What are the cheapest airlines flying from St. Louis to Mexico City round-trip?

Frontier, at $471, was found to be the cheapest airline from St. Louis to Mexico City.Alternate airlines to your destination round-trip include Aeromexico and Delta. These flights start at 25% lower than the current average price 3 months from now.

What is the cheapest day to fly from St. Louis to Mexico City?

Travelers seeking maximum savings on their St. Louis to Mexico City flight should consider departing on Tuesday mornings when fares are most often at their lowest. Wednesday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in Mexico City ranges from 0.0 - 4.7 inches per month. July is typically the wettest month, when rainfall can reach 4.7 in. January is typically the driest time to visit Mexico City when rainfall is around 0.0 in.

If weather is an important factor for your trip to Mexico City, use this chart to help with planning. For those seeking warmer temperatures, May is the ideal time of year to visit, when temperatures reach an average of 66.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 55.4 F).

What are the most popular airlines that fly from St. Louis to Mexico City?

Consider American Airlines, Aeromexico or Delta when booking your flight. These represent the most popular airlines when flying from St. Louis to Mexico City.

What is the cheapest day to fly round-trip from St. Louis to Mexico City?

Departing on a Monday is a good option for securing a great price. You can expect to save up to 23% when planning your travel around this day of the week.

How far in advance should I book a flight from St. Louis to Mexico City?

To save on the cost of your flight from St. Louis to Mexico City, book at least 20 days before your planned departure. Booking around this time can save you about 67% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $487 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $854.

What is the cheapest month to fly from St. Louis to Mexico City?

May is one of the best times of the year to fly to Mexico City from St. Louis. Prices for May average $632 per person but you can even find prices for as low as $487. The most expensive prices can be found in the month of December. Opting for a May flight can save you 13% on your journey compared to booking in December

Can I find deals for flights from St. Louis to Mexico City that include hotel bookings?

Yes. In addition to deals on St. Louis to Mexico City flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from St. Louis to Mexico City?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Mexico City.

Can I find deals for business class flights from St. Louis to Mexico City?

Yes. Cheapflights offers flight deals from St. Louis to Mexico City by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$130+ Flights from St. Louis to Mexico City

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1. Tell us where you want to go

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Cheapflights Tip: The best prices from Lambert-St Louis to Mexico City Benito Juarez are usually found in May or January, booked 77 days in advance, depart on a Tuesday or Thursday and return on a Wednesday

Cheap flight deals from St. Louis to Mexico City

Round-trip from	$272 (Kiwi.com)
One-way from	$130 (Kiwi.com)
Popular in	December
Cheapest in	May
Average price	$576

From Lambert-St Louis to Mexico City Benito Juarez

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One-way flight from Lambert-St Louis to Mexico City Benito Juarez

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Highest demand for flights based on searches. 2% potential increase in price ($12 potential increase over avg. RT price).

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Cheapest flight prices on average. 1% potential price decrease ($9 potential savings vs. average RT price).

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Average for round-trip flights in September 2025

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Find flight deals from St. Louis to Mexico City

Cheapest flights from St. Louis to Mexico City
Explore the most affordable flight options available from St. Louis to Mexico City. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

Sun 10/510:39 amSTL - MEX

1 stop13h 16mMultiple Airlines

Sat 10/118:10 amMEX - STL

2 stops24h 12mMultiple Airlines

Deal found 9/11

$272

Mon 10/139:59 pmSTL - MEX

1 stop22h 51mMultiple Airlines

Tue 10/217:00 amMEX - STL

2 stops25h 07mMultiple Airlines

Deal found 9/10

$287

Wed 10/157:52 pmSTL - MEX

1 stop22h 08mMultiple Airlines

Sat 10/253:10 pmMEX - STL

1 stop17h 12mMultiple Airlines

Deal found 9/10

$331

Mon 10/67:55 pmSTL - MEX

1 stop22h 05mMultiple Airlines

Fri 10/178:10 amMEX - STL

1 stop23h 57mMultiple Airlines

Deal found 9/11

$352

Wed 10/17:55 pmSTL - MEX

2 stops24h 55mMultiple Airlines

Sat 10/113:10 pmMEX - STL

1 stop17h 12mMultiple Airlines

Deal found 9/11

$371

Mon 10/67:55 pmSTL - MEX

1 stop22h 05mMultiple Airlines

Mon 10/138:10 amMEX - STL

1 stop23h 57mMultiple Airlines

Deal found 9/10

$373

Sat 10/117:52 pmSTL - MEX

1 stop22h 08mMultiple Airlines

Sat 10/188:10 amMEX - STL

2 stops24h 12mMultiple Airlines

Deal found 9/11

$378

Best flights from St. Louis to Mexico City
Discover carefully curated flight deals from St. Louis to Mexico City that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 11, 2025.

Mon 10/139:59 pmSTL - MEX

1 stop22h 51mMultiple Airlines

Tue 10/218:10 amMEX - STL

1 stop23h 57mMultiple Airlines

Deal found 9/10

$326

Thu 10/1610:17 amSTL - MEX

1 stop13h 38mMultiple Airlines

Sun 10/198:10 amMEX - STL

1 stop23h 57mMultiple Airlines

Deal found 9/10

$371

Sat 10/117:52 pmSTL - MEX

1 stop22h 08mMultiple Airlines

Sat 10/188:10 amMEX - STL

2 stops24h 12mMultiple Airlines

Deal found 9/11

$378

Wed 10/17:55 pmSTL - MEX

1 stop22h 05mMultiple Airlines

Sun 10/58:10 amMEX - STL

1 stop23h 56mMultiple Airlines

Deal found 9/11

$398

Fri 10/107:52 pmSTL - MEX

1 stop22h 08mMultiple Airlines

Mon 10/135:50 amMEX - STL

2 stops9h 45mMultiple Airlines

Deal found 9/10

$413

Fri 10/37:55 pmSTL - MEX

1 stop22h 05mMultiple Airlines

Sun 10/512:40 amMEX - STL

2 stops10h 20mMultiple Airlines

Deal found 9/10

$471

Last-minute flights from St. Louis to Mexico City
Discover last-minute flight deals from St. Louis to Mexico City. Data last updated September 11, 2025 and is based on user searches.

Wed 10/17:55 pmSTL - MEX

2 stops24h 55mMultiple Airlines

Sat 10/113:10 pmMEX - STL

1 stop17h 12mMultiple Airlines

Deal found 9/11

$371

Sun 10/510:39 amSTL - MEX

1 stop13h 16mMultiple Airlines

Sat 10/118:10 amMEX - STL

2 stops24h 12mMultiple Airlines

Deal found 9/11

$272

Mon 10/67:55 pmSTL - MEX

1 stop22h 05mMultiple Airlines

Fri 10/178:10 amMEX - STL

1 stop23h 57mMultiple Airlines

Deal found 9/11

$352

Mon 10/67:55 pmSTL - MEX

1 stop22h 05mMultiple Airlines

Mon 10/138:10 amMEX - STL

1 stop23h 57mMultiple Airlines

Deal found 9/10

$373

Sat 10/117:52 pmSTL - MEX

1 stop22h 08mMultiple Airlines

Sat 10/188:10 amMEX - STL

2 stops24h 12mMultiple Airlines

Deal found 9/11

$378

Mon 10/139:59 pmSTL - MEX

1 stop22h 51mMultiple Airlines

Tue 10/217:00 amMEX - STL

2 stops25h 07mMultiple Airlines

Deal found 9/10

$287

Wed 10/157:52 pmSTL - MEX

1 stop22h 08mMultiple Airlines

Sat 10/253:10 pmMEX - STL

1 stop17h 12mMultiple Airlines

Deal found 9/10

$331

One-way flights from St. Louis to Mexico City
Search for one-way flight options from St. Louis to Mexico City. Find affordable one-way fares based on user searches. Data last updated September 11, 2025.

Sun 10/1210:17 amSTL - MEX

2 stops34h 53mMultiple Airlines

Deal found 9/9

$130

Tue 9/307:55 pmSTL - MEX

2 stops33h 55mMultiple Airlines

Deal found 9/11

$169

Thu 11/207:57 pmSTL - MEX

1 stop21h 08mMultiple Airlines

Deal found 9/11

$201

Fri 10/310:21 amSTL - MEX

1 stop15h 14mMultiple Airlines

Deal found 9/10

$224

Tue 9/239:15 amSTL - MEX

1 stop15h 00mAir Canada

Deal found 9/10

$240

Sun 3/112:20 pmSTL - MEX

2 stops41h 25mMultiple Airlines

Deal found 9/11

$266

Cheapflights Fare Finder

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 10/13

9:59 pm-7:50 pm

1 stop22h 51m

Mexico City Benito Juarez

Tue 10/21

8:10 am-9:07 am

1 stop23h 57m

$326

St. LouisMexico City

STL - MEX

STLMEX

Lambert-St Louis

Thu 10/16

10:17 am-10:55 pm

1 stop13h 38m

Mexico City Benito Juarez

Sun 10/19

8:10 am-9:07 am

1 stop23h 57m

$371

St. LouisMexico City

STL - MEX

STLMEX

Lambert-St Louis

Sat 10/11

7:52 pm-5:00 pm

1 stop22h 08m

Mexico City Benito Juarez

Sat 10/18

8:10 am-9:22 am

2 stops24h 12m

$378

St. LouisMexico City

STL - MEX

STLMEX

Lambert-St Louis

Wed 10/1

7:55 pm-5:00 pm

1 stop22h 05m

Mexico City Benito Juarez

Sun 10/5

8:10 am-9:06 am

1 stop23h 56m

$398

St. LouisMexico City

STL - MEX

STLMEX

Lambert-St Louis

Fri 10/10

7:52 pm-5:00 pm

1 stop22h 08m

Mexico City Benito Juarez

Mon 10/13

5:50 am-4:35 pm

2 stops9h 45m

$413

St. LouisMexico City

STL - MEX

STLMEX

Lambert-St Louis

Fri 10/3

7:55 pm-5:00 pm

1 stop22h 05m

Mexico City Benito Juarez

Sun 10/5

12:40 am-12:00 pm

2 stops10h 20m

$471

St. LouisMexico City

STL - MEX

STLMEX

Lambert-St Louis

Sun 10/12

10:17 am-8:10 pm

2 stops34h 53m

$130

St. LouisMexico City

STL - MEX

STLMEX

Lambert-St Louis

Tue 9/30

7:55 pm-4:50 am

2 stops33h 55m

$169

St. LouisMexico City

STL - MEX

STLMEX

Lambert-St Louis

Thu 11/20

7:57 pm-5:05 pm

1 stop21h 08m

$201

St. LouisMexico City

STL - MEX

STLMEX

Lambert-St Louis

Tue 9/23

9:15 am-11:15 pm

1 stop15h 00m

$240

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

Showing 1-10 of 12 results

Best time to book a flight from St. Louis to Mexico City

Have a flexible travel schedule? Discover the best time to fly to Mexico City from St. Louis with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Mexico City

How far ahead should I book a flight from St. Louis to Mexico City?

The price you pay for your flight from St. Louis to Mexico City may vary depending on when you book. For the best chance of a lower fare, look to book 77 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from St. Louis to Mexico City?

Currently, May is the cheapest month in which you can book a flight from St. Louis to Mexico City (average of $387). Flying from St. Louis to Mexico City in December is currently the most expensive (average of $615). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from STL to MEX?

A simple way to save on the total cost of your ticket is to fly from St. Louis to Mexico City at noon. If you’re flexible enough to do this you can expect to save up to 9% on your trip compared to booking a flight in the afternoon.

Reviews of airlines servicing Mexico City

See what other customers who have flown with Delta, Aeromexico, and United Airlines from St. Louis to Mexico City have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

7,960 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Delta

8.0

Very good

7,960 reviews

Delta

8.0

Very good

7,960 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Aeromexico

7.5

Good

1,701 reviews

Delta

8.0

Very good

7,960 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

United Airlines

7.4

Good

8,937 reviews

Delta

8.0

Very good

7,960 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

American Airlines

7.2

Good

10,000 reviews

Delta

8.0

Very good

7,960 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Frontier

5.8

Fair

3,177 reviews

Delta

8.0

Very good

7,960 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

What are the cheapest airlines flying from St. Louis to Mexico City round-trip?
Frontier, at $471, was found to be the cheapest airline from St. Louis to Mexico City.Alternate airlines to your destination round-trip include Aeromexico and Delta. These flights start at 25% lower than the current average price 3 months from now.
Can I find deals for flights from St. Louis to Mexico City that include hotel bookings?
Yes. In addition to deals on St. Louis to Mexico City flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from St. Louis to Mexico City?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Mexico City.
Can I find deals for business class flights from St. Louis to Mexico City?
Yes. Cheapflights offers flight deals from St. Louis to Mexico City by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from St. Louis to Mexico City?
Currently, May is the cheapest month in which you can book a flight from St. Louis to Mexico City (average of $387). Flying from St. Louis to Mexico City in December is currently the most expensive (average of $615). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for St. Louis to Mexico City

Kansas City to Mexico City flights

Springfield to Mexico City flights

Complete your trip

Mexico City car rentals

Mexico City Benito Juarez Airport car rentals

Mexico City Toluca Intl Airport car rentals

Puebla City Huejotzingo Airport car rentals

La Condesa car rentals

Roma Norte car rentals

Polanco car rentals

Coyoacán car rentals

Benito Juárez car rentals

Iztapalapa car rentals

Tlalpan car rentals

Azcapotzalco car rentals

Other flights to Mexico City

Top 5 airlines flying from St. Louis to Mexico City

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$471	Average$546	FlexibilityNo cancel fee	On-time62%
Aeromexico	Cheapest$487	Average$579	FlexibilityNo cancel fee	On-timeN/A
Delta	Cheapest$487	Average$587	FlexibilityNo cancel fee	On-timeN/A
American Airlines	Cheapest$527	Average$645	FlexibilityNo cancel fee	On-time71%
United Airlines	Cheapest$527	Average$649	FlexibilityNo cancel fee	On-time69%

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$130+ Cheap flights from St. Louis (STL) to Mexico City (MEX)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/12. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from St. Louis to Mexico City with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheapflights Tip: The best prices from Lambert-St Louis to Mexico City Benito Juarez are usually found in May or January, booked 77 days in advance, depart on a Tuesday or Thursday and return on a Wednesday

Cheap flight deals from St. Louis to Mexico City

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from St. Louis to Mexico City

Cheapest flights from St. Louis to Mexico CityExplore the most affordable flight options available from St. Louis to Mexico City. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

Explore the most affordable flight options available from St. Louis to Mexico City. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from St. Louis to Mexico City that are best for you.

Best time to book a flight from St. Louis to Mexico City

Have a flexible travel schedule? Discover the best time to fly to Mexico City from St. Louis with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Mexico City

How far ahead should I book a flight from St. Louis to Mexico City?

What is the cheapest month to book a flight from St. Louis to Mexico City?

What is the cheapest time of day to fly from STL to MEX?

Reviews of airlines servicing Mexico City

See what other customers who have flown with Delta, Aeromexico, and United Airlines from St. Louis to Mexico City have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Mexico City. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What are the cheapest airlines flying from St. Louis to Mexico City round-trip?

Can I find deals for flights from St. Louis to Mexico City that include hotel bookings?

How can I find direct flights from St. Louis to Mexico City?

Can I find deals for business class flights from St. Louis to Mexico City?

What is the cheapest month to book a flight from St. Louis to Mexico City?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for St. Louis to Mexico City

See prices for flight routes from nearby airports that may be better suited for you.

Top 5 airlines flying from St. Louis to Mexico City

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Cheapest flights from St. Louis to Mexico City
Explore the most affordable flight options available from St. Louis to Mexico City. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.