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Cheap flights from Cancún to St. Louis from $142

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Cancún to St. Louis departing on 4/18. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Find the cheapest flights from Cancún to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
4:07 pm - 6:50 am
CUN
-
STL
14h 43m
1 stop
Frontier Logo
11:28 am - 2:56 pm
STL
-
CUN
27h 28m
1 stop
$256Frontier
Thu, Apr 30 - Sun, May 3
Frontier Logo
11:48 am - 3:19 pm
CUN
-
STL
3h 31mnonstop
Frontier Logo
6:00 am - 9:17 am
STL
-
CUN
3h 17mnonstop
$272Frontier
Fri, Apr 24 - Tue, Apr 28
Frontier Logo
11:48 am - 3:19 pm
CUN
-
STL
3h 31mnonstop
Frontier Logo
6:00 am - 9:17 am
STL
-
CUN
3h 17mnonstop
$273Frontier
Fri, Apr 24 - Tue, Apr 28
Frontier Logo
4:07 pm - 6:50 am
CUN
-
STL
14h 43m
1 stop
Frontier Logo
8:23 pm - 2:56 pm
STL
-
CUN
18h 33m
1 stop
$280Frontier
Thu, Apr 16 - Sat, Apr 18
Frontier Logo
11:48 am - 3:19 pm
CUN
-
STL
3h 31mnonstop
Frontier Logo
6:00 am - 9:17 am
STL
-
CUN
3h 17mnonstop
$299Frontier
Thu, Apr 30 - Sun, May 3
United Airlines Logo
12:55 pm - 9:13 pm
CUN
-
STL
8h 18m
1 stop
United Airlines Logo
8:15 pm - 10:06 am
STL
-
CUN
13h 51m
2 stops
$306United Airlines
Fri, Apr 17 - Mon, Apr 20
United Airlines Logo
12:11 pm - 9:52 pm
CUN
-
STL
9h 41m
1 stop
United Airlines Logo
6:00 am - 12:33 pm
STL
-
CUN
6h 33m
1 stop
$307United Airlines
Fri, Apr 17 - Mon, Apr 20
Aeromexico Logo
8:00 am - 5:44 pm
CUN
-
STL
9h 44m
1 stop
Aeromexico Logo
1:02 pm - 8:15 pm
STL
-
CUN
7h 13m
1 stop
$308Aeromexico
Fri, Apr 24 - Tue, Apr 28
United Airlines Logo
12:11 pm - 9:13 pm
CUN
-
STL
9h 02m
1 stop
United Airlines Logo
6:00 am - 7:19 pm
STL
-
CUN
13h 19m
1 stop
$309United Airlines
Fri, Apr 24 - Tue, Apr 28
Delta Logo
8:06 am - 9:19 pm
CUN
-
STL
13h 13m
2 stops
Delta Logo
6:00 am - 2:01 pm
STL
-
CUN
8h 01m
1 stop
$318Delta
Thu, Apr 30 - Sun, May 3

United Airlines flights from Cancún to St. Louis

Our best United Airlines deals on Cancún to St. Louis flight tickets
United Airlines
Apr 17
CUN12:55 pmCancun
8h 18m
1 stop
STL9:13 pmLambert-St Louis
Apr 20
STL8:15 pmLambert-St Louis
13h 51m
2 stops
CUN10:06 amCancun
$306
United Airlines
Apr 17
CUN12:11 pmCancun
9h 41m
1 stop
STL9:52 pmLambert-St Louis
Apr 20
STL6:00 amLambert-St Louis
6h 33m
1 stop
CUN12:33 pmCancun
$307
United Airlines
Apr 24
CUN12:11 pmCancun
9h 02m
1 stop
STL9:13 pmLambert-St Louis
Apr 28
STL6:00 amLambert-St Louis
13h 19m
1 stop
CUN7:19 pmCancun
$309

Delta flights from Cancún to St. Louis

Our best Delta deals on Cancún to St. Louis flight tickets
Delta
Apr 30
CUN8:06 amCancun
13h 13m
2 stops
STL9:19 pmLambert-St Louis
May 3
STL6:00 amLambert-St Louis
8h 01m
1 stop
CUN2:01 pmCancun
$318
Delta
Apr 23
CUN8:06 amCancun
13h 13m
2 stops
STL9:19 pmLambert-St Louis
Apr 30
STL9:59 amLambert-St Louis
10h 16m
1 stop
CUN8:15 pmCancun
$341
Delta
May 7
CUN6:03 amCancun
10h 07m
2 stops
STL4:10 pmLambert-St Louis
May 14
STL7:15 amLambert-St Louis
13h 01m
1 stop
CUN8:16 pmCancun
$394

momondo 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, momondo users made 832,500 searches. Data last updated March 27, 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

Price

Cheapest round-trip

CancúnSt. Louis

CUN - STL

CUNSTL

Cancun

Thu 4/30

4:07 pm-6:50 am

1 stop14h 43m

Lambert-St Louis

Sun 5/3

11:28 am-2:56 pm

1 stop27h 28m

$256
Quickest round-trip

CancúnSt. Louis

CUN - STL

CUNSTL

Cancun

Fri 4/24

11:48 am-3:19 pm

Nonstop3h 31m

Lambert-St Louis

Tue 4/28

6:00 am-9:17 am

Nonstop3h 17m

$272

CancúnSt. Louis

CUN - STL

CUNSTL

Cancun

Fri 4/24

11:48 am-3:19 pm

Nonstop3h 31m

Lambert-St Louis

Tue 4/28

6:00 am-9:17 am

Nonstop3h 17m

$273

CancúnSt. Louis

CUN - STL

CUNSTL

Cancun

Thu 4/16

4:07 pm-6:50 am

1 stop14h 43m

Lambert-St Louis

Sat 4/18

8:23 pm-2:56 pm

1 stop18h 33m

$280

CancúnSt. Louis

CUN - STL

CUNSTL

Cancun

Thu 4/30

11:48 am-3:19 pm

Nonstop3h 31m

Lambert-St Louis

Sun 5/3

6:00 am-9:17 am

Nonstop3h 17m

$299

CancúnSt. Louis

CUN - STL

CUNSTL

Cancun

Fri 4/17

12:55 pm-9:13 pm

1 stop8h 18m

Lambert-St Louis

Mon 4/20

8:15 pm-10:06 am

2 stops13h 51m

$306

CancúnSt. Louis

CUN - STL

CUNSTL

Cancun

Fri 4/17

12:11 pm-9:52 pm

1 stop9h 41m

Lambert-St Louis

Mon 4/20

6:00 am-12:33 pm

1 stop6h 33m

$307

CancúnSt. Louis

CUN - STL

CUNSTL

Cancun

Fri 4/24

8:00 am-5:44 pm

1 stop9h 44m

Lambert-St Louis

Tue 4/28

1:02 pm-8:15 pm

1 stop7h 13m

$308

CancúnSt. Louis

CUN - STL

CUNSTL

Cancun

Fri 4/24

12:11 pm-9:13 pm

1 stop9h 02m

Lambert-St Louis

Tue 4/28

6:00 am-7:19 pm

1 stop13h 19m

$309

CancúnSt. Louis

CUN - STL

CUNSTL

Cancun

Thu 4/30

8:06 am-9:19 pm

2 stops13h 13m

Lambert-St Louis

Sun 5/3

6:00 am-2:01 pm

1 stop8h 01m

$318

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 St. Louis from

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

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 typical price of a round-trip flight between Cancún and St. Louis?

What is the cheapest day to depart on your flight to St. Louis?

The cheapest day to depart on your flight to St. Louis is on a Tuesday when prices can be found for as low as $189. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around $451. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

What is the cheapest time of day to depart on your flight to St. Louis?

Flying to St. Louis from Cancún in the morning is the least expensive time of day to depart. momondo users have found prices as low as $200 when looking at flights departing in the morning. In the afternoon is when there is more demand to fly to St. Louis, so prices are often more expensive at around $372 per ticket.

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

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

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

There is only 1 cabin class available to choose from on Cancun to Lambert-St Louis 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 Cancún to St. Louis flights?

No. A direct flight is the cheapest option for a flight between Cancún to St. Louis.

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

As of March 2026, prices for Cancún to St. Louis flights are approximately 13% cheaper when compared to flights at the same time last year.

When to book flights from Cancún to St. Louis

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

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

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

Fastest flight time

3h 31m

Direct flights

Every day

Airports in St. Louis

1 airport
The fastest flight from Cancún to St. Louis takes 3h 31m
Direct flights go from Cancún to St. Louis every day.
There is 1 airport in St. Louis. From Cancún there are direct flights to Lambert-St Louis (STL).
Search flight deals

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

    There are 1222.8 mi between Cancun and Lambert-St Louis. In terms of flight time, this usually takes a little over 3h 31m.

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

    Prices for flights from Cancun Airport to Lambert-St Louis Airport refresh daily.

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

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Cancun Airport to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The required travel and health documents for your Lambert-St Louis Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Lambert-St Louis Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

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

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Hermann
Fairview Heights
Florissant
Maryland Heights
O'Fallon
Collinsville
St. Peters
Wentzville
Alton
Fenton
Farmington
Clayton
Festus
Edwardsville
Eureka
Litchfield
Shrewsbury
Grafton

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Cancún to St. Louis for you.

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

Yes. momondo enables you to select and highlight flights to St. Louis from Cancún with this policy.

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

momondo helps you find the best flight between Cancún and St. Louis by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

If you are not ready to book a flight from Cancún to St. Louis now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to St. Louis and let you know when they change.

An easier way to manage your St. Louis trip

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