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Cheap flights from Mexico City to St. Louis from $252

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 City to St. Louis departing on 1/8. 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 Mexico City to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
8:10 am - 2:46 pm
MEX
-
STL
30h 36m1 stop
Multiple Airlines Logo
9:45 pm - 12:10 am
STL
-
MEX
26h 25m2 stops
$356Multiple Airlines
Tue, Jan 27 - Mon, Feb 2
Multiple Airlines Logo
8:10 am - 2:46 pm
MEX
-
STL
30h 36m1 stop
Multiple Airlines Logo
8:22 pm - 10:00 pm
STL
-
MEX
25h 38m2 stops
$362Multiple Airlines
Tue, Jan 27 - Sat, Feb 7
Multiple Airlines Logo
11:00 am - 11:39 am
MEX
-
STL
24h 39m1 stop
Multiple Airlines Logo
3:43 pm - 10:30 pm
STL
-
MEX
30h 47m2 stops
$431Multiple Airlines
Sat, Jan 10 - Sat, Jan 17
Multiple Airlines Logo
6:30 am - 5:04 pm
MEX
-
STL
10h 34m1 stop
Multiple Airlines Logo
7:00 am - 7:20 pm
STL
-
MEX
12h 20m1 stop
$457Multiple Airlines
Sat, Jan 10 - Sat, Jan 17
Frontier Logo
11:10 am - 11:59 pm
MEX
-
STL
12h 49m1 stop
Frontier Logo
6:00 am - 5:15 pm
STL
-
MEX
11h 15m1 stop
$463Frontier
Thu, Feb 19 - Mon, Feb 23
Frontier Logo
11:10 am - 11:19 pm
MEX
-
STL
11h 09m1 stop
Frontier Logo
6:00 am - 5:15 pm
STL
-
MEX
12h 15m1 stop
$473Frontier
Mon, Mar 16 - Tue, Mar 24
Frontier Logo
11:55 am - 8:40 am
MEX
-
STL
20h 45m2 stops
Frontier Logo
3:43 pm - 5:25 am
STL
-
MEX
13h 42m2 stops
$479Frontier
Sat, Jan 10 - Sat, Jan 17
United Airlines Logo
9:05 am - 8:26 pm
MEX
-
STL
11h 21m1 stop
United Airlines Logo
11:25 am - 12:10 am
STL
-
MEX
12h 45m2 stops
$504United Airlines
Thu, Feb 19 - Mon, Feb 23
United Airlines Logo
9:05 am - 4:58 pm
MEX
-
STL
7h 53m1 stop
United Airlines Logo
6:00 am - 12:15 pm
STL
-
MEX
6h 15m1 stop
$507United Airlines
Thu, Feb 19 - Mon, Feb 23
United Airlines Logo
5:45 am - 5:18 pm
MEX
-
STL
11h 33m2 stops
United Airlines Logo
9:57 am - 6:55 pm
STL
-
MEX
8h 58m2 stops
$525United Airlines
Tue, Jan 27 - Sat, Feb 7

Frontier flights from Mexico City to St. Louis

Our best Frontier deals on Mexico City to St. Louis flight tickets
Frontier
Feb 19
MEX11:10 amMexico City Benito Juarez
12h 49m
1 stop
STL11:59 pmLambert-St Louis
Feb 23
STL6:00 amLambert-St Louis
11h 15m
1 stop
MEX5:15 pmMexico City Benito Juarez
$463
Find similar
Frontier
Mar 16
MEX11:10 amMexico City Benito Juarez
11h 09m
1 stop
STL11:19 pmLambert-St Louis
Mar 24
STL6:00 amLambert-St Louis
12h 15m
1 stop
MEX5:15 pmMexico City Benito Juarez
$473
Find similar
Frontier
Jan 10
MEX11:55 amMexico City Benito Juarez
20h 45m
2 stops
STL8:40 amLambert-St Louis
Jan 17
STL3:43 pmLambert-St Louis
13h 42m
2 stops
MEX5:25 amMexico City Benito Juarez
$479
Find similar

United Airlines flights from Mexico City to St. Louis

Our best United Airlines deals on Mexico City to St. Louis flight tickets
United Airlines
Feb 19
MEX2:40 pmMexico City Benito Juarez
8h 19m
1 stop
STL10:59 pmLambert-St Louis
Feb 23
STL4:39 pmLambert-St Louis
7h 31m
1 stop
MEX12:10 amMexico City Benito Juarez
$504
Find similar
United Airlines
Feb 19
MEX10:05 amMexico City Benito Juarez
12h 09m
1 stop
STL10:14 pmLambert-St Louis
Feb 23
STL11:25 amLambert-St Louis
12h 45m
2 stops
MEX12:10 amMexico City Benito Juarez
$507
Find similar
United Airlines
Dec 29
MEX10:05 amMexico City Benito Juarez
12h 38m
2 stops
STL10:43 pmLambert-St Louis
Jan 15
STL6:40 pmLambert-St Louis
15h 25m
2 stops
MEX10:05 amMexico City Benito Juarez
$593
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Mexico City 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 December 15, 2025.
Use the filters below to find and compare flights from Mexico City to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

Tue 1/27

8:10 am-2:46 pm

1 stop30h 36m

Lambert-St Louis

Mon 2/2

9:45 pm-12:10 am

2 stops26h 25m

$356

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

Tue 1/27

8:10 am-2:46 pm

1 stop30h 36m

Lambert-St Louis

Sat 2/7

8:22 pm-10:00 pm

2 stops25h 38m

$362

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

Sat 1/10

11:00 am-11:39 am

1 stop24h 39m

Lambert-St Louis

Sat 1/17

3:43 pm-10:30 pm

2 stops30h 47m

$431

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

Sat 1/10

6:30 am-5:04 pm

1 stop10h 34m

Lambert-St Louis

Sat 1/17

7:00 am-7:20 pm

1 stop12h 20m

$457

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

Thu 2/19

11:10 am-11:59 pm

1 stop12h 49m

Lambert-St Louis

Mon 2/23

6:00 am-5:15 pm

1 stop11h 15m

$463

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

Mon 3/16

11:10 am-11:19 pm

1 stop11h 09m

Lambert-St Louis

Tue 3/24

6:00 am-5:15 pm

1 stop12h 15m

$473

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

Sat 1/10

11:55 am-8:40 am

2 stops20h 45m

Lambert-St Louis

Sat 1/17

3:43 pm-5:25 am

2 stops13h 42m

$479

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

Thu 2/19

9:05 am-8:26 pm

1 stop11h 21m

Lambert-St Louis

Mon 2/23

11:25 am-12:10 am

2 stops12h 45m

$504

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

Thu 2/19

9:05 am-4:58 pm

1 stop7h 53m

Lambert-St Louis

Mon 2/23

6:00 am-12:15 pm

1 stop6h 15m

$507

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

Tue 1/27

5:45 am-5:18 pm

2 stops11h 33m

Lambert-St Louis

Sat 2/7

9:57 am-6:55 pm

2 stops8h 58m

$525

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 City 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 month to fly to St. Louis?

In general, September is the cheapest month to fly from Mexico City to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $507. The month of March is another great option to travel to St. Louis, with average flight prices from Mexico City averaging around $537.

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 Wednesday when prices can be found for as low as $465. 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 Saturday because tickets tend to average around $778. 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 City at noon is the least expensive time of day to depart. momondo users have found prices as low as $465 when looking at flights departing at noon. In the afternoon is when there is more demand to fly to St. Louis, so prices are often more expensive at around $695 per ticket.

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

As of December 2025, prices for Mexico City to St. Louis flights are approximately 31% more expensive when compared to flights at the same time last year.

When to book flights from Mexico City to St. Louis

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

Cheap Mexico City to St. Louis (MEX to STL) flight deals and tips

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

Fastest flight time

8h 28m

Direct flights

None
The fastest flight from Mexico City to St. Louis takes 8h 28m
There are no direct flights from Mexico City to St. Louis. There are no popular flight routes from Mexico City to St. Louis.
Search flight deals

  • How far is Mexico City Benito Juarez to Lambert-St Louis by plane?

    The distance between Mexico City Benito Juarez and Lambert-St Louis is about 1430.3 mi. A reasonable flight in good conditions will take 8h 28m.

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

    Prices for flights from Mexico City Benito Juarez Airport to Lambert-St Louis Airport were last updated today.

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

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Mexico City Benito Juarez Airport to Lambert-St Louis Airport.

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

    The travel and health documents required for your trip to Lambert-St Louis 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 Lambert-St Louis Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

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

Best airlines flying from Mexico City to St. Louis

Compare and see reviews for airlines that fly from Mexico City to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $466Free CancellationRating
7.4
9,092 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
Maryland Heights
O'Fallon
Florissant
Fenton
Wentzville
St. Peters
Collinsville
Alton
Farmington
Festus
Clayton
Glencoe
Edwardsville
Eureka
Litchfield
Shrewsbury

Why use momondo?

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

Finding the right flight to St. Louis from Mexico City 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 City to St. Louis with flexible booking policies on momondo?

Yes. All flights to St. Louis from Mexico City on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

momondo provides multiple filters to help you find the best flight to St. Louis from Mexico City. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Of course. momondo tracks the price of Mexico City to St. Louis flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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