$283 Cheap Flights from Washington (IAD) to Buenos Aires (AEP)

View $283 flight on Thu, Mar 5, 2026Opens in a new window

Popular airlines from Washington Dulles Intl. Airport (IAD) to Buenos Aires (AEP-Aeroparque Jorge Newbery)

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Find available prices by choosing your travel dates.

Cheap Flights from Washington to Buenos Aires (IAD-AEP)

Prices were available within the past 7 days and start at $283 for one-way flights and $655 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Thu, May 1 - Thu, May 8
IAD
Washington
AEP
Buenos Aires
$655 Roundtrip, found 1 hour ago
$655
Roundtrip
found 1 hour ago
Select Delta flight, departing Thu, May 1 from Washington to Buenos Aires, returning Thu, May 8, priced at $655 found 1 hour ago
avianca
Mon, Sep 1 - Wed, Sep 10
IAD
Washington
AEP
Buenos Aires
$661 Roundtrip, found 9 hours ago
$661
Roundtrip
found 9 hours ago
Select avianca flight, departing Mon, Sep 1 from Washington to Buenos Aires, returning Wed, Sep 10, priced at $661 found 9 hours ago
Delta
Mon, Mar 2 - Sat, Mar 7
IAD
Washington
AEP
Buenos Aires
$662 Roundtrip, found 2 days ago
$662
Roundtrip
found 2 days ago
Select Delta flight, departing Mon, Mar 2 from Washington to Buenos Aires, returning Sat, Mar 7, priced at $662 found 2 days ago
avianca
Thu, Aug 21 - Wed, Sep 10
IAD
Washington
AEP
Buenos Aires
$668 Roundtrip, found 3 days ago
$668
Roundtrip
found 3 days ago
Select avianca flight, departing Thu, Aug 21 from Washington to Buenos Aires, returning Wed, Sep 10, priced at $668 found 3 days ago
avianca
Thu, Sep 4 - Mon, Sep 8
IAD
Washington
AEP
Buenos Aires
$672 Roundtrip, found 5 hours ago
$672
Roundtrip
found 5 hours ago
Select avianca flight, departing Thu, Sep 4 from Washington to Buenos Aires, returning Mon, Sep 8, priced at $672 found 5 hours ago
avianca
Tue, Sep 16 - Mon, Sep 29
IAD
Washington
AEP
Buenos Aires
$675 Roundtrip, found 13 hours ago
$675
Roundtrip
found 13 hours ago
Select avianca flight, departing Tue, Sep 16 from Washington to Buenos Aires, returning Mon, Sep 29, priced at $675 found 13 hours ago
avianca
Wed, Oct 1 - Fri, Oct 10
IAD
Washington
AEP
Buenos Aires
$679 Roundtrip, found 6 hours ago
$679
Roundtrip
found 6 hours ago
Select avianca flight, departing Wed, Oct 1 from Washington to Buenos Aires, returning Fri, Oct 10, priced at $679 found 6 hours ago
United
Thu, Sep 11 - Sun, Sep 21
IAD
Washington
AEP
Buenos Aires
$726 Roundtrip, found 2 days ago
$726
Roundtrip
found 2 days ago
Select United flight, departing Thu, Sep 11 from Washington to Buenos Aires, returning Sun, Sep 21, priced at $726 found 2 days ago
LATAM Airlines Group
Sat, Mar 7 - Sat, Mar 14
IAD
Washington
AEP
Buenos Aires
$765 Roundtrip, just found
$765
Roundtrip
just found
Select LATAM Airlines Group flight, departing Sat, Mar 7 from Washington to Buenos Aires, returning Sat, Mar 14, priced at $765 just found
Air Canada
Thu, Oct 30 - Sun, Nov 9
IAD
Washington
AEP
Buenos Aires
$1,382 Roundtrip, found 6 days ago
$1,382
Roundtrip
found 6 days ago
Select Air Canada flight, departing Thu, Oct 30 from Washington to Buenos Aires, returning Sun, Nov 9, priced at $1,382 found 6 days ago
Flights from Washington (IAD) to Buenos Aires (AEP)
Origin airport
Washington Dulles Intl.
Destination airport
Aeroparque Jorge Newbery
Airlines serving
Air Canada, Delta, LATAM Airlines Group, avianca
Roundtrip price
$655
Distance
5222 mi

Washington to Buenos Aires Flights

The cheapest times to fly from Washington 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 Washington to Buenos Aires are during the month of May. You can find some of the cheapest flights from Washington to Buenos Aires with Expedia's search tool and vast selection of airlines.

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

Sunday is one of the best days to book for cheap flights from Washington 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 Washington 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 Washington to Buenos Aires in 2025. You can also book with separate airlines for your outbound and return journeys, from $283 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 Washington 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 Washington 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 Washington Dulles Intl. Airport (IAD) to Aeroparque Jorge Newbery Airport (AEP) cost?
Discover the latest flight deals from IAD to AEP by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from IAD to AEP?
The cheapest flights from IAD 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.
What is the cheapest airline that flies from IAD to AEP?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that’ll take you from IAD to AEP. Sort your results by “Price (lowest to highest)” to snap up a great deal.
How many flights per day from Washington Dulles Intl. Airport (IAD) to Aeroparque Jorge Newbery Airport (AEP)?
You’ll need to catch a flight with a layover when traveling from Washington Dulles Intl. Airport (IAD) to Aeroparque Jorge Newbery Airport (AEP). There are no daily direct flights on this route. However, just filter your search to include one or more stops to find an option that works for you.
What day of the week has the most flights from IAD to AEP?
Friday is typically the busiest day for flights, while Tuesday is often the quietest.* Remember that flight schedules can vary depending on a number of factors, including the season and airline.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Washington Dulles Intl. Airport (IAD) to Aeroparque Jorge Newbery Airport (AEP)?
Select a flight from Washington Dulles Intl. Airport (IAD) to Aeroparque Jorge Newbery Airport (AEP) that leaves before 3 PM to reduce the likelihood of delays. Later departures are on average 22% more likely to be canceled.**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 Washington Dulles Intl. Airport (IAD) to Aeroparque Jorge Newbery Airport (AEP) last-minute?
Last-minute bookings from IAD to AEP are typically more expensive. For the lowest prices, start looking for flights well in advance. That being said, if you’re flexible with your travel plans, it’s possible to find a cheap fare just before your departure.
Is it cheaper to book an IAD to AEP flight and hotel package?
Compared with arranging flights and hotels separately, booking an IAD to AEP flight and hotel package with Expedia could lead to significant savings. What’s more, having everything in one easy place will take the stress out of planning your trip. Simply pick your flights and select from our wide range of stays, then customize your trip with extras like activities, tours and car rentals.
Can I cancel or change the date of my flight from Washington Dulles Intl. Airport (IAD) to Aeroparque Jorge Newbery Airport (AEP)?
If you reserved your IAD to AEP flight in the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of fare you have, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal for further details.

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*Available to One Key members.