$56 Cheap Flights from Posadas (PSS) to Buenos Aires (AEP)

View $56 flight on Thu, Jan 1, 2026Opens in a new window

Popular airlines from Posadas (PSS-Libertador General Jose de San Martin) to Buenos Aires (AEP-Aeroparque Jorge Newbery)

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Find available prices by choosing your travel dates.

Cheap Flights from Posadas to Buenos Aires (PSS-AEP)

Prices were available within the past 7 days and start at $56 for one-way flights and $112 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Aerolineas Argentinas
Thu, Jun 26 - Tue, Jul 1
PSS
Posadas
AEP
Buenos Aires
$112 Roundtrip, found 4 hours ago
$112
Roundtrip
found 4 hours ago
Select Aerolineas Argentinas flight, departing Thu, Jun 26 from Posadas to Buenos Aires, returning Tue, Jul 1, priced at $112 found 4 hours ago
Aerolineas Argentinas
Thu, Jun 26 - Tue, Jul 1
PSS
Posadas
AEP
Buenos Aires
$119 Roundtrip, found 4 hours ago
$119
Roundtrip
found 4 hours ago
Select Aerolineas Argentinas flight, departing Thu, Jun 26 from Posadas to Buenos Aires, returning Tue, Jul 1, priced at $119 found 4 hours ago
Aerolineas Argentinas
Thu, Jul 3 - Wed, Jul 9
PSS
Posadas
AEP
Buenos Aires
$119 Roundtrip, found 1 day ago
$119
Roundtrip
found 1 day ago
Select Aerolineas Argentinas flight, departing Thu, Jul 3 from Posadas to Buenos Aires, returning Wed, Jul 9, priced at $119 found 1 day ago
Aerolineas Argentinas
Thu, Jun 26 - Tue, Jul 1
PSS
Posadas
AEP
Buenos Aires
$124 Roundtrip, found 4 hours ago
$124
Roundtrip
found 4 hours ago
Select Aerolineas Argentinas flight, departing Thu, Jun 26 from Posadas to Buenos Aires, returning Tue, Jul 1, priced at $124 found 4 hours ago
Aerolineas Argentinas
Tue, Jun 3 - Wed, Jun 4
PSS
Posadas
AEP
Buenos Aires
$125 Roundtrip, found 16 hours ago
$125
Roundtrip
found 16 hours ago
Select Aerolineas Argentinas flight, departing Tue, Jun 3 from Posadas to Buenos Aires, returning Wed, Jun 4, priced at $125 found 16 hours ago
Aerolineas Argentinas
Sat, May 31 - Tue, Jun 3
PSS
Posadas
AEP
Buenos Aires
$131 Roundtrip, found 16 hours ago
$131
Roundtrip
found 16 hours ago
Select Aerolineas Argentinas flight, departing Sat, May 31 from Posadas to Buenos Aires, returning Tue, Jun 3, priced at $131 found 16 hours ago
Aerolineas Argentinas
Sat, May 31 - Thu, Jun 12
PSS
Posadas
AEP
Buenos Aires
$131 Roundtrip, found 1 day ago
$131
Roundtrip
found 1 day ago
Select Aerolineas Argentinas flight, departing Sat, May 31 from Posadas to Buenos Aires, returning Thu, Jun 12, priced at $131 found 1 day ago
Aerolineas Argentinas
Sat, May 31 - Tue, Jun 17
PSS
Posadas
AEP
Buenos Aires
$136 Roundtrip, found 16 hours ago
$136
Roundtrip
found 16 hours ago
Select Aerolineas Argentinas flight, departing Sat, May 31 from Posadas to Buenos Aires, returning Tue, Jun 17, priced at $136 found 16 hours ago
Aerolineas Argentinas
Fri, May 23 - Mon, May 26
PSS
Posadas
AEP
Buenos Aires
$137 Roundtrip, found 2 days ago
$137
Roundtrip
found 2 days ago
Select Aerolineas Argentinas flight, departing Fri, May 23 from Posadas to Buenos Aires, returning Mon, May 26, priced at $137 found 2 days ago
Aerolineas Argentinas
Sun, Jun 8 - Wed, Jun 18
PSS
Posadas
AEP
Buenos Aires
$147 Roundtrip, just found
$147
Roundtrip
just found
Select Aerolineas Argentinas flight, departing Sun, Jun 8 from Posadas to Buenos Aires, returning Wed, Jun 18, priced at $147 just found
Flights from Posadas (PSS) to Buenos Aires (AEP)
Origin airport
Libertador General Jose de San Martin
Destination airport
Aeroparque Jorge Newbery
Airlines serving
Aerolineas Argentinas
Roundtrip price
$112
Distance
515 mi

Posadas to Buenos Aires Flights

The cheapest times to fly from Posadas to Buenos Aires

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

 

The best time to book a flight from Posadas to Buenos Aires

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

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 Posadas to Buenos Aires in 2025. You can also book with separate airlines for your outbound and return journeys, from $56 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 Posadas to Buenos Aires 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 Posadas to Buenos Aires 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.

 

Frequently asked questions

How much does a flight from Libertador General Jose de San Martin Airport (PSS) to Aeroparque Jorge Newbery Airport (AEP) cost?
You can land cheap return tickets from Libertador General Jose de San Martin Airport (PSS) to Aeroparque Jorge Newbery Airport (AEP) starting at $112. Grab your seat and start your adventure. This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a Aerolineas Argentinas flight leaving PSS on May 21 2025 and touching down at AEP. The price was last updated on April 24 2025 and has not changed since.
What is the cheapest month to fly from PSS to AEP?
The cheapest flights from PSS to AEP are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from Libertador General Jose de San Martin Airport (PSS) to Aeroparque Jorge Newbery Airport (AEP)?
You can fly nonstop from Libertador General Jose de San Martin Airport (PSS) to Aeroparque Jorge Newbery Airport (AEP) on an Aerolineas Argentinas flight.
What is the cheapest airline that flies from PSS to AEP?
With tickets starting at $56 for a one-way flight from PSS to AEP, Aerolineas Argentinas is currently the cheapest airline operating this route. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from PSS on June 11 2025. Prices were last updated on April 24 2025 and have not changed since.
How many flights per day from Libertador General Jose de San Martin Airport (PSS) to Aeroparque Jorge Newbery Airport (AEP)?
Every day on average, 3 nonstop flights operate from Libertador General Jose de San Martin Airport (PSS) to Aeroparque Jorge Newbery Airport (AEP). Choose the departure date that best suits your travel plans.
What are the most popular departure times for flights from Libertador General Jose de San Martin Airport (PSS) to Aeroparque Jorge Newbery Airport (AEP)?
The 10 AM departures from PSS to AEP are the top choice for many travelers. Prices can be higher for these popular slots. If you want to save on your fare, pick a less crowded time to fly.
What day of the week has the most flights from PSS to AEP?
Saturday offers the most flights from Libertador General Jose de San Martin Airport (PSS) to Aeroparque Jorge Newbery Airport (AEP). Consider jetting off on this day and you’ll have the best chance of finding a departure that fits your itinerary.
What is the earliest flight from Libertador General Jose de San Martin Airport (PSS) to Aeroparque Jorge Newbery Airport (AEP)?
Libertador General Jose de San Martin Airport (PSS)’s first flight to Aeroparque Jorge Newbery Airport (AEP) takes off at approximately 8:55AM UTC-3. With a travel duration of 1h 40m, you’ll touch down at around 10:35AM UTC-3.
How long does it take to fly from Libertador General Jose de San Martin Airport (PSS) to Aeroparque Jorge Newbery Airport (AEP)?
It takes about 1 hour and 35 minutes to cover the 520 mi from PSS to AEP.
What is the best time to fly from Libertador General Jose de San Martin Airport (PSS) to Aeroparque Jorge Newbery Airport (AEP)?
To arrive at Aeroparque Jorge Newbery Airport (AEP) without delays, opt for a flight that takes off from Libertador General Jose de San Martin Airport (PSS) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this time.**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.
What airports do you fly into for Buenos Aires from Libertador General Jose de San Martin Airport (PSS)?
Take a direct flight from Libertador General Jose de San Martin Airport (PSS) to Buenos Aires and arrive at Aeroparque Jorge Newbery Airport (AEP). Another convenient entry point into this destination is Ministro Pistarini Intl. Airport (EZE).
Is it cheaper to buy a plane ticket from Libertador General Jose de San Martin Airport (PSS) to Aeroparque Jorge Newbery Airport (AEP) last-minute?
Waiting until right before your break to book your flight from PSS to AEP often results in higher prices. While you may find some last-minute deals, they aren’t always guaranteed. Keep your travel schedule open to boost your chances of snagging a bargain.
Is it cheaper to book a PSS to AEP flight and hotel package?
You’ll generally save money by securing a PSS to AEP 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 convenient place. After choosing your preferred accommodations and flights, consider adding extras like car rentals, activities and tours.
Can I cancel or change the date of my flight from Libertador General Jose de San Martin Airport (PSS) to Aeroparque Jorge Newbery Airport (AEP)?
In most instances, you can modify or cancel your PSS to AEP flight. However, additional charges may apply, especially if you made your booking more than 24 hours ago. Double-check your itinerary for the airline’s guidelines and fees on flight changes, or if you want more information, go to our Customer Service portal.

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