The cheapest times to fly from AEP to STL are

  • January 29th to February 25th
  • March 19th to July 1st (except the weeks of April 2nd and June 18th)
  • October 22nd to December 2nd (except the week of October 29th)

based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from AEP to STL is mid November. Prices can be as high as $3508 for Friday flights during early January, or as low as $1359 for Tuesday flights around mid November.


When to Fly to St. Louis

Flying from Buenos Aires (AEP) to St. Louis, MO (STL) will usually cost between $1368 to $2381 per person if booking more than four weeks in advance. On average the very cheapest time to fly is mid November with an average ticket price of $1476. Due to high demand the most expensive time to fly is early January, with an average price of $2653. Planning your trip to low-cost times can easily save you $1177 on economy flights and even more on first-class flights. Generally, any price below $1607 can be considered a good price for a round-trip AEP to STL flight.

See below for a graph of average weekly prices for the AEP to STL route. All prices are for round-trip tickets in USD.

AEP to STL Flight Prices

Compared to other flights, the AEP to STL flight is more expensive than the average and costs about as much as the average flight leaving from Buenos Aires. The average price per mile (for a direct flight) is $0.18, which is below average.


Flight Prices by Day of the Week

Tuesday is usually the cheapest day to depart and return on this flight. Fridays are the most expensive days to fly out or take a return trip. Selecting flights on the least expensive days could save you up to $332 (17%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Tuesday and returning a week later will cost an average of $1453. Return trip prices are from the STL to AEP flight, and often highlight the quality of our data in showing the same trend.

Departing Prices by Day

Departure Day Prices

Return Trip Prices by Day

Return Day Prices


Nonstop Flights and Layovers

Travelers looking to fly from AEP to STL can generally find a 0-layover flight. Because there is a direct flight option the real-world direct flight time of 10 hour 49 minutes may be realistic.


Flight Hacking AEP to STL

Flight hacking is when you book two tickets instead of a layover, sometimes with different airlines. You will need to either bring only a carry-on bag (highly recommended) or leave yourself plenty of time to go through security again. Flight hacking is completely allowed, but airlines don’t always tell you the cheapest way to get from AEP to STL — but Champion Traveler does!

Hack #1: Miami, FL (AEP > MIA > STL)

  • Price for both tickets: $1032
  • Average savings: $576 (35.81%)

See AEP to JFK flights

Hack #2: New York, NY (AEP > JFK > STL)

  • Price for both tickets: $1064
  • Average savings: $543 (33.79%)

See AEP to MIA flights

Hack #3: Orlando, FL (AEP > MCO > STL)

  • Price for both tickets: $1087
  • Average savings: $521 (32.39%)

See AEP to MCO flights


Flight Questions Answered

Still have questions about flying from AEP to STL? We’ve got answers.

Which airlines fly this route?

You can find 6 major airlines flying this route most often: Aerolineas Argentinas, American, COPA, Delta, LATAM, United, and potentially more during busy seasons.

How far away is it from St Louis Lambert International Airport to Aeroparque Jorge Newbery Airport?

The distance between the two airports is roughly 5461 miles or 8789 kilometers.

How long does it take to fly from AEP to STL?

The real-world flight time for a nonstop AEP to STL flight is about 10 hour 49 minutes.

How many flights go between Buenos Aires and St. Louis, MO?

It depends on the day of the week and the date, but a typical day might have around 3 available flights from AEP to STL.


Airport Location Info


Departing Airport

Origination code AEP
Origination airport name Aeroparque Jorge Newbery Airport
City Buenos Aires
Country Argentina
Latitude -34.6
Longitude -58.4

Return Airport

Destination code STL
Destination airport name St Louis Lambert International Airport
City St. Louis, MO
Country the United States
Latitude 38.7
Longitude -90.4


Other Resources

Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.