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St. Louis

$243+ Cheap flights from Mexico City (MEX) to St. Louis (STL)

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 8/29. Fares are subject to change and may not be available on all flights or dates of travel.
MEX — STL
ago. 4 — ago. 111
lun. 8/4
lun. 8/11
1 adult, Economy
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Cheap flight deals from Mexico City to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Mexico City (MEX) to St. Louis (STL). 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 julio 30, 2025.

Round-trip from

$371
(Kiwi.com)

One-way from

$243
(Kiwi.com)

Popular in

July

Cheapest in

March

Average price

$756
From Mexico City Benito Juarez to Lambert-St Louis
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One-way flight from Mexico City Benito Juarez to Lambert-St Louis
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Highest demand for flights based on searches. 6% potential increase in price ($44 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($14 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find flight deals from Mexico City to St. Louis

Cheapest flights from Mexico City to St. Louis
Explore the most affordable flight options available from Mexico City to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on julio 30, 2025.

This Kiwi.com deal was found by Cheapflights users on 7/28. 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.
mar. 9/238:10 amMEX - STL
1 stop23h 56mMultiple Airlines
jue. 9/2510:49 amSTL - MEX
1 stop13h 06mMultiple Airlines
Deal found 7/28$371
This SmartFares deal was found by Cheapflights users on 7/28. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/235:45 pmMEX - STL
1 stop23h 25mFrontier
mié. 10/110:21 amSTL - MEX
1 stop13h 59mFrontier
Deal found 7/28$476
This Delta deal was found by Cheapflights users on 7/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/91:10 pmMEX - STL
1 stop9h 31mDelta
jue. 10/239:10 amSTL - MEX
2 stops13h 40mDelta
Deal found 7/28$500
This Trip.com deal was found by Cheapflights users on 7/29. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/119:35 amMEX - STL
1 stop8h 23mUnited Airlines
mié. 9/176:15 amSTL - MEX
1 stop5h 30mUnited Airlines
Deal found 7/29$507

Cheapflights Fare Finder

 
Customize your flight search to find flights from Mexico City to St. Louis 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 julio 30, 2025.
Use the filters below to find and compare flights from Mexico City to St. Louis that are best for you.

Fly from

Mexico City

Fly to

St. Louis

Route

Depart

Return

Price

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

mar. 9/23

8:10 am-9:06 am

1 stop23h 56m

Lambert-St Louis

jue. 9/25

10:49 am-10:55 pm

1 stop13h 06m

$371

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

mar. 9/23

5:45 pm-6:10 pm

1 stop23h 25m

Lambert-St Louis

mié. 10/1

10:21 am-11:20 pm

1 stop13h 59m

$476

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

jue. 10/9

1:10 pm-11:41 pm

1 stop9h 31m

Lambert-St Louis

jue. 10/23

9:10 am-9:50 pm

2 stops13h 40m

$500

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

jue. 9/11

9:35 am-6:58 pm

1 stop8h 23m

Lambert-St Louis

mié. 9/17

6:15 am-10:45 am

1 stop5h 30m

$507

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

vie. 8/29

8:10 am-9:11 am

1 stop24h 01m

$243

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

sáb. 8/23

6:45 am-6:09 pm

1 stop10h 24m

$267

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

vie. 8/15

12:05 am-4:06 pm

2 stops15h 01m

$451

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

lun. 8/11

8:40 am-11:14 pm

1 stop13h 34m

$456

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

sáb. 8/16

4:40 am-10:45 pm

2 stops17h 05m

$578

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

lun. 9/8

12:15 am-3:44 pm

2 stops14h 29m

$598

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

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

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Mexico City 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 Mexico City to St. Louis

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

Currently, August is the cheapest month in which you can book a flight from Mexico City to St. Louis (average of $311). Flying from Mexico City to St. Louis in March is currently the most expensive (average of $356). 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 MEX to STL?

Find hourly flight availability from Mexico City to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated julio 30, 2025.

When flying from Mexico City to St. Louis, the time of day you fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 34% versus a flight in the afternoon.

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. 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 St. Louis. Reviews last updated julio 30, 2025.
Peruse reviews from past customers who have flown with Delta, Aeromexico, and United Airlines from Mexico City to St. Louis to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Crew

8.5

Comfort

7.9

Overall

8.0

Food

7.3

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Delta
8.0
Very good
7,980 reviews
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Crew

8.5

Comfort

7.9

Overall

8.0

Food

7.3

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Aeromexico
7.5
Good
1,721 reviews
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Crew

8.5

Comfort

7.9

Overall

8.0

Food

7.3

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
United Airlines
7.4
Good
8,896 reviews
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Crew

8.5

Comfort

7.9

Overall

8.0

Food

7.3

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Air Canada
7.1
Good
9,837 reviews
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Crew

8.5

Comfort

7.9

Overall

8.0

Food

7.3

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Volaris
6.6
Okay
1,164 reviews
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Crew

8.5

Comfort

7.9

Overall

8.0

Food

7.3

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.

Related info for your journey

Find useful and relevant information for your journey from Mexico City to St. Louis. 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 Mexico City to St. Louis round-trip?

    Frontier, at $476, was found to be the cheapest airline from Mexico City to St. Louis.Alternate airlines to your destination round-trip include Delta and United Airlines. These flights start at 21% lower than the current average price 3 months from now.

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

    One-way options have recently been found by users for as low as $267 on Frontier. Other airlines that offer cheap prices include Delta from $456 and Aeromexico from $470 one-way.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Mexico City to St. Louis 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 Mexico City to St. Louis?

    Currently, August is the cheapest month in which you can book a flight from Mexico City to St. Louis (average of $311). Flying from Mexico City to St. Louis in March is currently the most expensive (average of $356). 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

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
O'Fallon
Maryland Heights
Fairview Heights
Collinsville
Eureka
St. Peters
Glencoe
Alton
Chesterfield
Festus
Farmington

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Alternative routes for Mexico City to St. Louis

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Mexico City to Kansas City flights

Top airline flying from Mexico City to St. Louis

Discover the top airline that operate flights from Mexico City to St. Louis. 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 julio 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$491Average$571FlexibilityNo cancel feeOn-time69%

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