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St. Louis

$210+ 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 3/24. Fares are subject to change and may not be available on all flights or dates of travel.
MEX — STL
Apr 14 — Apr 211
Tue 4/14
Tue 4/21
1 adult, Economy
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1. Tell us where you want to go

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Cheap 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 March 15, 2026.

This Gotogate deal was found by Cheapflights users on 3/14. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/284:10 pm
MEX
-
STL
2 stops41h 16m
Frontier
Tue 5/56:51 pm
STL
-
MEX
1 stop27h 54m
Frontier
Deal found 3/14$349
This Frontier deal was found by Cheapflights users on 3/12. 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 4/168:40 am
MEX
-
STL
1 stop9h 41m
Frontier
Mon 4/203:21 pm
STL
-
MEX
1 stop8h 24m
Frontier
Deal found 3/12$363
This Mytrip deal was found by Cheapflights users on 3/12. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/168:40 am
MEX
-
STL
1 stop9h 41m
Frontier
Thu 4/238:06 pm
STL
-
MEX
2 stops51h 39m
Frontier
Deal found 3/12$381
This Mytrip deal was found by Cheapflights users on 3/13. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/168:40 am
MEX
-
STL
1 stop9h 41m
Frontier
Wed 4/228:23 pm
STL
-
MEX
2 stops24h 22m
Frontier
Deal found 3/13$400

Find 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 March 15, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$349
(Gotogate)

One-way from

$210
(eDestinos)

Popular in

November

Cheapest in

September

Average price

$681
Provider with most accurate pricing for Mexico City Benito Juarez-Lambert-St Louis flight deals.
Search Deals
Provider most trusted by Cheapflights users for Mexico City Benito Juarez-Lambert-St Louis flights.
Search Deals
From Mexico City Benito Juarez to Lambert-St Louis
Search Deals
One-way flight from Mexico City Benito Juarez to Lambert-St Louis
Search Deals
High demand for flights, 0% potential price rise
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

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 March 15, 2026.
Use the filters below to find and compare flights from Mexico City to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

Thu 4/16

8:40 am-7:21 pm

1 stop9h 41m

Lambert-St Louis

Mon 4/20

3:21 pm-10:45 pm

1 stop8h 24m

$363
Quickest round-trip

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

Thu 5/21

8:40 am-7:23 pm

1 stop9h 43m

Lambert-St Louis

Sun 5/24

3:33 pm-10:45 pm

1 stop8h 12m

$460
Cheapest one-way

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

Tue 5/12

8:45 pm-3:15 pm

1 stop17h 30m

$215

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

Thu 4/2

8:45 pm-3:14 pm

1 stop17h 29m

$215

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

Mon 4/13

8:45 pm-3:19 pm

1 stop17h 34m

$215

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

Mon 5/11

8:45 pm-3:15 pm

1 stop17h 30m

$230

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

Fri 5/8

6:20 am-8:55 am

2 stops25h 35m

$246

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

Sun 5/3

8:45 pm-3:19 pm

1 stop17h 34m

$253

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

Thu 5/14

10:45 pm-8:55 am

3 stops33h 10m

$263
Quickest one-way

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

Tue 3/24

10:20 pm-3:11 pm

1 stop15h 51m

$264

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/12

Showing 1-10 of 13 resultsSorted by cheapest first
1
2

Compare providers for flights from Mexico City to St. Louis

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 Mexico City to St. Louis in March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 stars

*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 Mexico City-St. Louis flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Mexico City-St. Louis flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Mexico City-St. Louis flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Mexico City-St. Louis flights, Cheapflights users trust FlightHub the most. FlightHub 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 Mexico City-St. Louis 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 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, January is the cheapest month in which you can book a flight from Mexico City to St. Louis (average of $435). Flying from Mexico City to St. Louis in November is currently the most expensive (average of $653). 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.

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 March 15, 2026.
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
9,428 reviews

Crew

8.1

Overall

7.4

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Food

6.6

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats
United Airlines
7.4
Good
9,428 reviews
United Airlines
7.4
Good
9,428 reviews

Crew

8.1

Overall

7.4

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Food

6.6

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats

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.

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

    Departing from Mexico City to St. Louis will take you 9h 41m. The distance between Mexico City and St. Louis is about 1431 mi.

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

    United Airlines, at $466, was found to be the cheapest airline from Mexico City to St. Louis.. This flight start at 25% 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, January is the cheapest month in which you can book a flight from Mexico City to St. Louis (average of $435). Flying from Mexico City to St. Louis in November is currently the most expensive (average of $653). 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
Fenton
Swansea
Fairview Heights
Maryland Heights
Collinsville
Eureka
Wentzville
Glencoe
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

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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 March 15, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$466Average$577FlexibilityNo cancel feeOn-time69%

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