from St. Louis to Cancún with momondo
Airline
Rating
Free Cancellation
Price
Spirit AirlinesPriceFrom $130Free CancellationRating
6.3
8,116 reviews
Search Spirit Airlines flights
VolarisPriceFrom $175Free CancellationRating
6.7
1,151 reviews
Search Volaris flights
FrontierPriceFrom $243Free CancellationRating
5.8
3,122 reviews
Search Frontier flights
AeromexicoPriceFrom $252Free CancellationRating
7.4
1,674 reviews
Search Aeromexico flights
DeltaPriceFrom $315Free CancellationRating
7.9
7,998 reviews
Search Delta flights
United AirlinesPriceFrom $443Free CancellationRating
7.4
8,998 reviews
Search United Airlines flights
American AirlinesPriceFrom $476Free CancellationRating
7.2
11,034 reviews
Search American Airlines flights
SouthwestPriceFrom $512Free CancellationRating
8.0
4,243 reviews
Search Southwest flights

  • Southwest Flights From St. Louis to Cancún

    Across 1 Southwest flight from St. Louis to Cancún this week, the average price was $663, with the best Southwest deals starting from $512 round-trip. 4,243 users have rated Southwest on momondo, with an average score of 8.0/10.

  • Frontier Flights From St. Louis to Cancún

    The best Frontier deal for St. Louis to Cancún flight tickets found on momondo in the last 72 hours was $243, round-trip. It should be noted that an average Frontier flight deal for this route in this time was higher, at $437 round-trip. Frontier operates 1 flight out of St. Louis into Cancún in an average week, so prices vary by time and availability. 3,123 Frontier reviews by users on momondo have scored the airline at 5.8/10.

Traveling to a place near Cancún?

Book flights to Cancún if you plan to visit one of these locations
Playa del Carmen
Isla Mujeres
Holbox
Puerto Morelos
Akumal
Puerto Aventuras
Valladolid
Punta Sam

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Cancún?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Cancún from St. Louis.

Can I find flights from St. Louis to Cancún with flexible booking policies on momondo?

All flight searches from St. Louis to Cancún on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from St. Louis to Cancún?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Cancún from St. Louis.

I’m not ready to book a flight from St. Louis to Cancún right now. Can momondo alert me if prices change?

Price alerts on flights to Cancún from St. Louis are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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