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$275+ 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 2/16. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — BUE
Jan 10 — Jan 171
Sat 1/10
Sat 1/17
1 adult, Economy
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Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to Buenos Aires are usually found in October or September, booked 37 days in advance, depart on a Monday or Tuesday and return on a Thursday

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 December 11, 2025.

This United Airlines deal was found by Cheapflights users on 12/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/1312:45 pmIAD - EZE
1 stop18h 35mUnited Airlines
Tue 12/2311:55 pmEZE - IAD
1 stop18h 29mUnited Airlines
Deal found 12/10$640
This Copa Airlines deal was found by Cheapflights users on 12/10. 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 Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/133:32 pmIAD - EZE
1 stop14h 27mCopa Airlines
Tue 12/235:16 amEZE - IAD
1 stop20h 17mCopa Airlines
Deal found 12/10$663
This CheapOair deal was found by Cheapflights users on 12/9. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/105:59 pmIAD - EZE
1 stop13h 01mLATAM Airlines
Thu 12/188:55 pmEZE - IAD
1 stop14h 16mLATAM Airlines
Deal found 12/9$686
This LATAM Airlines deal was found by Cheapflights users on 12/10. 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 LATAM Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/1110:08 amIAD - EZE
1 stop19h 12mLATAM Airlines
Tue 12/168:55 pmEZE - IAD
1 stop19h 45mLATAM Airlines
Deal found 12/10$689
This American Airlines deal was found by Cheapflights users on 12/10. 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 12/116:00 amIAD - EZE
1 stop24h 05mAmerican Airlines
Tue 12/168:30 pmEZE - IAD
2 stops19h 04mAmerican Airlines
Deal found 12/10$715
This LATAM Airlines deal was found by Cheapflights users on 12/10. 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 LATAM Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/2710:51 amIAD - EZE
1 stop18h 29mDelta
Sat 2/2111:55 pmEZE - IAD
1 stop13h 40mDelta
Deal found 12/10$739
This American Airlines deal was found by Cheapflights users on 12/9. 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.
Wed 12/107:55 amIAD - EZE
2 stops23h 15mAmerican Airlines
Thu 12/1810:10 amEZE - IAD
2 stops24h 32mAmerican Airlines
Deal found 12/9$746
This FlightHub deal was found by Cheapflights users on 12/10. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/274:55 pmIAD - EZE
1 stop15h 20mLATAM Airlines
Sat 2/2111:00 amEZE - IAD
2 stops26h 41mLATAM Airlines
Deal found 12/10$756
This CheapOair deal was found by Cheapflights users on 12/10. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/1410:08 amIAD - EZE
1 stop20h 52mLATAM Airlines
Tue 12/167:43 pmEZE - IAD
2 stops24h 38mLATAM Airlines
Deal found 12/10$761
This CheapOair deal was found by Cheapflights users on 12/9. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/137:59 pmIAD - EZE
1 stop36h 16mLATAM Airlines
Mon 12/157:43 pmEZE - IAD
2 stops17h 52mLATAM Airlines
Deal found 12/9$767
This Delta deal was found by Cheapflights users on 12/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/236:00 amIAD - EZE
1 stop23h 20mDelta
Sun 12/288:55 pmEZE - IAD
1 stop14h 51mDelta
Deal found 12/9$789
This KAYAK deal was found by Cheapflights users on 12/10. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/1312:30 pmIAD - AEP
2 stops19h 10mLATAM Airlines
Tue 12/236:20 pmAEP - IAD
2 stops19h 53mLATAM Airlines
Deal found 12/10$890

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 December 11, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$640
(KAYAK)

One-way from

$275
(Delta)

Popular in

December

Cheapest in

October

Average price

$1,237
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. 13% potential increase in price ($124 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($37 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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 December 11, 2025.
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

Dulles Intl

Fly to

Buenos Aires

Route

Depart

Return

Price

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Sun 4/26

5:25 pm-9:45 am

1 stop15h 20m

Buenos Aires Ministro Pistarini

Mon 5/11

7:45 am-12:09 am

2 stops17h 24m

$640

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Sat 4/25

1:00 pm-9:45 am

1 stop19h 45m

Buenos Aires Ministro Pistarini

Thu 5/14

7:45 am-12:09 am

2 stops17h 24m

$640

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Tue 3/3

12:23 pm-10:15 am

1 stop19h 52m

Buenos Aires Ministro Pistarini

Wed 3/11

8:00 am-12:26 am

2 stops17h 26m

$640

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Sun 5/17

6:00 am-9:45 am

1 stop26h 45m

Buenos Aires Ministro Pistarini

Tue 5/26

8:10 pm-12:01 pm

1 stop16h 51m

$642

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Sat 4/25

5:25 pm-9:45 am

1 stop15h 20m

Buenos Aires Ministro Pistarini

Sun 5/10

8:10 pm-12:09 am

1 stop28h 59m

$647

Washington, D.C.Buenos Aires

IAD - AEP

IADAEP

Washington, D.C. Dulles Intl

Fri 5/15

7:00 am-5:40 am

1 stop21h 40m

Buenos Aires Jorge Newbery

Sun 5/24

7:00 am-5:35 am

1 stop23h 35m

$655

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Fri 4/3

9:32 am-4:30 am

1 stop17h 58m

Buenos Aires Ministro Pistarini

Thu 4/30

2:57 pm-4:22 am

1 stop14h 25m

$663

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Sat 3/21

2:18 am-1:57 am

1 stop22h 39m

Buenos Aires Ministro Pistarini

Tue 3/31

2:52 pm-4:13 am

1 stop14h 21m

$663

Washington, D.C.Buenos Aires

IAD - AEP

IADAEP

Washington, D.C. Dulles Intl

Fri 5/15

7:00 am-5:40 am

1 stop21h 40m

Buenos Aires Jorge Newbery

Sat 5/23

7:00 am-5:35 am

1 stop23h 35m

$673

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Sat 2/28

5:25 pm-9:00 am

1 stop13h 35m

Buenos Aires Ministro Pistarini

Thu 3/12

8:55 pm-11:51 am

1 stop15h 56m

$689

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/8

Showing 1-10 of 44 results
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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 December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*2 stars
Justfly.comPrice Accuracy3 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star

*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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Washington, D.C. Dulles Intl Airport-Buenos Aires flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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 December 5, 2025.

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, July is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Buenos Aires (average of $330). Flying from Washington, D.C. Dulles Intl Airport to Buenos Aires in June is currently the most expensive (average of $801). 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 is the cheapest time of day to fly from IAD to BUE?

Find hourly flight availability from Dulles Intl to Buenos Aires. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 11, 2025.

It’s optimal to fly from Washington, D.C. Dulles Intl Airport to Buenos Aires in the evening. By choosing this option you can save up to 30% on the cost of your flight, compared to a flight in the afternoon.

What is the cheapest day to fly from Washington, D.C. Dulles Intl Airport to Buenos Aires?

Use this chart to determine the cheapest time to fly round-trip from Dulles Intl to Buenos Aires. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Washington, D.C. Dulles Intl Airport to Buenos Aires flight should consider departing on Wednesday evenings when fares are most often at their lowest. Wednesday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

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.

Mexico City (MEX) – chosen by Cheapflights users on 25% 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.

Mexico City (MEX) is the most affordable 1-stop option, with an average round-trip price of $782.

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 December 11, 2025.
Read through reviews of airlines operating flights from Washington, D.C. Dulles Intl Airport to Buenos Aires, such as Delta, Copa Airlines, and LATAM Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,006 reviews

Crew

8.5

Boarding

8.1

Entertainment

7.9

Comfort

7.9

Overall

7.9

Food

7.3

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
8,006 reviews
Delta
7.9
Good
8,006 reviews

Crew

8.5

Boarding

8.1

Entertainment

7.9

Comfort

7.9

Overall

7.9

Food

7.3

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
7.6
Good
1,557 reviews
Delta
7.9
Good
8,006 reviews

Crew

8.5

Boarding

8.1

Entertainment

7.9

Comfort

7.9

Overall

7.9

Food

7.3

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
7.5
Good
1,889 reviews
Delta
7.9
Good
8,006 reviews

Crew

8.5

Boarding

8.1

Entertainment

7.9

Comfort

7.9

Overall

7.9

Food

7.3

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
9,092 reviews
Delta
7.9
Good
8,006 reviews

Crew

8.5

Boarding

8.1

Entertainment

7.9

Comfort

7.9

Overall

7.9

Food

7.3

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
6.6
Okay
2,478 reviews
Delta
7.9
Good
8,006 reviews

Crew

8.5

Boarding

8.1

Entertainment

7.9

Comfort

7.9

Overall

7.9

Food

7.3

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 $640, Delta can have you in Buenos Aires from Washington, D.C. Dulles Intl Airport in 15h 20m. 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 $344, 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 Avianca and Copa Airlines. Delta is 58% 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 Delta ($270), Avianca ($270), and Copa Airlines ($276).

  • 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, July is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Buenos Aires (average of $330). Flying from Washington, D.C. Dulles Intl Airport to Buenos Aires in June is currently the most expensive (average of $801). 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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Dulles Intl to Salta flights

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 December 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$514Average$988FlexibilityNo cancel feeOn-timeN/A
AviancaCheapest$600Average$820FlexibilityNo cancel feeOn-time71%
Copa AirlinesCheapest$617Average$830FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$629Average$672FlexibilityNo cancel feeOn-time69%
LATAM AirlinesCheapest$637Average$839FlexibilityNo cancel feeOn-time81%

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