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Buenos Aires

$251+ Cheap flights from Dulles Intl (IAD) to Buenos Aires (BUE)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/4. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — BUE
Apr 23 — Apr 301
Thu 4/23
Thu 4/30
1 adult, Economy
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Cheap flight deals from Dulles Intl to Buenos Aires

Cheapest flights from Dulles Intl to Buenos Aires
Explore the most affordable flight options available from Dulles Intl to Buenos Aires. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 24, 2026.

This Ticket deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/136:50 am
IAD
-
EZE
1 stop21h 50m
Avianca
Sun 4/264:50 pm
EZE
-
IAD
1 stop22h 25m
Avianca
Deal found 3/22$572
This Avianca deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/76:50 am
IAD
-
EZE
1 stop21h 50m
Avianca
Thu 5/144:50 pm
EZE
-
IAD
1 stop13h 30m
Avianca
Deal found 3/23$583
This Avianca deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/123:35 pm
IAD
-
EZE
1 stop13h 05m
Avianca
Fri 4/244:50 pm
EZE
-
IAD
1 stop13h 30m
Avianca
Deal found 3/23$586
This Avianca deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/166:50 am
IAD
-
EZE
1 stop21h 50m
Avianca
Thu 4/234:50 pm
EZE
-
IAD
1 stop13h 30m
Avianca
Deal found 3/22$587
This Avianca deal was found by Cheapflights users on 3/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/296:50 am
IAD
-
EZE
1 stop21h 50m
Avianca
Thu 5/77:10 am
EZE
-
IAD
2 stops20h 35m
Avianca
Deal found 3/24$588
This Avianca deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/126:50 am
IAD
-
EZE
1 stop16h 35m
Avianca
Sun 4/264:50 pm
EZE
-
IAD
1 stop13h 30m
Avianca
Deal found 3/23$590
This American Airlines deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/510:32 am
IAD
-
EZE
2 stops23h 33m
American Airlines
Tue 5/268:35 pm
EZE
-
IAD
2 stops23h 58m
American Airlines
Deal found 3/22$601
This Avianca deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/73:35 pm
IAD
-
AEP
1 stop13h 05m
Avianca
Thu 5/147:00 am
AEP
-
IAD
2 stops20h 45m
Avianca
Deal found 3/23$604
This American Airlines deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/143:26 pm
IAD
-
EZE
2 stops18h 39m
American Airlines
Mon 5/2510:05 pm
EZE
-
IAD
1 stop25h 42m
American Airlines
Deal found 3/22$605
This oojo deal was found by Cheapflights users on 3/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/283:35 pm
IAD
-
EZE
1 stop13h 05m
Avianca
Thu 5/74:50 pm
EZE
-
IAD
1 stop13h 30m
Avianca
Deal found 3/21$607
This Avianca deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/263:35 pm
IAD
-
AEP
1 stop13h 05m
Avianca
Mon 5/187:00 am
AEP
-
IAD
2 stops20h 45m
Avianca
Deal found 3/20$608
This Justfly.com deal was found by Cheapflights users on 3/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/13:35 pm
IAD
-
AEP
1 stop13h 05m
Avianca
Sun 5/177:00 am
AEP
-
IAD
1 stop23h 20m
Avianca
Deal found 3/21$629

Find flight deals from Dulles Intl to Buenos Aires

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to Buenos Aires (BUE). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated March 24, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$572
(Ticket)

One-way from

$251
(Avianca)

Popular in

December

Cheapest in

September

Average price

$795
Provider with most accurate pricing for Washington, D.C. Dulles Intl-Buenos Aires (BUE) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-Buenos Aires (BUE) flights.
Search Deals
From Washington, D.C. Dulles Intl to Buenos Aires (BUE)
Search Deals
One-way flight from Washington, D.C. Dulles Intl to Buenos Aires (BUE)
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($109 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($38 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl to Buenos Aires that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 24, 2026.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Buenos Aires that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Mon 6/1

10:20 pm-8:00 am

1 stop32h 40m

Buenos Aires Ministro Pistarini

Fri 7/31

9:00 pm-6:50 pm

1 stop22h 50m

$609

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Fri 9/4

9:35 am-4:20 am

1 stop17h 45m

Buenos Aires Ministro Pistarini

Fri 9/11

9:02 am-4:20 am

1 stop20h 18m

$609

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Wed 4/29

12:55 pm-8:00 am

1 stop18h 05m

Buenos Aires Ministro Pistarini

Wed 5/6

9:00 pm-10:49 pm

1 stop26h 49m

$609

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Tue 5/26

2:53 pm-8:00 am

1 stop16h 07m

Buenos Aires Ministro Pistarini

Tue 6/2

9:00 pm-6:50 pm

1 stop22h 50m

$619

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Mon 5/4

6:00 am-8:00 am

1 stop25h 00m

Buenos Aires Ministro Pistarini

Wed 8/12

9:00 pm-11:28 am

1 stop15h 28m

$619

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Thu 5/28

12:50 pm-8:00 am

1 stop18h 10m

Buenos Aires Ministro Pistarini

Mon 6/1

9:00 pm-8:46 pm

1 stop24h 46m

$619

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Wed 9/2

6:30 am-8:00 am

1 stop24h 30m

Buenos Aires Ministro Pistarini

Thu 9/17

9:00 pm-6:57 pm

1 stop22h 57m

$637

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Wed 9/2

5:30 pm-9:20 am

2 stops14h 50m

Buenos Aires Ministro Pistarini

Wed 9/16

8:10 pm-2:44 pm

1 stop19h 34m

$641

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Wed 9/2

5:30 pm-9:20 am

2 stops14h 50m

Buenos Aires Ministro Pistarini

Mon 9/14

7:35 am-12:10 am

2 stops17h 35m

$641

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Fri 6/12

6:25 am-4:15 am

1 stop20h 50m

Buenos Aires Ministro Pistarini

Tue 6/23

2:49 pm-4:21 am

1 stop14h 32m

$645

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/19

Showing 1-10 of 48 resultsSorted by cheapest first
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Compare providers for flights from Dulles Intl to Buenos Aires

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Dulles Intl to Buenos Aires in March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 stars
OvagoPrice Accuracy2 starsTrust Score*3 stars
Justfly.comPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Buenos Aires flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Washington, D.C. Dulles Intl Airport-Buenos Aires flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C. Dulles Intl Airport-Buenos Aires flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Buenos Aires flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Washington, D.C. Dulles Intl Airport-Buenos Aires flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Dulles Intl to Buenos Aires

Have a flexible travel schedule? Discover the best time to fly to Buenos Aires from Dulles Intl with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. Dulles Intl Airport to Buenos Aires

How far ahead should I book a flight from Washington, D.C. Dulles Intl Airport to Buenos Aires?

Use this chart to determine the optimal time to book a round-trip flight from Dulles Intl to Buenos Aires. Price data was last updated on March 13, 2026.

Booking 37 days in advance of your planned departure date is, on average, the best time to get cheap flights from Washington, D.C. Dulles Intl Airport to Buenos Aires. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to Buenos Aires?

Currently, February is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Buenos Aires (average of $314). Flying from Washington, D.C. Dulles Intl Airport to Buenos Aires in December is currently the most expensive (average of $646). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What’s the top layover airport for flights from Washington, D.C. Dulles Intl Airport to Buenos Aires?

Share of 1-stop round-trip flights from Washington, D.C. Dulles Intl Airport to Buenos Aires chosen by Cheapflights users in the past 12 months, using the same layover each way.

Panama City (PTY) – chosen by Cheapflights users on 33% of 1-stop itineraries from Washington, D.C. Dulles Intl Airport to Buenos Aires on Cheapflights.

What’s the cheapest layover airport for flights from Washington, D.C. Dulles Intl Airport to Buenos Aires?

Average round-trip fare for 1-stop flights from Washington, D.C. Dulles Intl Airport to Buenos Aires, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Panama City (PTY) is the most affordable 1-stop option, with an average round-trip price of $608.

What’s the fastest layover option from Washington, D.C. Dulles Intl Airport to Buenos Aires?

Shortest average travel time for 1-stop one-way flights from Washington, D.C. Dulles Intl Airport to Buenos Aires, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Bogotá (BOG) have the shortest average one-way travel time for 1-stop routes: 13h 45m.

Which airport typically offers the quickest layover for flights from Washington, D.C. Dulles Intl Airport to Buenos Aires?

Average layover duration for 1-stop one-way flights from Washington, D.C. Dulles Intl Airport to Buenos Aires, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Bogotá (BOG) offer the fastest connection on this route, with an average layover time of 1h 36m.

Reviews of airlines servicing Buenos Aires

Get insights into the airlines that provide service to Buenos Aires. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Buenos Aires. Reviews last updated March 24, 2026.
Read through reviews of airlines operating flights from Washington, D.C. Dulles Intl Airport to Buenos Aires, such as Delta,Copa Airlines, andLATAM Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,324 reviews

Crew

8.5

Food

7.2

Entertainment

7.8

Comfort

7.9

Boarding

8.1

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,324 reviews
Delta
7.9
Good
8,324 reviews

Crew

8.5

Food

7.2

Entertainment

7.8

Comfort

7.9

Boarding

8.1

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Copa Airlines
7.5
Good
1,577 reviews
Delta
7.9
Good
8,324 reviews

Crew

8.5

Food

7.2

Entertainment

7.8

Comfort

7.9

Boarding

8.1

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
LATAM Airlines
7.4
Good
1,908 reviews
Delta
7.9
Good
8,324 reviews

Crew

8.5

Food

7.2

Entertainment

7.8

Comfort

7.9

Boarding

8.1

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,474 reviews
Delta
7.9
Good
8,324 reviews

Crew

8.5

Food

7.2

Entertainment

7.8

Comfort

7.9

Boarding

8.1

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Avianca
6.5
Okay
2,505 reviews
Delta
7.9
Good
8,324 reviews

Crew

8.5

Food

7.2

Entertainment

7.8

Comfort

7.9

Boarding

8.1

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to Buenos Aires. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Washington, D.C. Dulles Intl Airport to Buenos Aires?

    For as low as $609, United Airlines can have you in Buenos Aires from Washington, D.C. Dulles Intl Airport in 17h 45m. The distance between Washington, D.C. Dulles Intl Airport and Buenos Aires is about 5235 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from Washington, D.C. Dulles Intl Airport to Buenos Aires round-trip?

    Delta, at $274, was found to be the cheapest airline from Washington, D.C. Dulles Intl Airport to Buenos Aires.Alternate airlines to your destination round-trip include Copa Airlines and Avianca. Delta is 65% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from Washington, D.C. Dulles Intl Airport to Buenos Aires one-way?

    The cheapest airlines for a one-way flight from Washington, D.C. Dulles Intl Airport to Buenos Aires are Avianca ($258), Delta ($260), and Copa Airlines ($266).

  • Can I find deals for flights from Dulles Intl to Buenos Aires that include hotel bookings?

    Yes. In addition to deals on Dulles Intl to Buenos Aires flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Dulles Intl to Buenos Aires?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Dulles Intl to Buenos Aires.

  • Can I find deals for business class flights from Dulles Intl to Buenos Aires?

    Yes. Cheapflights offers flight deals from Dulles Intl to Buenos Aires by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to Buenos Aires?

    Currently, February is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Buenos Aires (average of $314). Flying from Washington, D.C. Dulles Intl Airport to Buenos Aires in December is currently the most expensive (average of $646). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Dulles Intl to Buenos Aires

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from Dulles Intl to Buenos Aires

Discover the top 5 airlines that operate flights from Dulles Intl to Buenos Aires. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 24, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$274Average$880FlexibilityNo cancel feeOn-timeN/A
Copa AirlinesCheapest$355Average$786FlexibilityNo cancel feeOn-time70%
AviancaCheapest$586Average$815FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$620Average$639FlexibilityNo cancel feeOn-time69%
LATAM AirlinesCheapest$635Average$702FlexibilityNo cancel feeOn-time81%

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