HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Buenos Aires

$315+ 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 11/10. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — BUE
Jul 8 — Jul 151
Wed 7/8
Wed 7/15
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Dulles Intl to Buenos Aires with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 June 8, 2026.

This Justfly.com deal was found by Cheapflights users on 6/7. 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.
Thu 7/212:29 pm
IAD
-
EZE
2 stops20h 11m
LATAM Airlines
Sun 7/128:10 pm
EZE
-
IAD
1 stop23h 20m
LATAM Airlines
Deal found 6/7$646
This Copa Airlines deal was found by Cheapflights users on 6/8. 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.
Wed 7/84:26 pm
IAD
-
EZE
1 stop29h 01m
Copa Airlines
Thu 7/162:49 pm
EZE
-
IAD
1 stop14h 32m
Copa Airlines
Deal found 6/8$655
This FlightHub deal was found by Cheapflights users on 6/6. 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.
Wed 10/74:00 pm
IAD
-
EZE
2 stops16h 40m
LATAM Airlines
Wed 10/141:10 pm
EZE
-
IAD
2 stops23h 49m
LATAM Airlines
Deal found 6/6$659
This American Airlines deal was found by Cheapflights users on 6/6. 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 7/71:08 pm
IAD
-
EZE
2 stops18h 42m
American Airlines
Mon 7/1310:35 pm
EZE
-
IAD
2 stops21h 02m
American Airlines
Deal found 6/6$661
This KAYAK deal was found by Cheapflights users on 6/6. 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.
Tue 8/1812:57 pm
IAD
-
EZE
1 stop18h 03m
Multiple Airlines
Thu 9/39:00 pm
EZE
-
IAD
1 stop22h 59m
Multiple Airlines
Deal found 6/6$666
This LATAM Airlines deal was found by Cheapflights users on 6/6. 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.
Sun 8/165:42 pm
IAD
-
AEP
2 stops20h 08m
LATAM Airlines
Thu 8/275:35 pm
AEP
-
IAD
2 stops25h 53m
LATAM Airlines
Deal found 6/6$667
This United Airlines deal was found by Cheapflights users on 6/8. 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.
Wed 7/16:30 am
IAD
-
EZE
1 stop24h 30m
United Airlines
Thu 7/99:00 pm
EZE
-
IAD
1 stop15h 28m
United Airlines
Deal found 6/8$667
This Delta deal was found by Cheapflights users on 6/3. 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.
Thu 7/210:16 am
IAD
-
EZE
2 stops22h 24m
Delta
Tue 7/78:10 pm
EZE
-
IAD
1 stop18h 51m
Delta
Deal found 6/3$671
This United Airlines deal was found by Cheapflights users on 6/5. 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.
Tue 6/1610:20 pm
IAD
-
EZE
1 stop32h 40m
United Airlines
Sun 6/219:00 pm
EZE
-
IAD
1 stop28h 31m
United Airlines
Deal found 6/5$672
This LATAM Airlines deal was found by Cheapflights users on 6/7. 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.
Sun 6/215:51 pm
IAD
-
EZE
1 stop14h 54m
LATAM Airlines
Fri 6/268:10 pm
EZE
-
IAD
1 stop24h 48m
LATAM Airlines
Deal found 6/7$674
This KAYAK deal was found by Cheapflights users on 6/6. 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 9/510:29 pm
IAD
-
EZE
1 stop32h 31m
Multiple Airlines
Thu 9/179:00 pm
EZE
-
IAD
1 stop15h 28m
Multiple Airlines
Deal found 6/6$675
This United Airlines deal was found by Cheapflights users on 6/7. 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 9/510:29 pm
IAD
-
EZE
1 stop32h 31m
United Airlines
Wed 9/169:00 pm
EZE
-
IAD
1 stop22h 59m
United Airlines
Deal found 6/7$676

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 June 8, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$646
(Justfly.com)

One-way from

$315
(Delta)

Popular in

December

Cheapest in

September

Average price

$709
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 ($113 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 June 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 June 8, 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

Wed 7/8

6:25 am-4:30 am

1 stop21h 05m

Buenos Aires Ministro Pistarini

Tue 7/14

2:17 am-4:21 am

1 stop27h 04m

$655

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Tue 7/7

2:22 am-11:40 pm

1 stop20h 18m

Buenos Aires Ministro Pistarini

Tue 7/14

2:49 pm-4:21 am

1 stop14h 32m

$655

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Tue 7/7

2:22 am-11:40 pm

1 stop20h 18m

Buenos Aires Ministro Pistarini

Wed 7/15

3:48 am-4:21 am

1 stop25h 33m

$655

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Wed 9/16

2:25 am-4:21 am

1 stop24h 56m

Buenos Aires Ministro Pistarini

Mon 9/28

8:59 am-4:20 am

1 stop20h 21m

$655

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Mon 7/6

6:20 am-8:00 am

1 stop24h 40m

Buenos Aires Ministro Pistarini

Mon 7/13

9:00 pm-11:33 am

1 stop15h 33m

$667

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Sun 7/5

12:38 pm-9:45 am

1 stop20h 07m

Buenos Aires Ministro Pistarini

Sat 7/11

8:10 pm-9:26 am

1 stop14h 16m

$667

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Sun 8/30

8:31 am-8:00 am

1 stop22h 29m

Buenos Aires Ministro Pistarini

Wed 9/2

9:00 pm-11:28 am

1 stop15h 28m

$667

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Wed 7/1

8:40 am-8:00 am

1 stop22h 20m

Buenos Aires Ministro Pistarini

Thu 7/9

9:00 pm-11:28 am

1 stop15h 28m

$667

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Mon 7/6

7:39 pm-6:50 pm

2 stops22h 11m

Buenos Aires Ministro Pistarini

Mon 7/13

10:40 pm-6:19 pm

2 stops20h 39m

$671

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Sun 9/27

6:15 am-8:00 am

1 stop24h 45m

Buenos Aires Ministro Pistarini

Wed 9/30

9:00 pm-10:30 pm

1 stop26h 30m

$676

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/3

Showing 1-10 of 46 resultsSorted by cheapest first
1
2
3
...
5

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 June.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 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

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

Currently, April is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Buenos Aires (average of $229). Flying from Washington, D.C. Dulles Intl Airport to Buenos Aires in May is currently the most expensive (average of $581). 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.

How much does it cost to fly round-trip from Washington, D.C. Dulles Intl Airport to Buenos Aires?

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 50% 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.

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

Booking 21 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.

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 June 8, 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
8,395 reviews

Boarding

8.1

Comfort

7.8

Entertainment

7.8

Food

7.2

Overall

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
Delta
7.9
Good
8,395 reviews
Delta
7.9
Good
8,395 reviews

Boarding

8.1

Comfort

7.8

Entertainment

7.8

Food

7.2

Overall

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
Copa Airlines
7.5
Good
1,568 reviews
Delta
7.9
Good
8,395 reviews

Boarding

8.1

Comfort

7.8

Entertainment

7.8

Food

7.2

Overall

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
LATAM Airlines
7.4
Good
1,925 reviews
Delta
7.9
Good
8,395 reviews

Boarding

8.1

Comfort

7.8

Entertainment

7.8

Food

7.2

Overall

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
United Airlines
7.4
Good
9,783 reviews
Delta
7.9
Good
8,395 reviews

Boarding

8.1

Comfort

7.8

Entertainment

7.8

Food

7.2

Overall

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
Avianca
6.5
Okay
2,531 reviews
Delta
7.9
Good
8,395 reviews

Boarding

8.1

Comfort

7.8

Entertainment

7.8

Food

7.2

Overall

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional

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 $661, LATAM Airlines can have you in Buenos Aires from Washington, D.C. Dulles Intl Airport in 18h 42m. 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 64% cheaper than the average price of flights available within the next 90 days to this destination.

  • 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, April is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Buenos Aires (average of $229). Flying from Washington, D.C. Dulles Intl Airport to Buenos Aires in May is currently the most expensive (average of $581). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Dulles Intl to Buenos Aires

See prices for flight routes from nearby airports that may be better suited for you.
Dulles Intl to Jorge Newbery flights
Dulles Intl to Mendoza flights
Dulles Intl to Ushuaia flights
Dulles Intl to Mar del Plata flights
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 June 8, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$274Average$890FlexibilityNo cancel feeOn-timeN/A
Copa AirlinesCheapest$355Average$785FlexibilityNo cancel feeOn-time70%
AviancaCheapest$536Average$750FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$620Average$639FlexibilityNo cancel feeOn-time69%
LATAM AirlinesCheapest$635Average$741FlexibilityNo cancel feeOn-time81%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.