$227 Cheap Flights from St. Louis (STL) to Monterrey (MTY)

View $227 flight on Thu, Oct 16, 2025Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to General Mariano Escobedo Intl. Airport (MTY)

Cheap Flights from St. Louis to Monterrey (STL-MTY)

Prices were available within the past 7 days and start at $227 for one-way flights and $494 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Mon, Sep 22 - Wed, Oct 1
STL
St. Louis
MTY
Monterrey
$494 Roundtrip, found 5 hours ago
$494
Roundtrip
found 5 hours ago
Select Air Canada flight, departing Mon, Sep 22 from St. Louis to Monterrey, returning Wed, Oct 1, priced at $494 found 5 hours ago
Frontier Airlines
Tue, Feb 3 - Tue, Feb 17
STL
St. Louis
MTY
Monterrey
$496 Roundtrip, found 6 days ago
$496
Roundtrip
found 6 days ago
Select Frontier Airlines flight, departing Tue, Feb 3 from St. Louis to Monterrey, returning Tue, Feb 17, priced at $496 found 6 days ago
United
Thu, Jan 1 - Thu, Jan 8
STL
St. Louis
MTY
Monterrey
$505 Roundtrip, found 2 days ago
$505
Roundtrip
found 2 days ago
Select United flight, departing Thu, Jan 1 from St. Louis to Monterrey, returning Thu, Jan 8, priced at $505 found 2 days ago
Delta
Tue, Mar 10 - Mon, Mar 16
STL
St. Louis
MTY
Monterrey
$505 Roundtrip, found 4 days ago
$505
Roundtrip
found 4 days ago
Select Delta flight, departing Tue, Mar 10 from St. Louis to Monterrey, returning Mon, Mar 16, priced at $505 found 4 days ago
Aeromexico
Thu, Jan 22 - Thu, Jan 29
STL
St. Louis
MTY
Monterrey
$505 Roundtrip, found 2 days ago
$505
Roundtrip
found 2 days ago
Select Aeromexico flight, departing Thu, Jan 22 from St. Louis to Monterrey, returning Thu, Jan 29, priced at $505 found 2 days ago
Delta
Mon, Mar 9 - Mon, Mar 16
STL
St. Louis
MTY
Monterrey
$510 Roundtrip, found 4 days ago
$510
Roundtrip
found 4 days ago
Select Delta flight, departing Mon, Mar 9 from St. Louis to Monterrey, returning Mon, Mar 16, priced at $510 found 4 days ago
Delta
Wed, Dec 17 - Mon, Dec 29
STL
St. Louis
MTY
Monterrey
$515 Roundtrip, found 5 days ago
$515
Roundtrip
found 5 days ago
Select Delta flight, departing Wed, Dec 17 from St. Louis to Monterrey, returning Mon, Dec 29, priced at $515 found 5 days ago
Delta
Thu, Mar 12 - Mon, Mar 23
STL
St. Louis
MTY
Monterrey
$516 Roundtrip, found 6 days ago
$516
Roundtrip
found 6 days ago
Select Delta flight, departing Thu, Mar 12 from St. Louis to Monterrey, returning Mon, Mar 23, priced at $516 found 6 days ago
Frontier Airlines
Wed, Oct 1 - Thu, Oct 16
STL
St. Louis
MTY
Monterrey
$519 Roundtrip, found 3 days ago
$519
Roundtrip
found 3 days ago
Select Frontier Airlines flight, departing Wed, Oct 1 from St. Louis to Monterrey, returning Thu, Oct 16, priced at $519 found 3 days ago
United
Thu, Jan 1 - Thu, Jan 8
STL
St. Louis
MTY
Monterrey
$524 Roundtrip, found 2 days ago
$524
Roundtrip
found 2 days ago
Select United flight, departing Thu, Jan 1 from St. Louis to Monterrey, returning Thu, Jan 8, priced at $524 found 2 days ago

Find the cheapest month to fly from St. Louis (STL) to Monterrey (MTY)

April is typically the cheapest month to fly

From $437 - $861 per traveler.

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to General Mariano Escobedo Intl. Airport (MTY) cost?
Secure a cheap one-way flight from $227 or cheap return flight from $494 from Lambert-St. Louis Intl. Airport (STL) to General Mariano Escobedo Intl. Airport (MTY) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Lambert-St. Louis Intl. Airport (STL) to General Mariano Escobedo Intl. Airport (MTY)?
September is the least expensive month to fly from STL to MTY. Traveling during quieter months is often the key to finding a great deal.
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to General Mariano Escobedo Intl. Airport (MTY)?
Use the filters on Expedia to compare different airlines and find the most affordable carrier that'll take you from STL to MTY. Then, sort your results by "Price (lowest to highest)" to snag the best deal available.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to General Mariano Escobedo Intl. Airport (MTY)?
There are no daily nonstop flights departing from Lambert-St. Louis Intl. Airport (STL) to General Mariano Escobedo Intl. Airport (MTY). But you can book flights with layovers. Filter your search on Expedia to include one or two stops, and you'll be cruising above the clouds before you know it.
What day of the week has the most flights from STL to MTY?
You'll typically find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can change from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Lambert-St. Louis Intl. Airport (STL) to General Mariano Escobedo Intl. Airport (MTY)?
Select a flight from Lambert-St. Louis Intl. Airport (STL) to General Mariano Escobedo Intl. Airport (MTY) that leaves before 3 PM to reduce the risk of delays and cancellations. Departures after this hour are on average 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Lambert-St. Louis Intl. Airport (STL) to General Mariano Escobedo Intl. Airport (MTY) last-minute?
Booking your plane ticket from STL to MTY just before your getaway is usually more expensive. But if there's some wiggle room with your travel times and dates, you could land a cheap last-minute fare.
Is it cheaper to book a STL to MTY flight and hotel package?
Compared with arranging flights and hotels separately, booking a STL to MTY flight and hotel package with Expedia could result in significant savings. What's more, having everything in one place takes the hassle out of travel planning. Simply secure your flights and choose from our extensive range of stays, then tailor your trip with other add-ons like tours, car rentals and activities.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to General Mariano Escobedo Intl. Airport (MTY)?
In most cases, you can cancel or reschedule your STL to MTY flight. However, there may be additional fees, especially if you booked over 24 hours ago. Double-check your itinerary for the airline's fees and guidelines on flight changes, or if you need further information, go to our Customer Service portal.

Travel information

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
General Mariano Escobedo Intl.
Airlines serving
Aeromexico, Air Canada, American Airlines, Delta, United
Roundtrip price
$493
Distance
1059 mi

Book with confidence

Book with confidence

St. Louis to Monterrey Flights

The cheapest times to fly from St. Louis to Monterrey

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from St. Louis to Monterrey are during the month of September. You can find some of the cheapest flights from St. Louis to Monterrey with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from St. Louis to Monterrey

Sunday is one of the best days to book for cheap flights from St. Louis to Monterrey: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from St. Louis to Monterrey

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from St. Louis to Monterrey in 2025. You can also book with separate airlines for your outbound and return journeys, from $227 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap St. Louis to Monterrey flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your St. Louis to Monterrey airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

St. Louis to Monterrey Flights

Explore a world of travel with Expedia

Explore a world of travel with Expedia

*Available to One Key members.