$126 Cheap Flights from Buenos Aires (AEP) to Posadas (PSS)

View $126 flight on Sat, Apr 4, 2026Opens in a new window

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

  • Be in the know

    Get alerts if flight prices drop or rise*

  • Book smarter

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

  • Earn twice

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

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

Prices were available within the past 7 days and start at $126 for one-way flights and $220 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Aerolineas Argentinas
Thu, Oct 15 - Mon, Oct 19
AEP
Buenos Aires
PSS
Posadas
$220 Roundtrip, found 6 days ago
$220
Roundtrip
found 6 days ago
Select Aerolineas Argentinas flight, departing Thu, Oct 15 from Buenos Aires to Posadas, returning Mon, Oct 19, priced at $220 found 6 days ago
Aerolineas Argentinas
Wed, May 20 - Fri, May 22
AEP
Buenos Aires
PSS
Posadas
$251 Roundtrip, found 4 days ago
$251
Roundtrip
found 4 days ago
Select Aerolineas Argentinas flight, departing Wed, May 20 from Buenos Aires to Posadas, returning Fri, May 22, priced at $251 found 4 days ago
Aerolineas Argentinas
Fri, Apr 10 - Mon, Apr 20
AEP
Buenos Aires
PSS
Posadas
$280 Roundtrip, found 7 hours ago
$280
Roundtrip
found 7 hours ago
Select Aerolineas Argentinas flight, departing Fri, Apr 10 from Buenos Aires to Posadas, returning Mon, Apr 20, priced at $280 found 7 hours ago
Aerolineas Argentinas
Wed, May 20 - Fri, May 22
AEP
Buenos Aires
PSS
Posadas
$298 Roundtrip, found 4 days ago
$298
Roundtrip
found 4 days ago
Select Aerolineas Argentinas flight, departing Wed, May 20 from Buenos Aires to Posadas, returning Fri, May 22, priced at $298 found 4 days ago
Aerolineas Argentinas
Thu, Apr 9 - Thu, Apr 30
AEP
Buenos Aires
PSS
Posadas
$298 Roundtrip, found 5 days ago
$298
Roundtrip
found 5 days ago
Select Aerolineas Argentinas flight, departing Thu, Apr 9 from Buenos Aires to Posadas, returning Thu, Apr 30, priced at $298 found 5 days ago
Aerolineas Argentinas
Thu, Oct 15 - Mon, Oct 19
AEP
Buenos Aires
PSS
Posadas
$300 Roundtrip, found 6 days ago
$300
Roundtrip
found 6 days ago
Select Aerolineas Argentinas flight, departing Thu, Oct 15 from Buenos Aires to Posadas, returning Mon, Oct 19, priced at $300 found 6 days ago
Aerolineas Argentinas
Fri, Jul 3 - Mon, Jul 20
AEP
Buenos Aires
PSS
Posadas
$301 Roundtrip, found 1 day ago
$301
Roundtrip
found 1 day ago
Select Aerolineas Argentinas flight, departing Fri, Jul 3 from Buenos Aires to Posadas, returning Mon, Jul 20, priced at $301 found 1 day ago
Aerolineas Argentinas
Fri, Apr 10 - Mon, Apr 20
AEP
Buenos Aires
PSS
Posadas
$311 Roundtrip, found 7 hours ago
$311
Roundtrip
found 7 hours ago
Select Aerolineas Argentinas flight, departing Fri, Apr 10 from Buenos Aires to Posadas, returning Mon, Apr 20, priced at $311 found 7 hours ago
Aerolineas Argentinas
Sat, May 23 - Mon, May 25
AEP
Buenos Aires
PSS
Posadas
$321 Roundtrip, found 6 days ago
$321
Roundtrip
found 6 days ago
Select Aerolineas Argentinas flight, departing Sat, May 23 from Buenos Aires to Posadas, returning Mon, May 25, priced at $321 found 6 days ago
Aerolineas Argentinas
Sun, Mar 22 - Sun, Mar 29
AEP
Buenos Aires
PSS
Posadas
$323 Roundtrip, found 4 days ago
$323
Roundtrip
found 4 days ago
Select Aerolineas Argentinas flight, departing Sun, Mar 22 from Buenos Aires to Posadas, returning Sun, Mar 29, priced at $323 found 4 days ago

The Annual Vacation Sale

Members save up to 40% on hotels and homes. Plan this year’s big trip and save.
Book now

Frequently asked questions

How much does a flight from Buenos Aires (AEP-Aeroparque Jorge Newbery) to Posadas (PSS-Libertador General Jose de San Martin) cost?
You can find cheap one-way flights from $126 and cheap return flights from $220 Buenos Aires (AEP-Aeroparque Jorge Newbery) to Posadas (PSS-Libertador General Jose de San Martin) with Expedia. One-way flights generally range between $78 and $384, and roundtrip flights usually range from $169 to $913. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Buenos Aires (AEP-Aeroparque Jorge Newbery) to Posadas (PSS-Libertador General Jose de San Martin) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Buenos Aires (AEP-Aeroparque Jorge Newbery) to Posadas (PSS-Libertador General Jose de San Martin)?
The cheapest month to fly from AEP to PSS is October when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you're able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Buenos Aires (AEP-Aeroparque Jorge Newbery) to Posadas (PSS-Libertador General Jose de San Martin)?
You can fly direct from AEP to PSS on Aerolineas Argentinas, with around 20 flights per week.
What is the cheapest airline that flies from Buenos Aires (AEP-Aeroparque Jorge Newbery) to Posadas (PSS-Libertador General Jose de San Martin)?
Aerolineas Argentinas is one of the cheapest airlines offering nonstop flights from Aeroparque Jorge Newbery (AEP) to Libertador General Jose de San Martin (PSS), with round-trip tickets starting from around $480. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Buenos Aires (AEP-Aeroparque Jorge Newbery) to Posadas (PSS-Libertador General Jose de San Martin)?
To find a cheap flight from Buenos Aires (AEP-Aeroparque Jorge Newbery) to Posadas (PSS-Libertador General Jose de San Martin), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best airline to fly with from Buenos Aires (AEP-Aeroparque Jorge Newbery) to Posadas (PSS-Libertador General Jose de San Martin)?
The best airline to fly with from Buenos Aires (AEP) to Posadas (PSS) will differ from traveler to traveler. If you like to fly early, Aerolineas Argentinas offers early morning flights. If price is the most important factor, Aerolineas Argentinas typically offers the lowest fares. Aerolineas Argentinas also offers the most daily flights from AEP to PSS, which is great if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
What is the best time to fly from Buenos Aires (AEP-Aeroparque Jorge Newbery) to Posadas (PSS-Libertador General Jose de San Martin)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from Buenos Aires (AEP-Aeroparque Jorge Newbery) to Posadas (PSS-Libertador General Jose de San Martin)?
There are approximately 3 nonstop flights per day from Aeroparque Jorge Newbery (AEP) to Libertador General Jose de San Martin (PSS). For more options, look at flights that include layovers.
What is the earliest flight from Buenos Aires (AEP-Aeroparque Jorge Newbery) to Posadas (PSS-Libertador General Jose de San Martin)?
The earliest flight from Aeroparque Jorge Newbery (AEP) to Libertador General Jose de San Martin Airport (PSS) typically departs at 6:45 AM, operated by Aerolineas Argentinas. This early flight can help you make the most of your day in Posadas. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Buenos Aires (AEP-Aeroparque Jorge Newbery) to Posadas (PSS-Libertador General Jose de San Martin)?
When flying from Buenos Aires (AEP) to Posadas (PSS), the most popular departure times are in the evening, from 6pm to 9pm. About 23% of passengers choose this time window. Aerolineas Argentinas operates flights during this period. This timing works well for travelers looking to wrap up their day in Buenos Aires before heading out.
How long does it take to fly from Buenos Aires (AEP-Aeroparque Jorge Newbery) to Posadas (PSS-Libertador General Jose de San Martin)?
Direct flights from AEP to PSS usually take about 1 hour 50 minutes, traveling roughly 516 miles. If you opt for a connecting flight, expect to add around 17 hours 30 minutes to your journey. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Buenos Aires (AEP-Aeroparque Jorge Newbery) to Posadas (PSS-Libertador General Jose de San Martin)?
Select the "Business class" and "First class" filters when looking for AEP to PSS flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How do I earn miles on a Buenos Aires (AEP-Aeroparque Jorge Newbery) to Posadas (PSS-Libertador General Jose de San Martin) flight with Expedia?
It's easy to earn miles on a Buenos Aires (AEP-Aeroparque Jorge Newbery) to Posadas (PSS-Libertador General Jose de San Martin) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Posadas from Aeroparque Jorge Newbery (AEP)?
If you're planning to travel to Posadas from Aeroparque Jorge Newbery (AEP), you can fly typically into Libertador General Jose de San Martin (PSS) Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Buenos Aires (AEP-Aeroparque Jorge Newbery) to Posadas (PSS-Libertador General Jose de San Martin) at the last minute?
Typically, booking a last minute flight from Buenos Aires (AEP-Aeroparque Jorge Newbery) to Posadas (PSS-Libertador General Jose de San Martin) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Buenos Aires (AEP-Aeroparque Jorge Newbery) to Posadas (PSS-Libertador General Jose de San Martin) flight and hotel package?
Securing a Buenos Aires (AEP-Aeroparque Jorge Newbery) to Posadas (PSS-Libertador General Jose de San Martin) 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. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Buenos Aires (AEP-Aeroparque Jorge Newbery) to Posadas (PSS-Libertador General Jose de San Martin)?
If you booked your Buenos Aires (AEP-Aeroparque Jorge Newbery) to Posadas (PSS-Libertador General Jose de San Martin) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Aeroparque Jorge Newbery
Destination airport
Libertador General Jose de San Martin
Airlines serving
Aerolineas Argentinas
Roundtrip price
$220
Distance
515 mi
Average flight time
1 hour 36 mins

Book with confidence

Buenos Aires to Posadas Flights

The cheapest times to fly from Buenos Aires to Posadas

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

 

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

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

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 Posadas in 2026. You can also book with separate airlines for your outbound and return journeys, from $126 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 Posadas 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 Posadas 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 Posadas Flights

*Flight schedules are subject to change.

Explore a world of travel with Expedia

*Available to One Key members.