$442 Cheap Flights from St. Louis (STL) to Mendoza (MDZ)

View $442 flight on Fri, Oct 31, 2025Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Mendoza (MDZ-Governor Francisco Gabrielli Intl.)

    notification illustration

    Be in the know

    Get alerts if flight prices drop or rise*
    deals illustration

    Book smarter

    Save up to 30% on select hotels after you book a flight*
    trophy illustration

    Earn twice

    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

Cheap Flights from St. Louis to Mendoza (STL-MDZ)

Prices were available within the past 7 days and start at $442 for one-way flights and $835 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Tue, Oct 28 - Wed, Nov 5
STL
St. Louis
MDZ
Mendoza
$835 Roundtrip, found 1 day ago
$835
Roundtrip
found 1 day ago
Select United flight, departing Tue, Oct 28 from St. Louis to Mendoza, returning Wed, Nov 5, priced at $835 found 1 day ago
United
Tue, Nov 11 - Wed, Dec 3
STL
St. Louis
MDZ
Mendoza
$855 Roundtrip, found 1 day ago
$855
Roundtrip
found 1 day ago
Select United flight, departing Tue, Nov 11 from St. Louis to Mendoza, returning Wed, Dec 3, priced at $855 found 1 day ago
United
Tue, Nov 11 - Tue, Dec 2
STL
St. Louis
MDZ
Mendoza
$860 Roundtrip, found 1 day ago
$860
Roundtrip
found 1 day ago
Select United flight, departing Tue, Nov 11 from St. Louis to Mendoza, returning Tue, Dec 2, priced at $860 found 1 day ago
United
Tue, Nov 11 - Sat, Nov 22
STL
St. Louis
MDZ
Mendoza
$905 Roundtrip, found 1 day ago
$905
Roundtrip
found 1 day ago
Select United flight, departing Tue, Nov 11 from St. Louis to Mendoza, returning Sat, Nov 22, priced at $905 found 1 day ago
United
Sun, Nov 16 - Tue, Dec 2
STL
St. Louis
MDZ
Mendoza
$910 Roundtrip, found 1 day ago
$910
Roundtrip
found 1 day ago
Select United flight, departing Sun, Nov 16 from St. Louis to Mendoza, returning Tue, Dec 2, priced at $910 found 1 day ago
United
Mon, Dec 1 - Mon, Dec 15
STL
St. Louis
MDZ
Mendoza
$915 Roundtrip, found 3 days ago
$915
Roundtrip
found 3 days ago
Select United flight, departing Mon, Dec 1 from St. Louis to Mendoza, returning Mon, Dec 15, priced at $915 found 3 days ago
LATAM Airlines Group
Tue, Nov 11 - Mon, Nov 24
STL
St. Louis
MDZ
Mendoza
$1,070 Roundtrip, found 1 day ago
$1,070
Roundtrip
found 1 day ago
Select LATAM Airlines Group flight, departing Tue, Nov 11 from St. Louis to Mendoza, returning Mon, Nov 24, priced at $1,070 found 1 day ago
American Airlines
Wed, Nov 5 - Sun, Nov 16
STL
St. Louis
MDZ
Mendoza
$1,139 Roundtrip, found 2 days ago
$1,139
Roundtrip
found 2 days ago
Select American Airlines flight, departing Wed, Nov 5 from St. Louis to Mendoza, returning Sun, Nov 16, priced at $1,139 found 2 days ago
GOL Linhas Aereas S.A.
Tue, Jan 20 - Thu, Feb 19
STL
St. Louis
MDZ
Mendoza
$1,824 Roundtrip, found 6 days ago
$1,824
Roundtrip
found 6 days ago
Select GOL Linhas Aereas S.A. flight, departing Tue, Jan 20 from St. Louis to Mendoza, returning Thu, Feb 19, priced at $1,824 found 6 days ago
Delta
Fri, May 1 - Sat, May 9
STL
St. Louis
MDZ
Mendoza
$1,951 Roundtrip, found 3 days ago
$1,951
Roundtrip
found 3 days ago
Select Delta flight, departing Fri, May 1 from St. Louis to Mendoza, returning Sat, May 9, priced at $1,951 found 3 days ago

Alternative airports near Mendoza

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Governor Francisco Gabrielli Intl. MDZ. Cheapest and Closest option available. Average driving time to city center is 11 minutes. Flights from $990
MDZ
Governor Francisco Gabrielli Intl.
CheapestClosest
Average driving time to city center11 min
Flights from $990

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to Governor Francisco Gabrielli Intl. Airport (MDZ) cost?
Lock in a cheap one-way flight from $442 or cheap return flight from $835 from Lambert-St. Louis Intl. Airport (STL) to Governor Francisco Gabrielli Intl. Airport (MDZ) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Lambert-St. Louis Intl. Airport (STL) to Governor Francisco Gabrielli Intl. Airport (MDZ)?
October is the most affordable month to fly from STL to MDZ. Traveling outside of peak seasons is often the key to scoring lower fares.
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to Governor Francisco Gabrielli Intl. Airport (MDZ)?
Use the filters on Expedia to compare airlines and find the cheapest carrier that'll take you from STL to MDZ. Then, sort your results by "Price (lowest to highest)" to score a great deal.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Governor Francisco Gabrielli Intl. Airport (MDZ)?
You'll have to hop on a flight with a layover if you're traveling from Lambert-St. Louis Intl. Airport (STL) to Governor Francisco Gabrielli Intl. Airport (MDZ). Direct flights don't operate daily on this route. However, simply filter your search to include one or two stops to find an option that works for you.
What day of the week has the most flights from STL to MDZ?
Friday is generally the busiest day for flights, while Tuesday is often the quietest.* Remember that flight schedules can change depending on various factors, including the time of year and carrier.*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 Governor Francisco Gabrielli Intl. Airport (MDZ)?
To land at Governor Francisco Gabrielli Intl. Airport (MDZ) on time, choose a flight that takes off from Lambert-St. Louis Intl. Airport (STL) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this hour.**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 Governor Francisco Gabrielli Intl. Airport (MDZ) last-minute?
Holding off until just before your trip to book a ticket from STL to MDZ generally means paying more. While you may come across some last-minute discounts, they're not always guaranteed. Be flexible with your travel plans for the best chance of snagging a bargain.
Is it cheaper to book a STL to MDZ flight and hotel package?
You can save money by booking a STL to MDZ flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's easy to manage it all in one place. After choosing your ideal accommodations and flights, consider adding extras including tours, activities and car rentals.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Governor Francisco Gabrielli Intl. Airport (MDZ)?
In most instances, you can modify or cancel your STL to MDZ flight. However, there may be additional fees, especially if you made your booking more than 24 hours ago. Double-check your itinerary for the airline's fees and guidelines on flight changes, or if you want more details, visit our Customer Service portal.

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Governor Francisco Gabrielli Intl.
Airlines serving
American Airlines, Copa, Delta, GOL Linhas Aereas S.A., LATAM Airlines Group
Roundtrip price
$834
Distance
5134 mi

Book with confidence

St. Louis to Mendoza Flights

The cheapest times to fly from St. Louis to Mendoza

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 Mendoza are during the month of October. You can find some of the cheapest flights from St. Louis to Mendoza with Expedia's search tool and vast selection of airlines.

 

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

Sunday is one of the best days to book for cheap flights from St. Louis to Mendoza: 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 Mendoza

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 Mendoza in 2025. You can also book with separate airlines for your outbound and return journeys, from $442 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 Mendoza 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 Mendoza 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 Mendoza Flights

Explore a world of travel with Expedia

*Available to One Key members.