Cheap Flights from St. Louis to Buenos Aires from US$633️ 2024

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Find St. Louis to Buenos Aires flights starting at US$633.

Book one-way or return flights from St. Louis to Buenos Aires from as little as US$633. Choose from the popular airlines below and book your flight today!

One way
Round-trip

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

Searching for the best last minute flight from St. Louis to Buenos Aires? Find one-way or return flights that are affordable and fit your itinerary.

Trip.com monitors the ticket fares of flights from St. Louis to Buenos Aires. Stay updated on price trends and snag the best deals for your upcoming trip.

Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.

Find Cheapest Airlines Flying from St. Louis to Buenos Aires

View airlines operating flights from St. Louis to Buenos Aires. Compare prices, find the option that best suits your travel needs, and enjoy a comfortable journey with a trusted airline.

Frontier Airlines

From US$389

Spirit Airlines

From US$406

American Airlines

From US$486

United Airlines

From US$633

Copa Airlines

From US$636

LATAM Airlines

From US$716

Gol Linhas Aereas Inteligentes

From US$734

Delta Air Lines

From US$762

Alaska Airlines

From US$795

Avianca

From US$1,118

ANA airlines

Find more flights and airlines

Alternative Routes for St. Louis to Buenos Aires Flights

Discover different routes, airlines, and transfers and find the best alternative flights for your journey from St. Louis to Buenos Aires.

Cheapest
STL
20:04
60h 46m
2 transfer
EZE
10:50
St. Louis Lambert International Airport - Ministro Pistarini International Airport
Mon, Jun 3Frontier Airlines
US$389
STL
18:30
19h 30m
2 transfer
AEP
16:00
St. Louis Lambert International Airport - Jorge Newbery Airport
Tue, Jun 4LATAM Airlines
US$716
STL
18:30
19h 30m
2 transfer
AEP
16:00
St. Louis Lambert International Airport - Jorge Newbery Airport
Tue, Jun 4LATAM Airlines
US$716
Find More Flights

How do I find the cheapest flights?

When are flight tickets from St. Louis (STL) to Buenos Aires (BUE) the cheapest?
Airlines adjust prices for flights from St. Louis to Buenos Aires based on the date and time of your booking. By analyzing data from all airlines, on Trip.com, you can find the cheapest flight prices on Tuesdays, Wednesdays, and Saturdays.
How much are flights from St. Louis (STL) to Buenos Aires (BUE) cost?
According to Trip.com's data, the lowest price is around US$1,132.
What is the transportation method from the main airport to downtown in Buenos Aires?
- The distance from Ministro Pistarini International Airport to downtown is about 27km, by taxi about 40 minutes.
- The distance from Jorge Newbery Airport to downtown is about 5km, by taxi about 20 minutes.
How many airports in Buenos Aires (BUE)?
There are 2 airport(s) in Buenos Aires (BUE): Jorge Newbery Airport and Ministro Pistarini International Airport.

How to find a cheap flight from St. Louis to Buenos Aires

Wait until the last minute and flight costs are often sky-high. Plan ahead, book the right way, and your savings can soar. We have loads of saving tips to help you find a cheap flight from St. Louis to Buenos Aires. Book your flights at the right time and save more.

Book Early

Once prices are gone, they're gone. Lock in deals while you can!

Compare Flight Prices

Compare prices on travel agency and airline websites.

Look Out for Deals

Check airline and travel agency websites for latest flight deals

Check One-way Fares

Buying two cheap one-way flights can sometimes be a better deal than a round-trip.

Try Different Dates

Flying during the week, early in the morning, or late at night can help save money.

Use the Trip.com App

Save up to £10 per person when booking your flights on Trip.com