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Cheap flights from St. Louis to Mexico City from $296

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Mexico City departing on 1/4. 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 St. Louis to Mexico City

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
5:42 pm - 7:45 pm
STL
-
MEX
26h 03m1 stop
Multiple Airlines Logo
8:10 am - 2:46 pm
MEX
-
STL
30h 36m1 stop
$338Multiple Airlines
Tue, Jan 20 - Tue, Jan 27
Multiple Airlines Logo
5:42 pm - 7:45 pm
STL
-
MEX
26h 03m1 stop
Multiple Airlines Logo
8:10 am - 2:46 pm
MEX
-
STL
30h 36m1 stop
$340Multiple Airlines
Tue, Jan 20 - Tue, Jan 27
Multiple Airlines Logo
3:49 pm - 7:45 pm
STL
-
MEX
27h 56m1 stop
Multiple Airlines Logo
11:10 am - 10:27 pm
MEX
-
STL
11h 17m1 stop
$354Multiple Airlines
Tue, Feb 17 - Wed, Feb 25
Multiple Airlines Logo
3:49 pm - 7:45 pm
STL
-
MEX
27h 56m1 stop
Multiple Airlines Logo
8:10 am - 1:09 pm
MEX
-
STL
28h 59m1 stop
$367Multiple Airlines
Wed, Feb 18 - Sun, Feb 22
Multiple Airlines Logo
5:42 pm - 7:45 pm
STL
-
MEX
26h 03m1 stop
Multiple Airlines Logo
3:45 pm - 11:33 pm
MEX
-
STL
31h 48m2 stops
$368Multiple Airlines
Tue, Jan 20 - Tue, Jan 27
Multiple Airlines Logo
5:42 pm - 7:45 pm
STL
-
MEX
26h 03m1 stop
Multiple Airlines Logo
3:45 pm - 11:33 pm
MEX
-
STL
31h 48m2 stops
$369Multiple Airlines
Tue, Jan 20 - Tue, Jan 27
Multiple Airlines Logo
3:49 pm - 7:45 pm
STL
-
MEX
27h 56m1 stop
Multiple Airlines Logo
10:20 pm - 10:27 pm
MEX
-
STL
24h 07m2 stops
$375Multiple Airlines
Wed, Feb 18 - Mon, Feb 23
Multiple Airlines Logo
8:17 pm - 7:45 pm
STL
-
MEX
23h 28m2 stops
Multiple Airlines Logo
11:10 am - 10:27 pm
MEX
-
STL
11h 17m1 stop
$389Multiple Airlines
Wed, Feb 18 - Wed, Feb 25
Multiple Airlines Logo
3:49 pm - 7:45 pm
STL
-
MEX
27h 56m1 stop
Multiple Airlines Logo
11:55 am - 9:13 pm
MEX
-
STL
9h 18m1 stop
$390Multiple Airlines
Tue, Feb 17 - Mon, Feb 23
Multiple Airlines Logo
7:27 pm - 10:30 pm
STL
-
MEX
27h 03m2 stops
Multiple Airlines Logo
8:10 am - 2:46 pm
MEX
-
STL
30h 36m1 stop
$394Multiple Airlines
Fri, Jan 16 - Fri, Jan 23

Aeromexico flights from St. Louis to Mexico City

Our best Aeromexico deals on St. Louis to Mexico City flight tickets
Aeromexico
Jan 20
STL9:59 amLambert-St Louis
11h 21m
2 stops
MEX9:20 pmMexico City Benito Juarez
Jan 21
MEX8:40 amMexico City Benito Juarez
14h 57m
1 stop
STL11:37 pmLambert-St Louis
$448
Find similar
Aeromexico
Mar 5
STL7:10 amLambert-St Louis
13h 40m
1 stop
MEX8:50 pmMexico City Benito Juarez
Mar 9
MEX8:10 amMexico City Benito Juarez
14h 48m
2 stops
STL11:58 pmLambert-St Louis
$550
Find similar
Aeromexico
Feb 25
STL6:00 amLambert-St Louis
6h 55m
1 stop
MEX12:55 pmMexico City Benito Juarez
Mar 1
MEX11:05 amMexico City Benito Juarez
9h 38m
2 stops
STL8:43 pmLambert-St Louis
$570
Find similar

Frontier flights from St. Louis to Mexico City

Our best Frontier deals on St. Louis to Mexico City flight tickets
Frontier
Feb 5
STL10:01 pmLambert-St Louis
24h 29m
2 stops
MEX10:30 pmMexico City Benito Juarez
Feb 26
MEX8:10 amMexico City Benito Juarez
15h 49m
2 stops
STL11:59 pmLambert-St Louis
$465
Find similar
Frontier
Jan 20
STL6:00 amLambert-St Louis
11h 15m
1 stop
MEX5:15 pmMexico City Benito Juarez
Jan 21
MEX11:10 amMexico City Benito Juarez
12h 23m
1 stop
STL11:33 pmLambert-St Louis
$473
Find similar
Frontier
Feb 19
STL10:11 pmLambert-St Louis
24h 19m
2 stops
MEX10:30 pmMexico City Benito Juarez
Feb 23
MEX8:10 amMexico City Benito Juarez
15h 49m
2 stops
STL11:59 pmLambert-St Louis
$476
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Mexico City 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 21, 2025.
Use the filters below to find and compare flights from St. Louis to Mexico City that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisMexico City

STL - MEX

STLMEX

Lambert-St Louis

Tue 1/20

5:42 pm-7:45 pm

1 stop26h 03m

Mexico City Benito Juarez

Tue 1/27

8:10 am-2:46 pm

1 stop30h 36m

$338

St. LouisMexico City

STL - MEX

STLMEX

Lambert-St Louis

Tue 1/20

5:42 pm-7:45 pm

1 stop26h 03m

Mexico City Benito Juarez

Tue 1/27

8:10 am-2:46 pm

1 stop30h 36m

$340

St. LouisMexico City

STL - MEX

STLMEX

Lambert-St Louis

Tue 2/17

3:49 pm-7:45 pm

1 stop27h 56m

Mexico City Benito Juarez

Wed 2/25

11:10 am-10:27 pm

1 stop11h 17m

$354

St. LouisMexico City

STL - MEX

STLMEX

Lambert-St Louis

Wed 2/18

3:49 pm-7:45 pm

1 stop27h 56m

Mexico City Benito Juarez

Sun 2/22

8:10 am-1:09 pm

1 stop28h 59m

$367

St. LouisMexico City

STL - MEX

STLMEX

Lambert-St Louis

Tue 1/20

5:42 pm-7:45 pm

1 stop26h 03m

Mexico City Benito Juarez

Tue 1/27

3:45 pm-11:33 pm

2 stops31h 48m

$368

St. LouisMexico City

STL - MEX

STLMEX

Lambert-St Louis

Tue 1/20

5:42 pm-7:45 pm

1 stop26h 03m

Mexico City Benito Juarez

Tue 1/27

3:45 pm-11:33 pm

2 stops31h 48m

$369

St. LouisMexico City

STL - MEX

STLMEX

Lambert-St Louis

Wed 2/18

3:49 pm-7:45 pm

1 stop27h 56m

Mexico City Benito Juarez

Mon 2/23

10:20 pm-10:27 pm

2 stops24h 07m

$375

St. LouisMexico City

STL - MEX

STLMEX

Lambert-St Louis

Wed 2/18

8:17 pm-7:45 pm

2 stops23h 28m

Mexico City Benito Juarez

Wed 2/25

11:10 am-10:27 pm

1 stop11h 17m

$389

St. LouisMexico City

STL - MEX

STLMEX

Lambert-St Louis

Tue 2/17

3:49 pm-7:45 pm

1 stop27h 56m

Mexico City Benito Juarez

Mon 2/23

11:55 am-9:13 pm

1 stop9h 18m

$390

St. LouisMexico City

STL - MEX

STLMEX

Lambert-St Louis

Fri 1/16

7:27 pm-10:30 pm

2 stops27h 03m

Mexico City Benito Juarez

Fri 1/23

8:10 am-2:46 pm

1 stop30h 36m

$394

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 Mexico City from

How to get the cheapest flight ticket from St. Louis to Mexico City

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 Mexico City?

The cheapest month to fly to Mexico City from St. Louis is in September. Flight prices, which tend to average around $541, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of September, then book flights to Mexico City from St. Louis during May instead. Flights to Mexico City in May, while not as cheap as those in September, still average around $564.

What is the cheapest day to depart on your flight to Mexico City?

Our data shows that Tuesday is the least expensive day to fly to Mexico City. Tickets to fly out on this day can be as low as $542. On the other hand, Saturday is the most expensive day to depart from St. Louis because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $669.

What is the cheapest time of day to depart on your flight to Mexico City?

According to our data, the cheapest time of day to fly to Mexico City is at noon. momondo users have found flights departing from St. Louis to Mexico City at noon for as low as $566. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In the afternoon is when there is more demand to fly to Mexico City, so prices are often more expensive at around $621 per ticket.

How far in advance should I book a flight to Mexico City?

You are more likely to see cheaper flights to Mexico City from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Mexico City for around $644 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Mexico City from St. Louis for as low as $496 on momondo.

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

As of December 2025, prices for St. Louis to Mexico City flights are approximately 16% cheaper when compared to flights at the same time last year.

When to book flights from St. Louis to Mexico City

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

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

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

Fastest flight time

7h 08m

Direct flights

None
The fastest flight from St. Louis to Mexico City takes 7h 08m
There are no direct flights from St. Louis to Mexico City. There are no popular flight routes from St. Louis to Mexico City.
Search flight deals

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

    There are 1430.3 mi between Lambert-St Louis and Mexico City Benito Juarez. By plane, this route typically takes 7h 08m.

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

    Prices for flights from Lambert-St Louis Airport to Mexico City Benito Juarez Airport are updated daily.

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

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

  • What documentation or ID do you need to fly to Mexico City Benito Juarez Airport?

    The travel and health documents you'll need for your trip to Mexico City Benito Juarez Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Mexico City Benito Juarez Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

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

Best airlines flying from St. Louis to Mexico City

Compare and see reviews for airlines that fly from St. Louis to Mexico City with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $471Free CancellationRating
5.8
3,082 reviews
Search Frontier flights
AeromexicoPriceFrom $487Free CancellationRating
7.4
1,629 reviews
Search Aeromexico flights
DeltaPriceFrom $487Free CancellationRating
7.9
8,021 reviews
Search Delta flights
American AirlinesPriceFrom $537Free CancellationRating
7.2
11,051 reviews
Search American Airlines flights
United AirlinesPriceFrom $537Free CancellationRating
7.4
9,100 reviews
Search United Airlines flights

Traveling to a place near Mexico City?

Book flights to Mexico City if you plan to visit one of these locations
Cuernavaca
Tepoztlán
Taxco
Valle de Bravo

Why use momondo?

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

Finding the right flight to Mexico City from St. Louis 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 Mexico City quick and easy, saving you time and money.

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

Flights from St. Louis to Mexico City with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once all potential St. Louis to Mexico City flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Yes momondo offers price alerts on flights to Mexico City from St. Louis. 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 Mexico City trip

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Find better results for your trip to Mexico

Airports servicing Mexico City Federal District

Mexico City Toluca Intl Airport