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$297+ 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 9/14. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — BUE
Sep 6 — Sep 131
Sun 9/6
Sun 9/13
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 August 7, 2026.

This Kiwi.com deal was found by Cheapflights users on 8/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/84:34 pm -
1 stop14h 23m
Thu 9/172:49 pm -
1 stop14h 31m
Deal found 8/3$689
This Kiwi.com deal was found by Cheapflights users on 8/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/214:34 pm -
1 stop14h 23m
Thu 10/12:49 pm -
1 stop14h 31m
Deal found 8/3$690
This Kiwi.com deal was found by Cheapflights users on 8/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/207:34 pm -
1 stop13h 11m
Mon 10/52:49 pm -
1 stop14h 31m
Deal found 8/6$693
This Rumbo deal was found by Cheapflights users on 8/3. 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 Rumbo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/52:54 pm -
1 stop17h 51m
Sat 9/264:50 pm -
1 stop13h 30m
Deal found 8/3$695
This FlightHub deal was found by Cheapflights users on 8/4. 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.
Mon 10/55:12 pm -
2 stops15h 28m
Mon 10/193:55 am -
2 stops21h 47m
Deal found 8/4$700
This Kiwi.com deal was found by Cheapflights users on 8/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/316:26 am -
1 stop15h 00m
Thu 9/178:59 am -
1 stop16h 33m
Deal found 8/6$703
This Kiwi.com deal was found by Cheapflights users on 8/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/14:34 pm -
1 stop14h 23m
Mon 9/212:49 pm -
1 stop14h 31m
Deal found 8/2$705
This Kiwi.com deal was found by Cheapflights users on 8/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/122:25 am -
1 stop21h 26m
Wed 10/281:18 pm -
1 stop16h 02m
Deal found 8/3$706
This lastminute.com deal was found by Cheapflights users on 8/3. 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 lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/203:03 pm -
2 stops17h 37m
Wed 9/24:50 pm -
2 stops26h 25m
Deal found 8/3$707
This Copa Airlines deal was found by Cheapflights users on 8/7. 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 Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/232:25 am -
1 stop23h 05m
Tue 9/295:25 am -
1 stop23h 55m
Deal found 8/7$710
This Kiwi.com deal was found by Cheapflights users on 8/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/316:26 am -
1 stop15h 00m
Tue 9/152:49 pm -
1 stop14h 31m
Deal found 8/6$711
This Kiwi.com deal was found by Cheapflights users on 8/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/307:26 pm -
1 stop13h 19m
Tue 9/152:49 pm -
1 stop14h 31m
Deal found 8/6$714

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 August 7, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$667
(United Airlines)

One-way from

$297
(Kiwi.com)

Popular in

December

Cheapest in

September

Average price

$699
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 ($111 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($40 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 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 August 7, 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 Washington, D.C. Dulles Intl - EZE Buenos Aires Ministro Pistarini

IADEZE

Washington, D.C. Dulles Intl

Sun 11/8

3:37 pm-11:43 pm

1 stop30h 06m

Buenos Aires Ministro Pistarini

Thu 11/12

3:40 am-11:33 pm

1 stop21h 53m

$710

Washington, D.C.Buenos Aires

IAD Washington, D.C. Dulles Intl - EZE Buenos Aires Ministro Pistarini

IADEZE

Washington, D.C. Dulles Intl

Mon 10/12

4:34 pm-7:57 am

1 stop14h 23m

Buenos Aires Ministro Pistarini

Mon 10/19

5:25 am-4:20 am

1 stop23h 55m

$710

Washington, D.C.Buenos Aires

IAD Washington, D.C. Dulles Intl - EZE Buenos Aires Ministro Pistarini

IADEZE

Washington, D.C. Dulles Intl

Thu 10/8

4:34 pm-7:57 am

1 stop14h 23m

Buenos Aires Ministro Pistarini

Tue 10/27

12:53 am-12:37 am

1 stop24h 44m

$710

Washington, D.C.Buenos Aires

IAD Washington, D.C. Dulles Intl - EZE Buenos Aires Ministro Pistarini

IADEZE

Washington, D.C. Dulles Intl

Wed 9/16

2:25 am-2:30 am

1 stop23h 05m

Buenos Aires Ministro Pistarini

Sun 9/20

3:48 am-4:20 am

1 stop25h 32m

$710

Washington, D.C.Buenos Aires

IAD Washington, D.C. Dulles Intl - EZE Buenos Aires Ministro Pistarini

IADEZE

Washington, D.C. Dulles Intl

Mon 1/11

1:00 pm-7:35 am

1 stop16h 35m

Buenos Aires Ministro Pistarini

Wed 1/27

7:20 am-12:20 am

2 stops19h 00m

$718

Washington, D.C.Buenos Aires

IAD Washington, D.C. Dulles Intl - AEP Buenos Aires Jorge Newbery

IADAEP

Washington, D.C. Dulles Intl

Fri 9/11

12:26 pm-7:40 am

2 stops18h 14m

Buenos Aires Jorge Newbery

Sat 9/19

3:45 pm-9:09 am

2 stops18h 24m

$722

Washington, D.C.Buenos Aires

IAD Washington, D.C. Dulles Intl - EZE Buenos Aires Ministro Pistarini

IADEZE

Washington, D.C. Dulles Intl

Mon 8/24

5:47 pm-9:45 am

1 stop14h 58m

Buenos Aires Ministro Pistarini

Mon 9/14

8:10 pm-11:30 am

1 stop16h 20m

$722

Washington, D.C.Buenos Aires

IAD Washington, D.C. Dulles Intl - EZE Buenos Aires Ministro Pistarini

IADEZE

Washington, D.C. Dulles Intl

Sat 11/28

8:00 am-9:40 am

1 stop23h 40m

Buenos Aires Ministro Pistarini

Sat 12/12

11:35 pm-9:36 pm

1 stop24h 01m

$722

Washington, D.C.Buenos Aires

IAD Washington, D.C. Dulles Intl - EZE Buenos Aires Ministro Pistarini

IADEZE

Washington, D.C. Dulles Intl

Sun 9/20

7:34 pm-9:45 am

1 stop13h 11m

Buenos Aires Ministro Pistarini

Wed 9/30

3:55 am-12:41 am

2 stops21h 46m

$722
Quickest round-trip

Washington, D.C.Buenos Aires

IAD Washington, D.C. Dulles Intl - EZE Buenos Aires Ministro Pistarini

IADEZE

Washington, D.C. Dulles Intl

Sun 9/20

7:34 pm-9:45 am

1 stop13h 11m

Buenos Aires Ministro Pistarini

Fri 10/2

8:10 pm-10:03 am

1 stop14h 53m

$722

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/6

Showing 1-10 of 43 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 August.
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, September is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Buenos Aires (average of $643). Flying from Washington, D.C. Dulles Intl Airport to Buenos Aires in December is currently the most expensive (average of $1,033). 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?

Airfare is typical for this route at the moment.
Washington, D.C. Dulles Intl Airport to Buenos Aires flights typically cost between $657 and $854 in February.
The cheapest round-trip price found within the last 5 days was $667 on United Airlines (Feb 3-Feb 10).

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 4 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 August 7, 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
7.8
Good
8,504 reviews

Entertainment

7.8

Food

7.2

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

7.8

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
7.8
Good
8,504 reviews
Delta
7.8
Good
8,504 reviews

Entertainment

7.8

Food

7.2

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

7.8

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
7.6
Good
1,563 reviews
Delta
7.8
Good
8,504 reviews

Entertainment

7.8

Food

7.2

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

7.8

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
1,974 reviews
Delta
7.8
Good
8,504 reviews

Entertainment

7.8

Food

7.2

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

7.8

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
10,085 reviews
Delta
7.8
Good
8,504 reviews

Entertainment

7.8

Food

7.2

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

7.8

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
2,526 reviews
Delta
7.8
Good
8,504 reviews

Entertainment

7.8

Food

7.2

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

7.8

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 $718, Copa Airlines can have you in Buenos Aires from Washington, D.C. Dulles Intl Airport in 16h 35m. 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?

    United Airlines, at $265, 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 Delta and LATAM Airlines. United Airlines is 65% 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, September is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Buenos Aires (average of $643). Flying from Washington, D.C. Dulles Intl Airport to Buenos Aires in December is currently the most expensive (average of $1,033). 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 Mendoza flights
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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 August 7, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$265Average$826FlexibilityNo cancel feeOn-time69%
DeltaCheapest$274Average$880FlexibilityNo cancel feeOn-timeN/A
LATAM AirlinesCheapest$317Average$725FlexibilityNo cancel feeOn-time81%
Copa AirlinesCheapest$346Average$764FlexibilityNo cancel feeOn-time70%
AviancaCheapest$536Average$836FlexibilityNo cancel feeOn-time71%

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