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St. Louis

$132+ Cheap flights from Mexico 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 10/31. Fares are subject to change and may not be available on all flights or dates of travel.
MEX — STL
Sep 6 — Sep 131
Sat 9/6
Sat 9/13
1 adult, Economy
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Cheap flight deals from Mexico to St. Louis

Keep the following information in mind while searching for Mexico to St. Louis flight deals. Data was last updated September 1, 2025.

Round-trip from

$205
(Priceline)

One-way from

$132
(Travelocity)

Popular in

February

Cheapest in

March

Average price

$507

Good round-trip deal

$372 or less

Good one-way deal

$225 or less
From Mexico to Lambert-St Louis
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One-way flight from Mexico 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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Price to beat on a round-trip flight from Mexico to Lambert-St Louis.
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Price to beat on a one-way flight from Mexico to Lambert-St Louis.
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Find flight deals from Mexico to St. Louis

Cheapest flights from Mexico to St. Louis
Explore the most affordable flight options available from Mexico to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 1, 2025.

This Priceline deal was found by Cheapflights users on 8/31. 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.
Tue 9/302:49 pmCUN - STL
Nonstop3h 21mFrontier
Tue 10/710:22 amSTL - CUN
Nonstop3h 13mFrontier
Deal found 8/31$205
This Priceline deal was found by Cheapflights users on 9/1. 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.
Thu 9/182:49 pmCUN - STL
Nonstop3h 21mFrontier
Mon 9/2210:21 amSTL - CUN
Nonstop3h 13mFrontier
Deal found 9/1$239
This Priceline deal was found by Cheapflights users on 8/30. 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 9/62:49 pmCUN - STL
Nonstop3h 21mFrontier
Sat 9/1310:21 amSTL - CUN
Nonstop3h 13mFrontier
Deal found 8/30$303
This Kiwi.com deal was found by Cheapflights users on 8/31. 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.
Tue 9/302:49 pmCUN - STL
Nonstop3h 21mMultiple Airlines
Tue 10/710:57 amSTL - CUN
2 stops21h 07mMultiple Airlines
Deal found 8/31$328
This Kiwi.com deal was found by Cheapflights users on 9/1. 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 9/1810:20 amCUN - STL
2 stops22h 46mMultiple Airlines
Mon 9/2210:21 amSTL - CUN
Nonstop3h 13mMultiple Airlines
Deal found 9/1$342
This Kiwi.com deal was found by Cheapflights users on 8/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/149:09 amCUN - STL
3 stops47h 58mMultiple Airlines
Tue 10/2110:22 amSTL - CUN
Nonstop3h 13mMultiple Airlines
Deal found 8/29$387
This Kiwi.com deal was found by Cheapflights users on 9/1. 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.
Sun 10/58:10 amMEX - STL
1 stop23h 56mMultiple Airlines
Sun 10/1910:17 amSTL - MEX
1 stop13h 38mMultiple Airlines
Deal found 9/1$401
This Kiwi.com deal was found by Cheapflights users on 8/30. 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 9/62:07 pmCUN - STL
1 stop19h 33mMultiple Airlines
Sat 9/1310:21 amSTL - CUN
Nonstop3h 13mMultiple Airlines
Deal found 8/30$410
This Kiwi.com deal was found by Cheapflights users on 9/1. 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 9/188:10 amMEX - STL
1 stop23h 56mMultiple Airlines
Mon 9/224:00 pmSTL - MEX
2 stops31h 00mMultiple Airlines
Deal found 9/1$432
This Frontier deal was found by Cheapflights users on 9/1. 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.
Sun 10/53:10 pmMEX - STL
2 stops16h 56mFrontier
Sun 10/1910:17 amSTL - MEX
2 stops20h 03mFrontier
Deal found 9/1$439
This Kiwi.com deal was found by Cheapflights users on 9/1. 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.
Tue 9/2311:04 amBJX - STL
1 stop30h 06mMultiple Airlines
Thu 10/911:32 amSTL - BJX
2 stops34h 43mMultiple Airlines
Deal found 9/1$476
This United Airlines deal was found by Cheapflights users on 8/31. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/262:25 pmCZM - STL
1 stop9h 06mUnited Airlines
Fri 1/23:10 pmSTL - CZM
1 stop23h 09mUnited Airlines
Deal found 8/31$481

Cheapflights Fare Finder

 
Customize your flight search to find flights from Mexico 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 September 1, 2025.
Use the filters below to find and compare flights from Mexico to St. Louis that are best for you.

Fly from

Mexico

Fly to

St. Louis

Route

Depart

Return

Price

CancúnSt. Louis

CUN - STL

CUNSTL

Cancun

Tue 9/30

2:49 pm-6:10 pm

Nonstop3h 21m

Lambert-St Louis

Tue 10/7

10:22 am-1:35 pm

Nonstop3h 13m

$205

CancúnSt. Louis

CUN - STL

CUNSTL

Cancun

Thu 9/18

2:49 pm-6:10 pm

Nonstop3h 21m

Lambert-St Louis

Mon 9/22

10:21 am-1:34 pm

Nonstop3h 13m

$239

CancúnSt. Louis

CUN - STL

CUNSTL

Cancun

Tue 10/14

2:50 pm-6:07 pm

Nonstop3h 17m

Lambert-St Louis

Tue 10/21

10:22 am-1:35 pm

Nonstop3h 13m

$303

CancúnSt. Louis

CUN - STL

CUNSTL

Cancun

Tue 9/30

2:49 pm-6:10 pm

Nonstop3h 21m

Lambert-St Louis

Tue 10/7

10:57 am-8:04 am

2 stops21h 07m

$328

CancúnSt. Louis

CUN - STL

CUNSTL

Cancun

Thu 9/18

10:20 am-9:06 am

2 stops22h 46m

Lambert-St Louis

Mon 9/22

10:21 am-1:34 pm

Nonstop3h 13m

$342

CancúnSt. Louis

CUN - STL

CUNSTL

Cancun

Tue 10/14

9:09 am-9:07 am

3 stops47h 58m

Lambert-St Louis

Tue 10/21

10:22 am-1:35 pm

Nonstop3h 13m

$387

CancúnSt. Louis

CUN - STL

CUNSTL

Cancun

Fri 12/26

11:33 am-1:55 pm

Nonstop3h 22m

Lambert-St Louis

Fri 1/2

6:00 am-10:23 am

Nonstop3h 23m

$387

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

Sun 10/5

8:10 am-9:06 am

1 stop23h 56m

Lambert-St Louis

Sun 10/19

10:17 am-10:55 pm

1 stop13h 38m

$401

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

Thu 9/18

8:10 am-9:06 am

1 stop23h 56m

Lambert-St Louis

Mon 9/22

4:00 pm-10:00 pm

2 stops31h 00m

$432

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

Sun 10/5

3:10 pm-9:06 am

2 stops16h 56m

Lambert-St Louis

Sun 10/19

10:17 am-5:20 am

2 stops20h 03m

$439

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/1

Showing 1-10 of 54 results
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Best time to book a flight from Mexico to St. Louis

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

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

Currently, August is the cheapest month in which you can book a flight from Mexico to St. Louis (average of $311). Flying from Mexico 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 MX to STL?

Find hourly flight availability from Mexico 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 September 1, 2025.

When flying from Mexico to St. Louis, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 September 1, 2025.
See what other customers who have flown with United Airlines from Mexico to St. Louis have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,936 reviews

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Crew

8.1

Overall

7.4

Food

6.6

Reviews

1 / 20
4.0
Okay

Thomas,Apr 2025

TPE - SFO

The boarding experience was okay. The dietary food choices were limited, the midway snacks were hard and dry. The seat was uncomfortable - stiff seat cushion, seat back kept springing back to the upright position, narrow seat width. Love the app and the ability to track my luggage. Flight crew was efficient.
United Airlines
7.4
Good
8,936 reviews
United Airlines
7.4
Good
8,936 reviews

Boarding

7.7

Comfort

7.3

Entertainment

7.1

Crew

8.1

Overall

7.4

Food

6.6

Reviews

1 / 20
4.0
Okay

Thomas,Apr 2025

TPE - SFO

The boarding experience was okay. The dietary food choices were limited, the midway snacks were hard and dry. The seat was uncomfortable - stiff seat cushion, seat back kept springing back to the upright position, narrow seat width. Love the app and the ability to track my luggage. Flight crew was efficient.

Related info for your journey

Find useful and relevant information for your journey from Mexico 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 airport do you fly into for flights to St. Louis from Mexico?

    Located just 12.7 mi from the city center, Lambert-St Louis (STL) is the airport most travelers will use when flying to St. Louis from Mexico.

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

    There are many flights that can get you from Mexico to St. Louis in 3h 21m. Fly via Frontier, United Airlines, or Delta to get the fastest option. Mexico and St. Louis are separated by a distance of 1241 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    One-way options have recently been found by users for as low as $132 on Frontier. Other airlines that offer cheap prices include Delta from $271 and United Airlines from $271 one-way.

  • What are the most popular routes from Mexico to St. Louis?

    The most popular flight routes from Mexico to St. Louis are Mexico City Benito Juarez - Lambert-St Louis, Cozumel - Lambert-St Louis and Cancun - Lambert-St Louis.

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Mexico to St. Louis (average of $311). Flying from Mexico 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
Fairview Heights
Maryland Heights
Collinsville
Eureka
St. Peters
Glencoe
Alton
Chesterfield
Farmington
Festus

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Top airline flying from Mexico to St. Louis

Discover the top airline that operate flights from Mexico 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 September 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$441Average$514FlexibilityNo cancel feeOn-time69%

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