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Cheap flights from Mexico City to St. Louis from $228

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 4/17. 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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Find the cheapest flights from Mexico City to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
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
8:40 am - 7:21 pm
MEX
-
STL
9h 41m
1 stop
Frontier Logo
3:21 pm - 10:45 am
STL
-
MEX
20h 24m
2 stops
$365Frontier
Thu, Apr 16 - Mon, Apr 20
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
$375Frontier
Thu, Apr 16 - Mon, Apr 20
Frontier Logo
8:40 am - 7:21 pm
MEX
-
STL
9h 41m
1 stop
Frontier Logo
3:21 pm - 10:45 am
STL
-
MEX
20h 24m
2 stops
$382Frontier
Thu, Apr 23 - Mon, Apr 27
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
$383Frontier
Thu, Apr 23 - Mon, Apr 27
Frontier Logo
8:40 am - 7:21 pm
MEX
-
STL
9h 41m
1 stop
Frontier Logo
3:21 pm - 10:45 am
STL
-
MEX
20h 24m
2 stops
$392Frontier
Thu, Apr 23 - Mon, Apr 27
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
$411Frontier
Thu, Apr 16 - Mon, Apr 20
Multiple Airlines Logo
8:40 am - 7:23 pm
MEX
-
STL
9h 43m
1 stop
Multiple Airlines Logo
12:16 pm - 5:30 pm
STL
-
MEX
30h 14m
2 stops
$422Multiple Airlines
Thu, May 7 - Thu, May 14
Frontier Logo
8:40 am - 7:23 pm
MEX
-
STL
9h 43m
1 stop
Frontier Logo
3:33 pm - 10:45 pm
STL
-
MEX
8h 12m
1 stop
$437Frontier
Thu, Aug 6 - Mon, Aug 10
Frontier Logo
8:40 am - 7:23 pm
MEX
-
STL
9h 43m
1 stop
Frontier Logo
3:33 pm - 10:45 pm
STL
-
MEX
8h 12m
1 stop
$438Frontier
Thu, Aug 6 - Mon, Aug 10

Aeromexico flights from Mexico City to St. Louis

Our best Aeromexico deals on Mexico City to St. Louis flight tickets
Aeromexico
Aug 6
MEX8:50 amMexico City Benito Juarez
13h 48m
2 stops
STL11:38 pmLambert-St Louis
Aug 10
STL1:30 pmLambert-St Louis
6h 30m
1 stop
MEX7:00 pmMexico City Benito Juarez
$569
Aeromexico
Aug 6
MEX8:50 amMexico City Benito Juarez
14h 03m
2 stops
STL11:53 pmLambert-St Louis
Aug 10
STL11:51 amLambert-St Louis
10h 59m
2 stops
MEX9:50 pmMexico City Benito Juarez
$571
Aeromexico
Aug 6
MEX6:55 amMexico City Benito Juarez
15h 43m
2 stops
STL11:38 pmLambert-St Louis
Aug 10
STL9:00 amLambert-St Louis
13h 50m
2 stops
MEX9:50 pmMexico City Benito Juarez
$573

United Airlines flights from Mexico City to St. Louis

Our best United Airlines deals on Mexico City to St. Louis flight tickets
United Airlines
Aug 6
MEX4:40 amMexico City Benito Juarez
10h 06m
2 stops
STL3:46 pmLambert-St Louis
Aug 10
STL8:35 amLambert-St Louis
8h 05m
1 stop
MEX3:40 pmMexico City Benito Juarez
$570
United Airlines
Aug 6
MEX4:40 amMexico City Benito Juarez
15h 46m
2 stops
STL9:26 pmLambert-St Louis
Aug 10
STL1:38 pmLambert-St Louis
10h 32m
2 stops
MEX11:10 pmMexico City Benito Juarez
$572
United Airlines
Aug 6
MEX9:35 amMexico City Benito Juarez
10h 51m
2 stops
STL9:26 pmLambert-St Louis
Aug 10
STL1:38 pmLambert-St Louis
10h 32m
2 stops
MEX11:10 pmMexico City Benito Juarez
$574

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 March 24, 2026.
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

Cheapest round-trip

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

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

Thu 4/16

8:40 am-7:21 pm

1 stop9h 41m

Lambert-St Louis

Mon 4/20

3:21 pm-10:45 am

2 stops20h 24m

$365

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

Thu 4/16

8:40 am-7:21 pm

1 stop9h 41m

Lambert-St Louis

Mon 4/20

3:21 pm-10:45 pm

1 stop8h 24m

$375

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 am

2 stops20h 24m

$382

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

$383

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 am

2 stops20h 24m

$392

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

Thu 4/16

8:40 am-7:21 pm

1 stop9h 41m

Lambert-St Louis

Mon 4/20

3:21 pm-10:45 pm

1 stop8h 24m

$411

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

Thu 5/7

8:40 am-7:23 pm

1 stop9h 43m

Lambert-St Louis

Thu 5/14

12:16 pm-5:30 pm

2 stops30h 14m

$422
Quickest round-trip

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

Thu 8/6

8:40 am-7:23 pm

1 stop9h 43m

Lambert-St Louis

Mon 8/10

3:33 pm-10:45 pm

1 stop8h 12m

$437

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

Thu 8/6

8:40 am-7:23 pm

1 stop9h 43m

Lambert-St Louis

Mon 8/10

3:33 pm-10:45 pm

1 stop8h 12m

$438

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 October is another great option to travel to St. Louis, with average flight prices from Mexico City averaging around $565.

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

As of March 2026, prices for Mexico City to St. Louis flights are approximately 26% 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

Fastest flight time

9h 43m

Direct flights

None
The fastest flight from Mexico City to St. Louis takes 9h 43m
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 9h 43m.

  • 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
9,469 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 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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