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$187+ 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 12/12. Fares are subject to change and may not be available on all flights or dates of travel.
STL — MEX
Nov 27 — Dec 41
Thu 11/27
Thu 12/4
1 adult, Economy
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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 September or May, booked 19 days in advance, depart on a Tuesday or Thursday and return on a Wednesday

Cheap flight deals from St. Louis to Mexico City

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Mexico City (MEX). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated October 28, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$407
(Kiwi.com)

One-way from

$187
(Kiwi.com)

Popular in

December

Cheapest in

September

Average price

$679
Provider with most accurate pricing for Lambert-St Louis-Mexico City Benito Juarez flight deals.
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Provider most trusted by Cheapflights users for Lambert-St Louis-Mexico City Benito Juarez flights.
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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. 8% potential increase in price ($56 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($18 potential savings vs. average RT price).
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Average for round-trip flights in October 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 October 28, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/67:43 pmSTL - MEX
1 stop21h 22mMultiple Airlines
Fri 12/1212:40 amMEX - STL
2 stops33h 07mMultiple Airlines
Deal found 10/27$407
This Kiwi.com deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/136:22 pmSTL - MEX
2 stops22h 43mMultiple Airlines
Tue 11/188:10 amMEX - STL
1 stop24h 57mMultiple Airlines
Deal found 10/26$413
This Frontier deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/510:42 amSTL - MEX
2 stops11h 03mFrontier
Thu 12/113:45 pmMEX - STL
2 stops19h 37mFrontier
Deal found 10/27$415
This Frontier deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/36:00 amSTL - MEX
1 stop11h 15mFrontier
Thu 12/113:45 pmMEX - STL
2 stops19h 37mFrontier
Deal found 10/27$442
This Kiwi.com deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/107:43 pmSTL - MEX
1 stop21h 22mMultiple Airlines
Wed 12/176:20 amMEX - STL
2 stops28h 36mMultiple Airlines
Deal found 10/26$468
This Priceline deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/67:43 pmSTL - MEX
1 stop21h 22mFrontier
Sat 12/136:10 pmMEX - STL
1 stop19h 40mFrontier
Deal found 10/27$473
This Frontier deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/510:42 amSTL - MEX
2 stops11h 03mFrontier
Sun 1/1111:10 amMEX - STL
1 stop11h 23mFrontier
Deal found 10/27$482
This Frontier deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/46:00 amSTL - MEX
1 stop11h 15mFrontier
Thu 12/113:45 pmMEX - STL
2 stops19h 37mFrontier
Deal found 10/27$492

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated October 28, 2025.
Use the filters below to find and compare flights from St. Louis to Mexico City that are best for you.

Fly from

St. Louis

Fly to

Mexico City

Route

Depart

Return

Price

St. LouisMexico City

STL - MEX

STLMEX

Lambert-St Louis

Thu 11/13

6:22 pm-5:05 pm

2 stops22h 43m

Mexico City Benito Juarez

Tue 11/18

8:10 am-9:07 am

1 stop24h 57m

$413

St. LouisMexico City

STL - MEX

STLMEX

Lambert-St Louis

Sat 12/6

7:43 pm-5:05 pm

1 stop21h 22m

Mexico City Benito Juarez

Sat 12/13

6:10 pm-1:50 pm

1 stop19h 40m

$473

St. LouisMexico City

STL - MEX

STLMEX

Lambert-St Louis

Fri 12/5

10:42 am-9:45 pm

2 stops11h 03m

Mexico City Benito Juarez

Sun 1/11

11:10 am-10:33 pm

1 stop11h 23m

$482

St. LouisMexico City

STL - MEX

STLMEX

Lambert-St Louis

Sun 1/18

6:05 am-5:10 pm

1 stop11h 05m

Mexico City Benito Juarez

Wed 1/28

11:10 am-10:33 pm

1 stop11h 23m

$513

St. LouisMexico City

STL - MEX

STLMEX

Lambert-St Louis

Wed 12/10

7:43 pm-5:05 pm

1 stop21h 22m

Mexico City Benito Juarez

Wed 12/17

11:10 am-10:33 pm

1 stop11h 23m

$517

St. LouisMexico City

STL - MEX

STLMEX

Lambert-St Louis

Sun 1/18

4:05 pm-12:30 pm

1 stop20h 25m

Mexico City Benito Juarez

Tue 1/27

1:05 am-3:29 pm

1 stop14h 24m

$528

St. LouisMexico City

STL - MEX

STLMEX

Lambert-St Louis

Thu 12/4

6:00 am-5:15 pm

1 stop11h 15m

Mexico City Benito Juarez

Sun 1/11

11:10 am-10:33 pm

1 stop11h 23m

$559

St. LouisMexico City

STL - MEX

STLMEX

Lambert-St Louis

Mon 11/24

9:54 pm-5:05 pm

2 stops19h 11m

Mexico City Benito Juarez

Mon 12/1

7:00 am-6:18 pm

1 stop11h 18m

$576

St. LouisMexico City

STL - MEX

STLMEX

Lambert-St Louis

Tue 12/2

4:05 pm-12:50 am

1 stop8h 45m

Mexico City Benito Juarez

Thu 12/11

1:30 pm-3:29 pm

1 stop25h 59m

$579

St. LouisMexico City

STL - MEX

STLMEX

Lambert-St Louis

Mon 12/1

6:00 am-10:10 pm

2 stops16h 10m

Mexico City Benito Juarez

Thu 12/11

7:00 am-11:42 pm

2 stops16h 42m

$583

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/26

Showing 1-10 of 20 results
1
2

Compare providers for flights from St. Louis to Mexico City

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Mexico City in October.
ProviderPrice AccuracyTrust Score*
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
AranGrantPrice Accuracy2 starsTrust Score*3 stars
CheapOairPrice Accuracy3 starsTrust Score*3 stars
SmartFaresPrice Accuracy1 starTrust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on St. Louis-Mexico City flights, users find the pricing of CheapOair to be most consistent on Cheapflights vs. CheapOair Users can find the same prices on St. Louis-Mexico City flight deals on Cheapflights vs. CheapOair >95% of the time. Price accuracy is based on data collected from St. Louis-Mexico City flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on St. Louis-Mexico City flights, Cheapflights users trust CheapOair the most. CheapOair has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Mexico City flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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?

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 October 24, 2025.

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 19 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, January is the cheapest month in which you can book a flight from St. Louis to Mexico City (average of $471). Flying from St. Louis to Mexico City in December is currently the most expensive (average of $555). 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?

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 October 28, 2025.

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 8% 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

Get insights into the airlines that provide service to Mexico City. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Mexico City. Reviews last updated October 28, 2025.
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
7.9
Good
7,993 reviews

Boarding

8.2

Entertainment

7.9

Crew

8.5

Comfort

7.9

Overall

7.9

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Delta
7.9
Good
7,993 reviews
Delta
7.9
Good
7,993 reviews

Boarding

8.2

Entertainment

7.9

Crew

8.5

Comfort

7.9

Overall

7.9

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Aeromexico
7.5
Good
1,678 reviews
Delta
7.9
Good
7,993 reviews

Boarding

8.2

Entertainment

7.9

Crew

8.5

Comfort

7.9

Overall

7.9

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
United Airlines
7.4
Good
8,996 reviews
Delta
7.9
Good
7,993 reviews

Boarding

8.2

Entertainment

7.9

Crew

8.5

Comfort

7.9

Overall

7.9

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
American Airlines
7.2
Good
11,034 reviews
Delta
7.9
Good
7,993 reviews

Boarding

8.2

Entertainment

7.9

Crew

8.5

Comfort

7.9

Overall

7.9

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Frontier
5.8
Fair
3,122 reviews
Delta
7.9
Good
7,993 reviews

Boarding

8.2

Entertainment

7.9

Crew

8.5

Comfort

7.9

Overall

7.9

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.

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.

  • How long is the flight from St. Louis to Mexico City?

    For as low as $473, Frontier can have you in Mexico City from St. Louis in 21h 22m. The distance from St. Louis to Mexico City is about 1431 mi.

  • 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 27% 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, January is the cheapest month in which you can book a flight from St. Louis to Mexico City (average of $471). Flying from St. Louis to Mexico City in December is currently the most expensive (average of $555). 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

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Alternative routes for St. Louis to Mexico City

See prices for flight routes from nearby airports that may be better suited for you.
Kansas City to Mexico City flights
Springfield to Mexico City flights

Top 5 airlines flying from St. Louis to Mexico City

Discover the top 5 airlines that operate flights from St. Louis to Mexico City. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$471Average$489FlexibilityNo cancel feeOn-time62%
AeromexicoCheapest$487Average$579FlexibilityNo cancel feeOn-timeN/A
DeltaCheapest$487Average$587FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$527Average$655FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$527Average$647FlexibilityNo cancel feeOn-time69%

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