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Cheap flights from St. Louis to Mexico City from $129

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 11/2. 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 St. Louis to Mexico City

Cheap round-trip flights

Multiple Airlines Logo
9:59 pm - 7:50 pmSTL-MEX
22h 51m1 stop
Multiple Airlines Logo
7:20 am - 9:22 amMEX-STL
25h 02m2 stops
$317Multiple Airlines
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Mon, Oct 20 - Sat, Oct 25
Multiple Airlines Logo
7:52 pm - 5:00 pmSTL-MEX
22h 08m1 stop
Multiple Airlines Logo
8:10 am - 9:07 amMEX-STL
23h 57m1 stop
$357Multiple Airlines
Find Deal
Wed, Oct 15 - Mon, Oct 20
Multiple Airlines Logo
10:39 am - 10:55 pmSTL-MEX
13h 16m1 stop
Multiple Airlines Logo
8:10 am - 9:07 amMEX-STL
23h 57m1 stop
$359Multiple Airlines
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Sun, Oct 5 - Sun, Oct 12
Frontier Logo
4:56 pm - 10:45 amSTL-MEX
17h 49m2 stops
Frontier Logo
3:45 pm - 9:07 amMEX-STL
17h 22m2 stops
$452Frontier
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Fri, Nov 7 - Mon, Nov 10
Frontier Logo
11:32 am - 10:00 pmSTL-MEX
11h 28m2 stops
Frontier Logo
3:10 pm - 9:07 amMEX-STL
16h 57m2 stops
$481Frontier
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Fri, Oct 17 - Tue, Oct 21
Aeromexico Logo
3:35 pm - 9:50 pmSTL-MEX
6h 15m1 stop
Aeromexico Logo
9:00 pm - 3:01 pmMEX-STL
18h 01m2 stops
$537Aeromexico
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Tue, Dec 30 - Wed, Jan 21
Delta Logo
6:30 am - 1:45 pmSTL-MEX
7h 15m1 stop
Delta Logo
1:30 pm - 12:37 amMEX-STL
11h 07m2 stops
$542Delta
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Thu, Jan 22 - Mon, Jan 26
Delta Logo
11:40 am - 9:25 pmSTL-MEX
9h 45m2 stops
Delta Logo
7:05 am - 2:30 pmMEX-STL
7h 25m1 stop
$547Delta
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Wed, Dec 10 - Tue, Dec 23
Aeromexico Logo
6:40 am - 10:05 pmSTL-MEX
16h 25m2 stops
Aeromexico Logo
10:30 pm - 4:07 pmMEX-STL
17h 37m2 stops
$557Aeromexico
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Fri, Oct 31 - Mon, Nov 10
United Airlines Logo
1:35 pm - 10:30 pmSTL-MEX
8h 55m1 stop
United Airlines Logo
3:20 pm - 9:55 pmMEX-STL
6h 35m1 stop
$560United Airlines
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Wed, Dec 10 - Tue, Dec 23

Aeromexico flights from St. Louis to Mexico City

Our best Aeromexico deals on St. Louis to Mexico City flight tickets
Aeromexico
Dec 30
STL3:35 pmLambert-St Louis
6h 15m
1 stop
MEX9:50 pmMexico City Benito Juarez
Jan 21
MEX9:00 pmMexico City Benito Juarez
18h 01m
2 stops
STL3:01 pmLambert-St Louis
$537
Find similar
Aeromexico
Oct 31
STL6:40 amLambert-St Louis
16h 25m
2 stops
MEX10:05 pmMexico City Benito Juarez
Nov 10
MEX10:30 pmMexico City Benito Juarez
17h 37m
2 stops
STL4:07 pmLambert-St Louis
$557
Find similar
Aeromexico
Sep 26
STL6:01 amLambert-St Louis
10h 19m
2 stops
MEX3:20 pmMexico City Benito Juarez
Sep 29
MEX6:01 amMexico City Benito Juarez
13h 33m
2 stops
STL8:34 pmLambert-St Louis
$822
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Delta flights from St. Louis to Mexico City

Our best Delta deals on St. Louis to Mexico City flight tickets
Delta
Jan 22
STL6:30 amLambert-St Louis
7h 15m
1 stop
MEX1:45 pmMexico City Benito Juarez
Jan 26
MEX1:30 pmMexico City Benito Juarez
11h 07m
2 stops
STL12:37 amLambert-St Louis
$542
Find similar
Delta
Dec 10
STL11:40 amLambert-St Louis
9h 45m
2 stops
MEX9:25 pmMexico City Benito Juarez
Dec 23
MEX7:05 amMexico City Benito Juarez
7h 25m
1 stop
STL2:30 pmLambert-St Louis
$547
Find similar
Delta
Sep 30
STL6:01 amLambert-St Louis
13h 09m
2 stops
MEX6:10 pmMexico City Benito Juarez
Oct 13
MEX1:00 pmMexico City Benito Juarez
10h 24m
2 stops
STL12:24 amLambert-St Louis
$692
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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 September 16, 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

Mon 10/20

9:59 pm-7:50 pm

1 stop22h 51m

Mexico City Benito Juarez

Sat 10/25

7:20 am-9:22 am

2 stops25h 02m

$317

St. LouisMexico City

STL - MEX

STLMEX

Lambert-St Louis

Wed 10/15

7:52 pm-5:00 pm

1 stop22h 08m

Mexico City Benito Juarez

Mon 10/20

8:10 am-9:07 am

1 stop23h 57m

$357

St. LouisMexico City

STL - MEX

STLMEX

Lambert-St Louis

Sun 10/5

10:39 am-10:55 pm

1 stop13h 16m

Mexico City Benito Juarez

Sun 10/12

8:10 am-9:07 am

1 stop23h 57m

$359

St. LouisMexico City

STL - MEX

STLMEX

Lambert-St Louis

Fri 11/7

4:56 pm-10:45 am

2 stops17h 49m

Mexico City Benito Juarez

Mon 11/10

3:45 pm-9:07 am

2 stops17h 22m

$452

St. LouisMexico City

STL - MEX

STLMEX

Lambert-St Louis

Fri 10/17

11:32 am-10:00 pm

2 stops11h 28m

Mexico City Benito Juarez

Tue 10/21

3:10 pm-9:07 am

2 stops16h 57m

$481

St. LouisMexico City

STL - MEX

STLMEX

Lambert-St Louis

Tue 12/30

3:35 pm-9:50 pm

1 stop6h 15m

Mexico City Benito Juarez

Wed 1/21

9:00 pm-3:01 pm

2 stops18h 01m

$537

St. LouisMexico City

STL - MEX

STLMEX

Lambert-St Louis

Thu 1/22

6:30 am-1:45 pm

1 stop7h 15m

Mexico City Benito Juarez

Mon 1/26

1:30 pm-12:37 am

2 stops11h 07m

$542

St. LouisMexico City

STL - MEX

STLMEX

Lambert-St Louis

Wed 12/10

11:40 am-9:25 pm

2 stops9h 45m

Mexico City Benito Juarez

Tue 12/23

7:05 am-2:30 pm

1 stop7h 25m

$547

St. LouisMexico City

STL - MEX

STLMEX

Lambert-St Louis

Fri 10/31

6:40 am-10:05 pm

2 stops16h 25m

Mexico City Benito Juarez

Mon 11/10

10:30 pm-4:07 pm

2 stops17h 37m

$557

St. LouisMexico City

STL - MEX

STLMEX

Lambert-St Louis

Wed 12/10

1:35 pm-10:30 pm

1 stop8h 55m

Mexico City Benito Juarez

Tue 12/23

3:20 pm-9:55 pm

1 stop6h 35m

$560

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 $562, 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 $634 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 September 2025, prices for St. Louis to Mexico City flights are approximately 15% more expensive 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

Direct flights

None
There are no direct flights from St. Louis to Mexico City. There are no popular flight routes from St. Louis to Mexico City.
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  • 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 6h 15m.

  • 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
3,174 reviews
Search Frontier flights
AeromexicoPriceFrom $487Free CancellationRating
7.4
1,696 reviews
Search Aeromexico flights
DeltaPriceFrom $487Free CancellationRating
7.9
7,957 reviews
Search Delta flights
American AirlinesPriceFrom $527Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $527Free CancellationRating
7.4
8,924 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.

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Find better results for your trip to Mexico

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