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Cheap flights from Mexico City to St. Louis from $214

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 12/9. 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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Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
11:10 am - 10:33 pmMEX-STL
11h 23m1 stop
Frontier Logo
10:42 am - 10:30 pmSTL-MEX
11h 48m2 stops
$435Frontier
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Wed, Dec 24 - Thu, Jan 15
Frontier Logo
11:10 am - 10:33 pmMEX-STL
11h 23m1 stop
Frontier Logo
10:42 am - 10:00 pmSTL-MEX
11h 18m2 stops
$447Frontier
Find Deal
Wed, Dec 24 - Sun, Jan 11
Multiple Airlines Logo
3:45 pm - 10:33 pmMEX-STL
30h 48m2 stops
Multiple Airlines Logo
5:44 pm - 8:05 pmSTL-MEX
26h 21m1 stop
$456Multiple Airlines
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Wed, Dec 24 - Mon, Jan 12
Multiple Airlines Logo
10:20 pm - 2:47 pmMEX-STL
16h 27m1 stop
Multiple Airlines Logo
5:06 pm - 10:30 pmSTL-MEX
29h 24m2 stops
$477Multiple Airlines
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Wed, Dec 24 - Tue, Jan 13
United Airlines Logo
5:45 am - 7:18 pmMEX-STL
13h 33m2 stops
United Airlines Logo
6:00 am - 12:15 pmSTL-MEX
6h 15m1 stop
$500United Airlines
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Thu, Dec 25 - Mon, Jan 12
Delta Logo
7:05 am - 9:40 pmMEX-STL
14h 35m1 stop
Delta Logo
6:55 pm - 11:50 amSTL-MEX
16h 55m2 stops
$521Delta
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Fri, Dec 26 - Sun, Jan 11
United Airlines Logo
5:45 am - 5:54 pmMEX-STL
12h 09m2 stops
United Airlines Logo
6:00 am - 12:15 pmSTL-MEX
6h 15m1 stop
$526United Airlines
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Mon, Dec 29 - Wed, Jan 14
Aeromexico Logo
10:00 am - 11:38 pmMEX-STL
13h 38m2 stops
Aeromexico Logo
10:13 am - 9:30 pmSTL-MEX
11h 17m2 stops
$552Aeromexico
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Tue, Mar 3 - Wed, Mar 4
Aeromexico Logo
10:30 am - 11:38 pmMEX-STL
13h 08m2 stops
Aeromexico Logo
10:13 am - 9:30 pmSTL-MEX
11h 17m2 stops
$553Aeromexico
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Tue, Mar 3 - Wed, Mar 4
Delta Logo
8:40 am - 9:40 pmMEX-STL
13h 00m2 stops
Delta Logo
7:10 am - 6:55 pmSTL-MEX
11h 45m2 stops
$651Delta
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Fri, Dec 26 - Sun, Jan 11

Frontier flights from Mexico City to St. Louis

Our best Frontier deals on Mexico City to St. Louis flight tickets
Frontier
Dec 24
MEX11:10 amMexico City Benito Juarez
11h 23m
1 stop
STL10:33 pmLambert-St Louis
Jan 15
STL10:42 amLambert-St Louis
11h 48m
2 stops
MEX10:30 pmMexico City Benito Juarez
$435
Find similar
Frontier
Dec 24
MEX11:10 amMexico City Benito Juarez
11h 23m
1 stop
STL10:33 pmLambert-St Louis
Jan 11
STL10:42 amLambert-St Louis
11h 18m
2 stops
MEX10:00 pmMexico City Benito Juarez
$447
Find similar
Frontier
Dec 24
MEX11:10 amMexico City Benito Juarez
11h 23m
1 stop
STL10:33 pmLambert-St Louis
Jan 9
STL10:42 amLambert-St Louis
11h 03m
2 stops
MEX9:45 pmMexico City Benito Juarez
$448
Find similar

Delta flights from Mexico City to St. Louis

Our best Delta deals on Mexico City to St. Louis flight tickets
Delta
Dec 25
MEX2:05 pmMexico City Benito Juarez
9h 33m
1 stop
STL11:38 pmLambert-St Louis
Jan 13
STL6:00 amLambert-St Louis
11h 05m
2 stops
MEX5:05 pmMexico City Benito Juarez
$500
Find similar
Delta
Dec 26
MEX7:05 amMexico City Benito Juarez
14h 35m
1 stop
STL9:40 pmLambert-St Louis
Jan 14
STL7:10 amLambert-St Louis
9h 55m
2 stops
MEX5:05 pmMexico City Benito Juarez
$521
Find similar
Delta
Dec 26
MEX8:40 amMexico City Benito Juarez
13h 00m
2 stops
STL9:40 pmLambert-St Louis
Jan 11
STL7:10 amLambert-St Louis
11h 45m
2 stops
MEX6:55 pmMexico City Benito Juarez
$651
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 November 5, 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

Wed 12/24

11:10 am-10:33 pm

1 stop11h 23m

Lambert-St Louis

Thu 1/15

10:42 am-10:30 pm

2 stops11h 48m

$435

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

Wed 12/24

11:10 am-10:33 pm

1 stop11h 23m

Lambert-St Louis

Sun 1/11

10:42 am-10:00 pm

2 stops11h 18m

$447

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

Wed 12/24

3:45 pm-10:33 pm

2 stops30h 48m

Lambert-St Louis

Mon 1/12

5:44 pm-8:05 pm

1 stop26h 21m

$456

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

Wed 12/24

10:20 pm-2:47 pm

1 stop16h 27m

Lambert-St Louis

Tue 1/13

5:06 pm-10:30 pm

2 stops29h 24m

$477

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

Thu 12/25

5:45 am-7:18 pm

2 stops13h 33m

Lambert-St Louis

Mon 1/12

6:00 am-12:15 pm

1 stop6h 15m

$500

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

Fri 12/26

7:05 am-9:40 pm

1 stop14h 35m

Lambert-St Louis

Sun 1/11

6:55 pm-11:50 am

2 stops16h 55m

$521

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

Mon 12/29

5:45 am-5:54 pm

2 stops12h 09m

Lambert-St Louis

Wed 1/14

6:00 am-12:15 pm

1 stop6h 15m

$526

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

Tue 3/3

10:00 am-11:38 pm

2 stops13h 38m

Lambert-St Louis

Wed 3/4

10:13 am-9:30 pm

2 stops11h 17m

$552

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

Tue 3/3

10:30 am-11:38 pm

2 stops13h 08m

Lambert-St Louis

Wed 3/4

10:13 am-9:30 pm

2 stops11h 17m

$553

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

Fri 12/26

8:40 am-9:40 pm

2 stops13h 00m

Lambert-St Louis

Sun 1/11

7:10 am-6:55 pm

2 stops11h 45m

$651

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, March 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 $449. The month of September is another great option to travel to St. Louis, with average flight prices from Mexico City averaging around $507.

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 November 2025, prices for Mexico City to St. Louis flights are approximately 4% cheaper 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

Direct flights

None
There are no direct flights from Mexico City to St. Louis. There are no popular flight routes from Mexico City to St. Louis.
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  • 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 03m.

  • 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 $501Free CancellationRating
7.4
9,002 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
Wentzville
Fenton
Collinsville
St. Peters
Alton
Farmington
Festus
Glencoe
Edwardsville
Clayton
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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