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Cheap flights from St. Louis to Cancún from $120

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 10/28. 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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0 bags

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Find the cheapest flights from St. Louis to Cancún

Cheap round-trip flights

Frontier Logo
10:21 am - 1:34 pmSTL-CUN
3h 13mnonstop
Frontier Logo
2:49 pm - 6:10 pmCUN-STL
3h 21mnonstop
$264Frontier
Find Deal
Sun, Sep 7 - Thu, Sep 11
Spirit Airlines Logo
10:35 am - 12:59 pmSTL-CUN
26h 24m1 stop
Spirit Airlines Logo
9:40 am - 10:50 amCUN-STL
25h 10m1 stop
$303Spirit Airlines
Find Deal
Sun, Sep 14 - Sat, Sep 20
Frontier Logo
10:21 am - 1:34 pmSTL-CUN
3h 13mnonstop
Frontier Logo
2:49 pm - 6:10 pmCUN-STL
3h 21mnonstop
$304Frontier
Find Deal
Sun, Sep 14 - Sun, Sep 21
Frontier Logo
10:21 am - 1:34 pmSTL-CUN
3h 13mnonstop
Frontier Logo
2:49 pm - 6:10 pmCUN-STL
3h 21mnonstop
$325Frontier
Find Deal
Mon, Sep 8 - Sun, Sep 14
American Airlines Logo
6:05 am - 1:50 pmSTL-CUN
7h 45m1 stop
American Airlines Logo
7:50 am - 3:08 pmCUN-STL
7h 18m1 stop
$362American Airlines
Find Deal
Sun, Sep 7 - Thu, Sep 11
American Airlines Logo
8:49 am - 2:59 pmSTL-CUN
6h 10m1 stop
American Airlines Logo
11:45 am - 8:53 pmCUN-STL
9h 08m2 stops
$367American Airlines
Find Deal
Tue, Oct 7 - Tue, Oct 14
Logo
10:21 am - 1:34 pmSTL-CUN
3h 13mnonstop
Logo
2:07 pm - 10:50 amCUN-STL
20h 43m2 stops
$370
Find Deal
Mon, Sep 15 - Sat, Sep 20
Logo
5:40 pm - 8:09 amSTL-CUN
14h 29m1 stop
Logo
9:14 am - 11:47 pmCUN-STL
14h 33m1 stop
$391
Find Deal
Thu, Aug 14 - Sun, Aug 17
Delta Logo
7:00 am - 8:20 pmSTL-CUN
13h 20m1 stop
Delta Logo
2:00 pm - 11:09 pmCUN-STL
9h 09m1 stop
$404Delta
Find Deal
Sun, Sep 7 - Thu, Sep 11
United Airlines Logo
6:15 am - 12:02 pmSTL-CUN
5h 47m1 stop
United Airlines Logo
1:43 pm - 11:53 pmCUN-STL
10h 10m2 stops
$409United Airlines
Find Deal
Tue, Sep 16 - Tue, Sep 23

Frontier flights from St. Louis to Cancún

Our best Frontier deals on St. Louis to Cancún flight tickets
Frontier
Sep 7
STL10:21 amLambert-St Louis
3h 13m
CUN1:34 pmCancun
Sep 11
CUN2:49 pmCancun
3h 21m
STL6:10 pmLambert-St Louis
$264
Find similar
Frontier
Sep 14
STL10:21 amLambert-St Louis
3h 13m
CUN1:34 pmCancun
Sep 21
CUN2:49 pmCancun
3h 21m
STL6:10 pmLambert-St Louis
$304
Find similar
Frontier
Sep 8
STL10:21 amLambert-St Louis
3h 13m
CUN1:34 pmCancun
Sep 14
CUN2:49 pmCancun
3h 21m
STL6:10 pmLambert-St Louis
$325
Find similar

American Airlines flights from St. Louis to Cancún

Our best American Airlines deals on St. Louis to Cancún flight tickets
American Airlines
Sep 7
STL6:05 amLambert-St Louis
7h 45m
1 stop
CUN1:50 pmCancun
Sep 11
CUN7:50 amCancun
7h 18m
1 stop
STL3:08 pmLambert-St Louis
$362
Find similar
American Airlines
Oct 7
STL8:49 amLambert-St Louis
6h 10m
1 stop
CUN2:59 pmCancun
Oct 14
CUN11:45 amCancun
9h 08m
2 stops
STL8:53 pmLambert-St Louis
$367
Find similar
American Airlines
Oct 28
STL5:23 amLambert-St Louis
9h 57m
1 stop
CUN3:20 pmCancun
Nov 4
CUN3:32 pmCancun
9h 18m
1 stop
STL11:50 pmLambert-St Louis
$386
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 July 31, 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

Sun 9/7

10:21 am-1:34 pm

Nonstop3h 13m

Cancun

Thu 9/11

2:49 pm-6:10 pm

Nonstop3h 21m

$264

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Sun 9/14

10:35 am-12:59 pm

1 stop26h 24m

Cancun

Sat 9/20

9:40 am-10:50 am

1 stop25h 10m

$303

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Sun 9/14

10:21 am-1:34 pm

Nonstop3h 13m

Cancun

Sun 9/21

2:49 pm-6:10 pm

Nonstop3h 21m

$304

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Mon 9/8

10:21 am-1:34 pm

Nonstop3h 13m

Cancun

Sun 9/14

2:49 pm-6:10 pm

Nonstop3h 21m

$325

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Sun 9/7

6:05 am-1:50 pm

1 stop7h 45m

Cancun

Thu 9/11

7:50 am-3:08 pm

1 stop7h 18m

$362

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Tue 10/7

8:49 am-2:59 pm

1 stop6h 10m

Cancun

Tue 10/14

11:45 am-8:53 pm

2 stops9h 08m

$367

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Mon 9/15

10:21 am-1:34 pm

Nonstop3h 13m

Cancun

Sat 9/20

2:07 pm-10:50 am

2 stops20h 43m

$370

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Thu 8/14

5:40 pm-8:09 am

1 stop14h 29m

Cancun

Sun 8/17

9:14 am-11:47 pm

1 stop14h 33m

$391

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Sun 9/7

7:00 am-8:20 pm

1 stop13h 20m

Cancun

Thu 9/11

2:00 pm-11:09 pm

1 stop9h 09m

$404

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Tue 9/16

6:15 am-12:02 pm

1 stop5h 47m

Cancun

Tue 9/23

1:43 pm-11:53 pm

2 stops10h 10m

$409

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 April, then you should wait until August to fly from St. Louis, when ticket prices are also cheap, with an average price of $475.

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 Tuesday when prices can be found for as low as $474. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $548. 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 $864. 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 $522 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 $465 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 7% 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 July 2025, prices for St. Louis to Cancún flights are approximately 13% 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

$120

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 $120. The best round-trip flight deal from St. Louis to Cancún found on momondo in the last 72 hours is $264.
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 13m 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 $132Free CancellationRating
6.3
8,048 reviews
Search Spirit Airlines flights
VolarisPriceFrom $174Free CancellationRating
6.6
1,164 reviews
Search Volaris flights
FrontierPriceFrom $293Free CancellationRating
5.9
3,239 reviews
Search Frontier flights
AeromexicoPriceFrom $346Free CancellationRating
7.5
1,721 reviews
Search Aeromexico flights
DeltaPriceFrom $358Free CancellationRating
8.0
7,981 reviews
Search Delta flights
United AirlinesPriceFrom $449Free CancellationRating
7.4
8,900 reviews
Search United Airlines flights
American AirlinesPriceFrom $468Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
SouthwestPriceFrom $510Free CancellationRating
8.0
4,246 reviews
Search Southwest flights

  • Southwest Flights From St. Louis to Cancún

    Across 8 Southwest flights from St. Louis to Cancún this week, the average price was $671, with the best Southwest deals starting from $510 round-trip. 4,246 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 $293, round-trip. It should be noted that an average Frontier flight deal for this route in this time was higher, at $483 round-trip. Frontier operates 7 flights out of St. Louis into Cancún in an average week, so prices vary by time and availability. 3,239 Frontier reviews by users on momondo have scored the airline at 5.9/10.

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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