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

Frontier, at $498, was found to be the cheapest airline from St. Louis to Mexico City. An alternate airline flying to your destination would be Aeromexico. These flights start at 20% lower than the current average price 3 months from now.

What are the cheapest airlines to fly from St. Louis to Mexico City one-way?

For one-way options, check prices for Frontier. According to our data, you can fly for as low as $226. Users have also found prices from $268 and $304 on American Airlines and Aeromexico, respectively.

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 8 days before your planned departure. Booking around this time can save you about 64% 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?

September is one of the best times of the year to fly to Mexico City from St. Louis. Prices for September average $628 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 September flight can save you 21% 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.

$161+ Flights from St. Louis to Mexico City

Q: How much does it cost to fly round-trip from St. Louis to Mexico City?

Airfare is below average for this route at the moment. St. Louis to Mexico City flights typically cost between $511 and $633 in September. The cheapest round-trip price found within the last 3 days was $383 on Multiple Airlines (Sep 4-Sep 8).

Home Search by date Vacation packages Hotels Flight deals Car rental Travel tips & news

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

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Lambert-St Louis to Mexico City Benito Juarez are usually found in September or August, 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	$383 (Kiwi.com)
One-way from	$161 (Kiwi.com)
Popular in	December
Cheapest in	September
Average price	$682

From Lambert-St Louis to Mexico City Benito Juarez

Search Deals

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

Search Deals

Highest demand for flights based on searches. 4% potential increase in price ($31 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($13 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in July 2025

Search Deals

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 July 29, 2025.

Thu 9/410:49 amSTL - MEX

1 stop13h 06mMultiple Airlines

Mon 9/88:10 amMEX - STL

1 stop23h 56mMultiple Airlines

Deal found 7/27

$383

Wed 8/2010:26 amSTL - MEX

1 stop13h 54mFrontier

Tue 9/26:45 amMEX - STL

1 stop10h 24mFrontier

Deal found 7/29

$478

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 July 29, 2025.

Thu 9/410:49 amSTL - MEX

1 stop13h 06mMultiple Airlines

Mon 9/88:10 amMEX - STL

1 stop23h 56mMultiple Airlines

Deal found 7/27

$383

Tue 8/126:45 amSTL - MEX

1 stop24h 00mFrontier

Sat 8/1611:05 amMEX - STL

1 stop11h 42mFrontier

Deal found 7/27

$498

Thu 9/117:10 amSTL - MEX

2 stops15h 45mAeromexico

Thu 9/188:40 amMEX - STL

1 stop8h 07mAeromexico

Deal found 7/28

$536

Last-minute flights from St. Louis to Mexico City
Discover last-minute flight deals from St. Louis to Mexico City. Data last updated July 29, 2025 and is based on user searches.

Sun 8/34:00 pmSTL - MEX

1 stop8h 15mAir Canada

Fri 8/812:15 amMEX - STL

1 stop18h 30mAir Canada

Deal found 7/26

$1,263

Mon 8/410:46 amSTL - MEX

2 stops11h 59mDelta

Sat 8/98:25 amMEX - STL

2 stops14h 28mDelta

Deal found 7/26

$836

Wed 8/611:24 amSTL - MEX

1 stop9h 11mMultiple Airlines

Fri 8/158:10 amMEX - STL

1 stop24h 01mMultiple Airlines

Deal found 7/27

$448

Wed 8/67:29 pmSTL - MEX

1 stop23h 01mFrontier

Fri 8/153:45 pmMEX - STL

2 stops16h 26mFrontier

Deal found 7/27

$538

Wed 8/66:00 amSTL - MEX

2 stops8h 55mAeromexico

Thu 8/147:00 amMEX - STL

2 stops13h 27mAeromexico

Deal found 7/28

$802

Wed 8/67:01 amSTL - MEX

1 stop6h 09mAmerican Airlines

Mon 8/115:35 amMEX - STL

1 stop17h 24mAmerican Airlines

Deal found 7/26

$806

Wed 8/207:54 pmSTL - MEX

1 stop22h 36mMultiple Airlines

Sat 8/303:10 pmMEX - STL

1 stop17h 08mMultiple Airlines

Deal found 7/27

$439

Wed 8/2010:26 amSTL - MEX

1 stop13h 54mFrontier

Tue 9/26:45 amMEX - STL

1 stop10h 24mFrontier

Deal found 7/29

$478

Thu 8/216:00 amSTL - MEX

2 stops9h 55mDelta

Mon 9/112:50 pmMEX - STL

2 stops10h 48mDelta

Deal found 7/28

$615

Tue 8/267:00 amSTL - MEX

2 stops17h 55mAeromexico

Tue 9/27:00 amMEX - STL

2 stops14h 02mAeromexico

Deal found 7/29

$541

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 July 29, 2025.

Tue 8/125:40 pmSTL - MEX

2 stops27h 30mMultiple Airlines

Deal found 7/27

$161

Tue 9/2310:21 amSTL - MEX

1 stop13h 59mFrontier

Deal found 7/29

$226

Tue 9/305:18 amSTL - MEX

2 stops10h 12mAmerican Airlines

Deal found 7/28

$268

Tue 9/236:01 amSTL - MEX

2 stops11h 19mAeromexico

Deal found 7/29

$304

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

Thu 9/4

10:49 am-10:55 pm

1 stop13h 06m

Mexico City Benito Juarez

Mon 9/8

8:10 am-9:06 am

1 stop23h 56m

$383

St. LouisMexico City

STL - MEX

STLMEX

Lambert-St Louis

Tue 8/12

6:45 am-5:45 am

1 stop24h 00m

Mexico City Benito Juarez

Sat 8/16

11:05 am-11:47 pm

1 stop11h 42m

$498

St. LouisMexico City

STL - MEX

STLMEX

Lambert-St Louis

Thu 9/11

7:10 am-9:55 pm

2 stops15h 45m

Mexico City Benito Juarez

Thu 9/18

8:40 am-5:47 pm

1 stop8h 07m

$536

St. LouisMexico City

STL - MEX

STLMEX

Lambert-St Louis

Tue 8/12

5:40 pm-8:10 pm

2 stops27h 30m

$161

St. LouisMexico City

STL - MEX

STLMEX

Lambert-St Louis

Tue 9/23

10:21 am-11:20 pm

1 stop13h 59m

$226

St. LouisMexico City

STL - MEX

STLMEX

Lambert-St Louis

Tue 9/30

5:18 am-2:30 pm

2 stops10h 12m

$268

St. LouisMexico City

STL - MEX

STLMEX

Lambert-St Louis

Tue 9/23

6:01 am-4:20 pm

2 stops11h 19m

$304

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/27

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 $388). 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.

How much does it cost to fly round-trip from St. Louis to Mexico City?

Reviews of airlines servicing Mexico City

See what other customers who have flown with Aeromexico, American Airlines, and Frontier 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.

Aeromexico

7.5

Good

1,720 reviews

Reviews

1 / 20

6.0

Good

Anonymous,Jun 2025

VER - MEX

Was West jet. Very unconrtsble seats. If they can put more seats probably they will.

Aeromexico

7.5

Good

1,720 reviews

Aeromexico

7.5

Good

1,720 reviews

Reviews

1 / 20

6.0

Good

Anonymous,Jun 2025

VER - MEX

Was West jet. Very unconrtsble seats. If they can put more seats probably they will.

American Airlines

7.2

Good

10,000 reviews

Aeromexico

7.5

Good

1,720 reviews

Reviews

1 / 20

6.0

Good

Anonymous,Jun 2025

VER - MEX

Was West jet. Very unconrtsble seats. If they can put more seats probably they will.

Frontier

5.9

Fair

3,238 reviews

Aeromexico

7.5

Good

1,720 reviews

Reviews

1 / 20

6.0

Good

Anonymous,Jun 2025

VER - MEX

Was West jet. Very unconrtsble seats. If they can put more seats probably they will.

Related info for your journey

What are the cheapest airlines flying from St. Louis to Mexico City round-trip?
Frontier, at $498, was found to be the cheapest airline from St. Louis to Mexico City. An alternate airline flying to your destination would be Aeromexico. These flights start at 20% lower than the current average price 3 months from now.
What are the cheapest airlines to fly from St. Louis to Mexico City one-way?
For one-way options, check prices for Frontier. According to our data, you can fly for as low as $226. Users have also found prices from $268 and $304 on American Airlines and Aeromexico, respectively.
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 $388). 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

Polanco car rentals

Roma Norte 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$537	FlexibilityNo cancel fee	On-timeN/A
Delta	Cheapest$487	Average$597	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$525	Average$647	FlexibilityNo cancel fee	On-time69%
American Airlines	Cheapest$527	Average$668	FlexibilityNo cancel fee	On-time71%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

$161+ 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 8/12. 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 September or August, 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 July 29, 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 July 29, 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?

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Mexico City. Price data was last updated on July 25, 2025.

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?

Find hourly flight availability from St. Louis to Mexico City. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 29, 2025.

How much does it cost to fly round-trip from St. Louis to Mexico City?

Reviews of airlines servicing Mexico City

See what other customers who have flown with Aeromexico, American Airlines, and Frontier 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?

What are the cheapest airlines to fly from St. Louis to Mexico City one-way?

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

100% Free

Book with Flexibility

Travel Smart

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 July 29, 2025.