$577 Cheap Flights from Buenos Aires (EZE) to St. Louis (STL)

View $577 flight on Wed, Nov 12, 2025Opens in a new window

Popular airlines from Ministro Pistarini Intl. Airport (EZE) to St. Louis Lambert Intl. Airport (STL)

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Cheap Flights from Buenos Aires to St. Louis (EZE-STL)

Prices were available within the past 7 days and start at $577 for one-way flights and $876 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Mon, Nov 10 - Mon, Nov 17
EZE
Buenos Aires
STL
St. Louis
$876 Roundtrip, found 12 hours ago
$876
Roundtrip
found 12 hours ago
Select American Airlines flight, departing Mon, Nov 10 from Buenos Aires to St. Louis, returning Mon, Nov 17, priced at $876 found 12 hours ago
Delta
Mon, Nov 10 - Mon, Nov 17
EZE
Buenos Aires
STL
St. Louis
$876 Roundtrip, found 12 hours ago
$876
Roundtrip
found 12 hours ago
Select Delta flight, departing Mon, Nov 10 from Buenos Aires to St. Louis, returning Mon, Nov 17, priced at $876 found 12 hours ago
United
Mon, Nov 10 - Mon, Nov 17
EZE
Buenos Aires
STL
St. Louis
$876 Roundtrip, found 12 hours ago
$876
Roundtrip
found 12 hours ago
Select United flight, departing Mon, Nov 10 from Buenos Aires to St. Louis, returning Mon, Nov 17, priced at $876 found 12 hours ago
United
Mon, Nov 10 - Mon, Nov 17
EZE
Buenos Aires
STL
St. Louis
$881 Roundtrip, found 12 hours ago
$881
Roundtrip
found 12 hours ago
Select United flight, departing Mon, Nov 10 from Buenos Aires to St. Louis, returning Mon, Nov 17, priced at $881 found 12 hours ago
American Airlines
Mon, Nov 10 - Mon, Nov 17
EZE
Buenos Aires
STL
St. Louis
$884 Roundtrip, found 12 hours ago
$884
Roundtrip
found 12 hours ago
Select American Airlines flight, departing Mon, Nov 10 from Buenos Aires to St. Louis, returning Mon, Nov 17, priced at $884 found 12 hours ago
United
Mon, Nov 10 - Mon, Nov 17
EZE
Buenos Aires
STL
St. Louis
$884 Roundtrip, found 12 hours ago
$884
Roundtrip
found 12 hours ago
Select United flight, departing Mon, Nov 10 from Buenos Aires to St. Louis, returning Mon, Nov 17, priced at $884 found 12 hours ago
American Airlines
Mon, Nov 10 - Mon, Nov 17
EZE
Buenos Aires
STL
St. Louis
$886 Roundtrip, found 12 hours ago
$886
Roundtrip
found 12 hours ago
Select American Airlines flight, departing Mon, Nov 10 from Buenos Aires to St. Louis, returning Mon, Nov 17, priced at $886 found 12 hours ago
Delta
Mon, Feb 16 - Tue, Mar 3
EZE
Buenos Aires
STL
St. Louis
$891 Roundtrip, found 1 day ago
$891
Roundtrip
found 1 day ago
Select Delta flight, departing Mon, Feb 16 from Buenos Aires to St. Louis, returning Tue, Mar 3, priced at $891 found 1 day ago
LATAM Airlines Group
Mon, Nov 10 - Mon, Nov 17
EZE
Buenos Aires
STL
St. Louis
$903 Roundtrip, found 12 hours ago
$903
Roundtrip
found 12 hours ago
Select LATAM Airlines Group flight, departing Mon, Nov 10 from Buenos Aires to St. Louis, returning Mon, Nov 17, priced at $903 found 12 hours ago
Copa
Wed, Aug 19 - Tue, Sep 15
EZE
Buenos Aires
STL
St. Louis
$2,467 Roundtrip, found 2 days ago
$2,467
Roundtrip
found 2 days ago
Select Copa flight, departing Wed, Aug 19 from Buenos Aires to St. Louis, returning Tue, Sep 15, priced at $2,467 found 2 days ago

Frequently asked questions

How much does a flight from Ministro Pistarini Intl. Airport (EZE) to Lambert-St. Louis Intl. Airport (STL) cost?
Get a cheap one-way flight from $577 or cheap return flight from $876 from Ministro Pistarini Intl. Airport (EZE) to Lambert-St. Louis Intl. Airport (STL) 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 Ministro Pistarini Intl. Airport (EZE) to Lambert-St. Louis Intl. Airport (STL)?
Planning your trip for November may help you find better deals, as it's the cheapest month for flights between EZE and STL. You'll usually find the lowest fares during off-peak months.
What is the cheapest airline that flies from Ministro Pistarini Intl. Airport (EZE) to Lambert-St. Louis Intl. Airport (STL)?
Expedia's filter tool lets you easily compare airlines, flight times and baggage options all in one place. Select your preferences, then sort by "Price (lowest to highest)" to see which carrier offers the cheapest EZE to STL flight.
How many flights per day from Ministro Pistarini Intl. Airport (EZE) to Lambert-St. Louis Intl. Airport (STL)?
You'll have to book a flight with a layover when traveling from Ministro Pistarini Intl. Airport (EZE) to Lambert-St. Louis Intl. Airport (STL). Direct flights don't operate daily on this route. However, just filter your search to include one or two stops to discover the best option for your trip.
What day of the week has the most flights from EZE to STL?
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 Ministro Pistarini Intl. Airport (EZE) to Lambert-St. Louis Intl. Airport (STL)?
To avoid possible delays on the Ministro Pistarini Intl. Airport (EZE) to Lambert-St. Louis Intl. Airport (STL) route, travel before 3 PM. Later departures have a 22% higher chance of cancellation.**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 Ministro Pistarini Intl. Airport (EZE) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Booking your ticket from EZE to STL shortly before your journey is generally more expensive. However, if you're flexible with your departure times and dates, you could snag a cheap last-minute fare.
Is it cheaper to book an EZE to STL flight and hotel package?
Booking an EZE to STL flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Choose from our wide range of stays and then add car rentals, activities and flights to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Ministro Pistarini Intl. Airport (EZE) to Lambert-St. Louis Intl. Airport (STL)?
In most cases, you can reschedule or cancel your EZE to STL flight. However, there may be additional fees, especially if you booked more than 24 hours ago. Check your itinerary for the airline's fees and guidelines on flight changes, or if you want more details, head to our Customer Service portal.

Travel information

Origin airport
Ministro Pistarini Intl.
Destination airport
Lambert-St. Louis Intl.
Airlines serving
Air Canada, American Airlines, Copa, Delta, LATAM Airlines Group, United
Roundtrip price
$876
Distance
5474 mi

Book with confidence

Buenos Aires to St. Louis Flights

The cheapest times to fly from Buenos Aires to St. Louis

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

 

The best time to book a flight from Buenos Aires to St. Louis

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

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 Buenos Aires to St. Louis in 2025. You can also book with separate airlines for your outbound and return journeys, from $577 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 Buenos Aires to St. Louis 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 Buenos Aires to St. Louis 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.

 

Buenos Aires to St. Louis Flights

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*Available to One Key members.