What are the cheapest airlines flying from Mexico City to St. Louis round-trip?

Frontier, at $443, 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 24% 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 $252 on Frontier. Other airlines that offer cheap prices include Air Canada from $327 and Delta from $356 one-way.

What is the cheapest day to fly from Mexico City to St. Louis?

Travelers seeking maximum savings on their Mexico City to St. Louis flight should consider departing on Thursday mornings when fares are most often at their lowest. Saturday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

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

Friday flights are generally found to be more expensive for flights from Mexico City to St. Louis. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to St. Louis.

What is the cheapest month to fly from Mexico City to St. Louis?

Due to multiple factors, expect to potentially pay more when booking in February. For low rates, March can be a great choice for travel to St. Louis. Flights to St. Louis from Mexico City in March are about $584 on average during March, but can be found for as low as $449.

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.

$247+ Flights from Mexico City to St. Louis

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Cheap flight deals from Mexico City to St. Louis

Round-trip from	$443 (SmartFares)
One-way from	$247 (Kiwi.com)
Popular in	February
Cheapest in	March
Average price	$642

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

Highest demand for flights based on searches. 1% potential increase in price ($5 potential increase over avg. RT price).

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Cheapest flight prices on average. 1% potential price decrease ($11 potential savings vs. average RT price).

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Average for round-trip flights in June 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 June 12, 2025.

Tue 8/198:10 amMEX - STL

1 stop24h 01mFrontier

Sun 8/2410:17 amSTL - MEX

1 stop13h 38mFrontier

Deal found 6/11

$443

Wed 8/611:05 amMEX - STL

1 stop11h 42mMultiple Airlines

Sun 8/179:15 amSTL - MEX

1 stop26h 55mMultiple Airlines

Deal found 6/11

$483

Thu 10/93:05 pmMEX - STL

1 stop8h 32mDelta

Thu 10/239:00 amSTL - MEX

2 stops12h 55mDelta

Deal found 6/9

$500

Tue 8/194:40 amMEX - STL

2 stops8h 53mUnited Airlines

Sun 8/243:20 pmSTL - MEX

2 stops18h 15mUnited Airlines

Deal found 6/11

$504

Mon 6/1612:10 pmMEX - STL

1 stop23h 26mAir Canada

Fri 6/202:30 pmSTL - MEX

1 stop9h 45mAir Canada

Deal found 6/9

$541

Mon 8/187:35 amMEX - STL

2 stops11h 58mAeromexico

Sun 8/246:00 amSTL - MEX

2 stops12h 20mAeromexico

Deal found 6/11

$576

Mon 8/181:55 amMEX - STL

2 stops20h 29mWestJet

Mon 8/256:00 amSTL - MEX

2 stops19h 58mWestJet

Deal found 6/11

$1,432

Best flights from Mexico City to St. Louis
Discover carefully curated flight deals from Mexico City to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 12, 2025.

Tue 8/198:10 amMEX - STL

1 stop24h 01mFrontier

Sun 8/2410:17 amSTL - MEX

1 stop13h 38mFrontier

Deal found 6/11

$443

Wed 8/611:05 amMEX - STL

1 stop11h 42mMultiple Airlines

Sun 8/179:15 amSTL - MEX

1 stop26h 55mMultiple Airlines

Deal found 6/12

$483

Thu 10/98:45 amMEX - STL

2 stops13h 17mDelta

Thu 10/237:20 amSTL - MEX

2 stops9h 10mDelta

Deal found 6/9

$500

Tue 8/199:35 amMEX - STL

2 stops10h 11mUnited Airlines

Mon 8/256:35 amSTL - MEX

2 stops12h 15mUnited Airlines

Deal found 6/11

$504

Mon 8/1812:15 amMEX - STL

1 stop18h 30mAir Canada

Sun 8/249:15 amSTL - MEX

1 stop26h 55mAir Canada

Deal found 6/11

$563

Mon 8/187:35 amMEX - STL

2 stops11h 58mAeromexico

Sun 8/246:00 amSTL - MEX

2 stops12h 20mAeromexico

Deal found 6/11

$576

Thu 10/96:45 amMEX - STL

1 stop10h 22mVolaris

Thu 10/239:47 amSTL - MEX

1 stop14h 08mVolaris

Deal found 6/12

$661

Mon 8/181:55 amMEX - STL

2 stops20h 29mWestJet

Mon 8/256:00 amSTL - MEX

2 stops19h 58mWestJet

Deal found 6/11

$1,432

Last-minute flights from Mexico City to St. Louis
Discover last-minute flight deals from Mexico City to St. Louis. Data last updated June 12, 2025 and is based on user searches.

Mon 6/1612:10 pmMEX - STL

1 stop23h 26mAir Canada

Fri 6/202:30 pmSTL - MEX

1 stop9h 45mAir Canada

Deal found 6/9

$541

Wed 6/2511:05 amMEX - STL

1 stop11h 48mFrontier

Fri 6/277:29 pmSTL - MEX

1 stop23h 01mFrontier

Deal found 6/11

$546

Wed 7/211:15 pmMEX - STL

2 stops16h 49mMultiple Airlines

Sun 7/66:36 pmSTL - MEX

2 stops19h 24mMultiple Airlines

Deal found 6/10

$507

Wed 7/212:55 pmMEX - STL

2 stops10h 48mDelta

Sun 7/136:30 amSTL - MEX

1 stop7h 10mDelta

Deal found 6/10

$602

Wed 7/211:35 amMEX - STL

2 stops11h 24mUnited Airlines

Sun 7/136:33 amSTL - MEX

2 stops10h 07mUnited Airlines

Deal found 6/11

$881

One-way flights from Mexico City to St. Louis
Search for one-way flight options from Mexico City to St. Louis. Find affordable one-way fares based on user searches. Data last updated June 12, 2025.

Thu 7/107:00 amMEX - STL

3 stops25h 52mMultiple Airlines

Deal found 6/10

$247

Sat 7/511:05 amMEX - STL

1 stop11h 42mFrontier

Deal found 6/10

$252

Mon 6/237:10 amMEX - STL

1 stop11h 48mAir Canada

Deal found 6/9

$327

Mon 7/73:10 pmMEX - STL

1 stop8h 28mDelta

Deal found 6/10

$356

Sat 7/194:40 amMEX - STL

2 stops17h 05mUnited Airlines

Deal found 6/11

$378

Mon 7/2111:20 pmMEX - STL

1 stop20h 45mAmerican Airlines

Deal found 6/11

$440

Cheapflights Fare Finder

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

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

Tue 8/19

8:10 am-9:11 am

1 stop24h 01m

Lambert-St Louis

Sun 8/24

10:17 am-10:55 pm

1 stop13h 38m

$443

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

Wed 8/6

11:05 am-11:47 pm

1 stop11h 42m

Lambert-St Louis

Sun 8/17

9:15 am-11:10 am

1 stop26h 55m

$483

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

Tue 8/19

4:40 am-2:33 pm

2 stops8h 53m

Lambert-St Louis

Sun 8/24

3:20 pm-8:35 am

2 stops18h 15m

$504

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

Wed 8/6

9:10 am-11:20 pm

2 stops13h 10m

Lambert-St Louis

Sun 8/17

6:00 am-4:50 pm

2 stops11h 50m

$521

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

Mon 6/16

12:10 pm-12:36 pm

1 stop23h 26m

Lambert-St Louis

Fri 6/20

2:30 pm-11:15 pm

1 stop9h 45m

$541

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

Mon 8/18

7:35 am-8:33 pm

2 stops11h 58m

Lambert-St Louis

Sun 8/24

6:00 am-5:20 pm

2 stops12h 20m

$576

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

Mon 8/18

1:55 am-11:24 pm

2 stops20h 29m

Lambert-St Louis

Mon 8/25

6:00 am-12:58 am

2 stops19h 58m

$1,432

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

Thu 7/10

7:00 am-9:52 am

3 stops25h 52m

$247

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

Sat 7/5

11:05 am-11:47 pm

1 stop11h 42m

$252

Mexico CitySt. Louis

MEX - STL

MEXSTL

Mexico City Benito Juarez

Mon 6/23

7:10 am-7:58 pm

1 stop11h 48m

$327

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 13 results

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?

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.

Rainfall in St. Louis by month

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

Temperature in St. Louis by month

If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

Reviews of airlines servicing St. Louis

Delta

8.0

Very good

7,950 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Delta

8.0

Very good

7,950 reviews

Delta

8.0

Very good

7,950 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Aeromexico

7.5

Good

1,706 reviews

Delta

8.0

Very good

7,950 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

United Airlines

7.4

Good

8,790 reviews

Delta

8.0

Very good

7,950 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

American Airlines

7.2

Good

10,000 reviews

Delta

8.0

Very good

7,950 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

WestJet

7.2

Good

2,868 reviews

Delta

8.0

Very good

7,950 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

What are the cheapest airlines flying from Mexico City to St. Louis round-trip?
Frontier, at $443, 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 24% 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 $252 on Frontier. Other airlines that offer cheap prices include Air Canada from $327 and Delta from $356 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

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$247+ 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 7/10. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Mexico City to St. Louis with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Mexico City to St. Louis

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Mexico City to St. Louis

Cheapest flights from Mexico City to St. LouisExplore 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 June 12, 2025.

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 June 12, 2025.

Cheapflights Fare Finder

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

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.

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?

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 June 12, 2025.

Rainfall in St. Louis by month

Plan your trip to St. Louis by taking into account the average rainfall totals by month.

Temperature in St. Louis by month

Plan your trip to St. Louis by taking into account the average temperature totals by month.

Reviews of airlines servicing St. Louis

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?

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

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

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

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

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

Traveling to a place near Mexico City?

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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 June 12, 2025.