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Cheap flights from Mexico 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 Mexico 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
0 bags

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Find the cheapest flights from Mexico to St. Louis

Recent round-trip flight deals from Mexico to St. Louis

Enter your travel dates to find the best prices.
United Airlines Logo
1:43 pm - 10:27 pm
CUN
-
STL
8h 44m
1 stop
United Airlines Logo
6:00 am - 12:02 pm
STL
-
CUN
6h 02m
1 stop
$306United Airlines
Fri, Apr 17 - Mon, Apr 20
United Airlines Logo
3:38 pm - 11:11 pm
CUN
-
STL
7h 33m
1 stop
United Airlines Logo
8:15 pm - 10:06 am
STL
-
CUN
13h 51m
2 stops
$307United Airlines
Fri, Apr 17 - Mon, Apr 20
Frontier Logo
10:34 am - 11:19 pm
CUN
-
STL
12h 45m
2 stops
Frontier Logo
8:08 pm - 2:07 pm
STL
-
CUN
17h 59m
2 stops
$336Frontier
Mon, May 4 - Mon, May 11
Frontier Logo
8:40 am - 7:21 pm
MEX
-
STL
9h 41m
1 stop
Frontier Logo
3:21 pm - 10:45 pm
STL
-
MEX
8h 24m
1 stop
$345Frontier
Thu, Apr 23 - Mon, Apr 27
Frontier Logo
4:07 pm - 5:36 pm
CUN
-
STL
25h 29m
1 stop
Frontier Logo
5:27 pm - 2:07 pm
STL
-
CUN
20h 40m
1 stop
$364Frontier
Mon, May 4 - Mon, May 11
Multiple Airlines Logo
11:36 am - 8:55 am
CUN
-
STL
45h 19m
2 stops
Multiple Airlines Logo
5:27 pm - 2:07 pm
STL
-
CUN
20h 40m
1 stop
$378Multiple Airlines
Mon, May 4 - Mon, May 11
Multiple Airlines Logo
12:45 pm - 11:59 pm
CUN
-
STL
11h 14m
1 stop
Multiple Airlines Logo
1:05 pm - 9:00 pm
STL
-
CUN
7h 55m
1 stop
$389Multiple Airlines
Thu, May 7 - Thu, May 14
Delta Logo
6:03 am - 4:10 pm
CUN
-
STL
10h 07m
2 stops
Delta Logo
7:15 am - 8:16 pm
STL
-
CUN
13h 01m
1 stop
$394Delta
Thu, May 7 - Thu, May 14
Air Canada Logo
2:00 pm - 3:25 pm
CZM
-
STL
24h 25m
1 stop
Air Canada Logo
4:05 pm - 12:50 pm
STL
-
CZM
21h 45m
1 stop
$477Air Canada
Thu, Apr 9 - Sat, Apr 11
Air Canada Logo
9:10 am - 8:09 pm
MTY
-
STL
9h 59m
1 stop
Air Canada Logo
7:05 am - 8:30 pm
STL
-
MTY
14h 25m
1 stop
$521Air Canada
Fri, May 8 - Sat, May 9

United Airlines flights from Mexico to St. Louis

Our best United Airlines deals on Mexico to St. Louis flight tickets
United Airlines
Apr 17
CUN3:24 pmCancun
7h 03m
1 stop
STL10:27 pmLambert-St Louis
Apr 20
STL6:55 pmLambert-St Louis
17h 07m
2 stops
CUN12:02 pmCancun
$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 16
CUN3:24 pmCancun
7h 04m
1 stop
STL10:28 pmLambert-St Louis
Apr 18
STL6:30 amLambert-St Louis
12h 49m
2 stops
CUN7:19 pmCancun
$340

American Airlines flights from Mexico to St. Louis

Our best American Airlines deals on Mexico to St. Louis flight tickets
American Airlines
Jul 15
BJX6:35 amLeón Del Bajio
16h 21m
1 stop
STL11:56 pmLambert-St Louis
Jul 29
STL5:29 amLambert-St Louis
5h 21m
1 stop
BJX9:50 amLeón Del Bajio
$545
American Airlines
Apr 24
MTY2:15 pmMonterrey Gen Mariano Escobedo
17h 39m
1 stop
STL8:54 amLambert-St Louis
Apr 29
STL12:27 pmLambert-St Louis
8h 34m
1 stop
MTY8:01 pmMonterrey Gen Mariano Escobedo
$585
American Airlines
Jul 29
BJX6:35 amLeón Del Bajio
16h 21m
1 stop
STL11:56 pmLambert-St Louis
Oct 28
STL10:14 amLambert-St Louis
12h 34m
1 stop
BJX9:48 pmLeón Del Bajio
$596

momondo Fare Finder

 
Customize your flight search to find flights from Mexico 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 24, 2026.
Use the filters below to find and compare flights from Mexico to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

CancúnSt. Louis

CUN - STL

CUNSTL

Cancun

Fri 4/17

1:43 pm-10:27 pm

1 stop8h 44m

Lambert-St Louis

Mon 4/20

6:00 am-12:02 pm

1 stop6h 02m

$306

CancúnSt. Louis

CUN - STL

CUNSTL

Cancun

Fri 4/17

3:38 pm-11:11 pm

1 stop7h 33m

Lambert-St Louis

Mon 4/20

8:15 pm-10:06 am

2 stops13h 51m

$307

CancúnSt. Louis

CUN - STL

CUNSTL

Cancun

Mon 5/4

10:34 am-11:19 pm

2 stops12h 45m

Lambert-St Louis

Mon 5/11

8:08 pm-2:07 pm

2 stops17h 59m

$336

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

Thu 4/23

8:40 am-7:21 pm

1 stop9h 41m

Lambert-St Louis

Mon 4/27

3:21 pm-10:45 pm

1 stop8h 24m

$345

CancúnSt. Louis

CUN - STL

CUNSTL

Cancun

Mon 5/4

4:07 pm-5:36 pm

1 stop25h 29m

Lambert-St Louis

Mon 5/11

5:27 pm-2:07 pm

1 stop20h 40m

$364

CancúnSt. Louis

CUN - STL

CUNSTL

Cancun

Mon 5/4

11:36 am-8:55 am

2 stops45h 19m

Lambert-St Louis

Mon 5/11

5:27 pm-2:07 pm

1 stop20h 40m

$378

CancúnSt. Louis

CUN - STL

CUNSTL

Cancun

Thu 5/7

12:45 pm-11:59 pm

1 stop11h 14m

Lambert-St Louis

Thu 5/14

1:05 pm-9:00 pm

1 stop7h 55m

$389

CancúnSt. Louis

CUN - STL

CUNSTL

Cancun

Thu 5/7

6:03 am-4:10 pm

2 stops10h 07m

Lambert-St Louis

Thu 5/14

7:15 am-8:16 pm

1 stop13h 01m

$394

CozumelSt. Louis

CZM - STL

CZMSTL

Cozumel

Thu 4/9

2:00 pm-3:25 pm

1 stop24h 25m

Lambert-St Louis

Sat 4/11

4:05 pm-12:50 pm

1 stop21h 45m

$477

MonterreySt. Louis

MTY - STL

MTYSTL

Monterrey Gen Mariano Escobedo

Fri 5/8

9:10 am-8:09 pm

1 stop9h 59m

Lambert-St Louis

Sat 5/9

7:05 am-8:30 pm

1 stop14h 25m

$521

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 Mexico 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 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 Mexico in the morning is the least expensive time of day to depart. momondo users have found prices as low as $196 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 Mexico to Lambert-St Louis flight route?

Fly from Puerto Vallarta Ordaz to Lambert-St Louis for the best Mexico - Lambert-St Louis flight prices

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

There is only 1 cabin class available to choose from on Mexico 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 Mexico to St. Louis flights?

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

Cheap Mexico to St. Louis flight deals and tips

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

Fastest flight time

3h 26m

Direct flights

Every day

Airports in St. Louis

1 airport
The fastest flight from Mexico to St. Louis takes 3h 26m
Direct flights go from Mexico to St. Louis every day.
There is 1 airport in St. Louis. From Mexico there are direct flights to Lambert-St Louis (STL).
Search flight deals

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

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

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

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Mexico 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 Mexico to St. Louis?

Best airlines flying from Mexico to St. Louis

Compare and see reviews for airlines that fly from Mexico to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $441Free CancellationRating
7.4
9,469 reviews
Search United Airlines flights

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 Mexico to St. Louis?

Finding the right flight to St. Louis from Mexico is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to St. Louis quick and easy, saving you time and money.

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

Yes. momondo allows you to filter the results for Mexico to St. Louis flights to just show those with flexible booking policies.

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

Once you have performed a search for Mexico to St. Louis flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Yes momondo offers price alerts on flights to St. Louis from Mexico. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your St. Louis trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
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