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St. Louis

$211+ 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 10/6. Fares are subject to change and may not be available on all flights or dates of travel.
MEX — STL
oct. 11 — oct. 181
sáb. 10/11
sáb. 10/18
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 septiembre 11, 2025.

Round-trip from

$332
(Kiwi.com)

One-way from

$211
(Kiwi.com)

Popular in

February

Cheapest in

March

Average price

$507
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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High demand for flights, 2% potential price rise
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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 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 septiembre 11, 2025.

This Kiwi.com deal was found by Cheapflights users on 9/9. 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.
sáb. 10/253:10 pmMEX - STL
1 stop17h 12mMultiple Airlines
sáb. 11/14:51 pmSTL - MEX
1 stop28h 14mMultiple Airlines
Deal found 9/9$332
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
sáb. 9/2712:40 amMEX - STL
2 stops10h 20mMultiple Airlines
dom. 10/510:39 amSTL - MEX
1 stop13h 16mMultiple Airlines
Deal found 9/10$364
This Kiwi.com deal was found by Cheapflights users on 9/9. 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.
vie. 10/248:10 amMEX - STL
1 stop23h 57mMultiple Airlines
vie. 10/318:40 pmSTL - MEX
2 stops30h 05mMultiple Airlines
Deal found 9/9$366
This Kiwi.com deal was found by Cheapflights users on 9/9. 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.
vie. 10/248:10 amMEX - STL
1 stop23h 57mMultiple Airlines
jue. 10/306:22 pmSTL - MEX
2 stops26h 58mMultiple Airlines
Deal found 9/9$384
This Air Canada deal was found by Cheapflights users on 9/9. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/912:15 amMEX - STL
1 stop18h 23mAir Canada
dom. 9/149:15 amSTL - MEX
1 stop26h 55mAir Canada
Deal found 9/9$497

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 septiembre 11, 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

sáb. 10/25

3:10 pm-9:22 am

1 stop17h 12m

Lambert-St Louis

sáb. 11/1

4:51 pm-8:05 pm

1 stop28h 14m

$332

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

sáb. 9/27

12:40 am-12:00 pm

2 stops10h 20m

Lambert-St Louis

dom. 10/5

10:39 am-10:55 pm

1 stop13h 16m

$364

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

vie. 10/24

8:10 am-9:07 am

1 stop23h 57m

Lambert-St Louis

vie. 10/31

8:40 pm-1:45 am

2 stops30h 05m

$366

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

vie. 10/24

8:10 am-9:07 am

1 stop23h 57m

Lambert-St Louis

jue. 10/30

6:22 pm-8:20 pm

2 stops26h 58m

$384

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

dom. 9/28

11:05 am-1:02 pm

1 stop24h 57m

Lambert-St Louis

dom. 10/5

7:55 pm-5:00 pm

1 stop22h 05m

$522

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

vie. 10/24

6:55 am-9:28 pm

2 stops13h 33m

Lambert-St Louis

jue. 10/30

6:00 am-10:15 pm

2 stops17h 15m

$522

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

lun. 10/6

8:10 am-9:07 am

1 stop23h 57m

$211

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

vie. 10/24

11:45 am-3:56 pm

1 stop27h 11m

$212

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

mar. 9/16

6:50 pm-9:06 am

2 stops37h 16m

$258

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

lun. 9/15

6:25 am-9:06 am

2 stops25h 41m

$258

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 14 results
1
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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 septiembre 11, 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.

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

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 septiembre 11, 2025.
Peruse reviews from past customers who have flown with 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.
United Airlines
7.4
Good
8,937 reviews

Entertainment

7.1

Food

6.6

Overall

7.4

Comfort

7.3

Crew

8.1

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.
United Airlines
7.4
Good
8,937 reviews
United Airlines
7.4
Good
8,937 reviews

Entertainment

7.1

Food

6.6

Overall

7.4

Comfort

7.3

Crew

8.1

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.

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

    United Airlines, at $491, was found to be the cheapest airline from Mexico City to St. Louis.. This flight start at 18% lower than the current average price 3 months from now.

  • 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
Edwardsville
O'Fallon
Fairview Heights
Maryland Heights
Collinsville
Eureka
Glencoe
St. Peters
Chesterfield
Alton
Farmington
Festus

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Mexico City to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.
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 septiembre 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$491Average$572FlexibilityNo cancel feeOn-time69%

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