$280 Cheap Flights from Washington (IAD) to Buenos Aires (AEP)

View $280 flight on Fri, Sep 11, 2026Opens in a new window

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

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

Prices were available within the past 7 days and start at $280 for one-way flights and $650 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Fri, Sep 11 - Mon, Sep 14
IAD
Washington
AEP
Buenos Aires
$650 Roundtrip, found 7 hours ago
$650
Roundtrip
found 7 hours ago
Select Delta flight, departing Fri, Sep 11 from Washington to Buenos Aires, returning Mon, Sep 14, priced at $650 found 7 hours ago
LATAM Airlines Group
Tue, Dec 2 - Tue, Dec 9
IAD
Washington
AEP
Buenos Aires
$670 Roundtrip, found 3 hours ago
$670
Roundtrip
found 3 hours ago
Select LATAM Airlines Group flight, departing Tue, Dec 2 from Washington to Buenos Aires, returning Tue, Dec 9, priced at $670 found 3 hours ago
LATAM Airlines Group
Sat, Nov 15 - Wed, Nov 19
IAD
Washington
AEP
Buenos Aires
$675 Roundtrip, found 2 days ago
$675
Roundtrip
found 2 days ago
Select LATAM Airlines Group flight, departing Sat, Nov 15 from Washington to Buenos Aires, returning Wed, Nov 19, priced at $675 found 2 days ago
LATAM Airlines Group
Sun, Sep 13 - Mon, Sep 21
IAD
Washington
AEP
Buenos Aires
$677 Roundtrip, found 5 days ago
$677
Roundtrip
found 5 days ago
Select LATAM Airlines Group flight, departing Sun, Sep 13 from Washington to Buenos Aires, returning Mon, Sep 21, priced at $677 found 5 days ago
avianca
Wed, Nov 19 - Wed, Nov 26
IAD
Washington
AEP
Buenos Aires
$685 Roundtrip, found 2 days ago
$685
Roundtrip
found 2 days ago
Select avianca flight, departing Wed, Nov 19 from Washington to Buenos Aires, returning Wed, Nov 26, priced at $685 found 2 days ago
avianca
Mon, Dec 8 - Tue, Dec 16
IAD
Washington
AEP
Buenos Aires
$690 Roundtrip, found 2 days ago
$690
Roundtrip
found 2 days ago
Select avianca flight, departing Mon, Dec 8 from Washington to Buenos Aires, returning Tue, Dec 16, priced at $690 found 2 days ago
LATAM Airlines Group
Mon, Dec 1 - Fri, Dec 5
IAD
Washington
AEP
Buenos Aires
$695 Roundtrip, found 11 hours ago
$695
Roundtrip
found 11 hours ago
Select LATAM Airlines Group flight, departing Mon, Dec 1 from Washington to Buenos Aires, returning Fri, Dec 5, priced at $695 found 11 hours ago
avianca
Wed, May 27 - Sun, May 31
IAD
Washington
AEP
Buenos Aires
$695 Roundtrip, found 9 hours ago
$695
Roundtrip
found 9 hours ago
Select avianca flight, departing Wed, May 27 from Washington to Buenos Aires, returning Sun, May 31, priced at $695 found 9 hours ago
avianca
Fri, Mar 13 - Mon, Mar 23
IAD
Washington
AEP
Buenos Aires
$702 Roundtrip, found 2 days ago
$702
Roundtrip
found 2 days ago
Select avianca flight, departing Fri, Mar 13 from Washington to Buenos Aires, returning Mon, Mar 23, priced at $702 found 2 days ago
Air Canada
Wed, Feb 18 - Tue, May 19
IAD
Washington
AEP
Buenos Aires
$1,504 Roundtrip, found 11 hours ago
$1,504
Roundtrip
found 11 hours ago
Select Air Canada flight, departing Wed, Feb 18 from Washington to Buenos Aires, returning Tue, May 19, priced at $1,504 found 11 hours ago

Alternative airports near Buenos Aires

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Ministro Pistarini Intl. EZE. Cheapest option available. Average driving time to city center is 25 minutes. Flights from $670
EZE
Ministro Pistarini Intl.
Cheapest
Average driving time to city center25 min
Flights from $670

Frequently asked questions

How much does a flight from Washington Dulles Intl. Airport (IAD) to Aeroparque Jorge Newbery Airport (AEP) cost?
Secure a cheap one-way flight from $280 or cheap return flight from $650 from Washington Dulles Intl. Airport (IAD) to Aeroparque Jorge Newbery Airport (AEP) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Washington Dulles Intl. Airport (IAD) to Aeroparque Jorge Newbery Airport (AEP)?
The cheapest month to fly from IAD to AEP is September, when demand is low. Off-peak season is typically when you'll find lower airfares between these airports.
What is the cheapest airline that flies from Washington Dulles Intl. Airport (IAD) to Aeroparque Jorge Newbery Airport (AEP)?
Use the filter tool on Expedia to compare different airlines and find the most affordable carrier that'll take you from IAD to AEP. Then, 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.

Travel information

Origin airport
Washington Dulles Intl.
Destination airport
Aeroparque Jorge Newbery
Airlines serving
Air Canada, LATAM Airlines Group, avianca
Roundtrip price
$649
Distance
5222 mi

Book with confidence

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 September. 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 $280 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.

 

Washington to Buenos Aires Flights

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*Available to One Key members.