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$272+ Cheap flights from Washington, D.C. (WAS) 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 10/28. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — BUE
oct. 15 — oct. 221
mié. 10/15
mié. 10/22
1 adult, Economy
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Cheapflights Tip: The best prices from Washington, D.C. to Buenos Aires are usually found in August or September, booked 50 days in advance, depart on a Monday or Tuesday and return on a Thursday

Cheap flight deals from Washington, D.C. to Buenos Aires

Discover tips and strategies to find the most affordable flight options for your journey from Washington, D.C. (WAS) 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 septiembre 15, 2025.

Round-trip from

$619
(Trip.com)

One-way from

$272
(Copa Airlines)

Popular in

December

Cheapest in

August

Average price

$695
From Washington, D.C. (WAS) to Buenos Aires (BUE)
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One-way flight from Washington, D.C. (WAS) to Buenos Aires (BUE)
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Highest demand for flights based on searches. 17% potential increase in price ($190 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($44 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Washington, D.C. to Buenos Aires

Cheapest flights from Washington, D.C. to Buenos Aires
Explore the most affordable flight options available from Washington, D.C. to Buenos Aires. Find the lowest fares from popular airlines and budget airlines, with prices last updated on septiembre 15, 2025.

This Trip.com deal was found by Cheapflights users on 9/15. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/3010:10 pmIAD - EZE
1 stop31h 10mUnited Airlines
jue. 11/610:05 pmEZE - IAD
1 stop15h 23mUnited Airlines
Deal found 9/15$619
This Copa Airlines deal was found by Cheapflights users on 9/15. 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.
mar. 10/282:25 amIAD - EZE
1 stop21h 35mCopa Airlines
mié. 11/125:16 amEZE - IAD
1 stop24h 06mCopa Airlines
Deal found 9/15$627
This FlightHub deal was found by Cheapflights users on 9/13. 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.
lun. 10/67:35 pmDCA - EZE
2 stops17h 20mLATAM Airlines
mar. 10/216:13 pmEZE - DCA
2 stops20h 32mLATAM Airlines
Deal found 9/13$627
This Cheapflightsfares deal was found by Cheapflights users on 9/13. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/296:45 amIAD - EZE
1 stop22h 05mAvianca
lun. 11/31:40 amEZE - IAD
1 stop13h 35mAvianca
Deal found 9/13$628
This Cheapflightsfares deal was found by Cheapflights users on 9/14. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/296:45 amIAD - EZE
1 stop22h 05mAvianca
mar. 11/41:40 amEZE - IAD
2 stops27h 30mAvianca
Deal found 9/14$630
This Mytrip deal was found by Cheapflights users on 9/12. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/214:05 amIAD - EZE
2 stops19h 05mAvianca
lun. 10/277:35 amEZE - IAD
2 stops20h 05mAvianca
Deal found 9/12$632
This FlightHub deal was found by Cheapflights users on 9/13. 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.
lun. 12/14:05 pmDCA - EZE
2 stops15h 30mLATAM Airlines
mar. 12/212:15 pmEZE - DCA
2 stops27h 44mLATAM Airlines
Deal found 9/13$632
This Flysmarter deal was found by Cheapflights users on 9/15. 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 Flysmarter is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/304:00 amIAD - EZE
2 stops24h 50mAvianca
mié. 11/51:40 amEZE - IAD
1 stop13h 35mAvianca
Deal found 9/15$634
This Avianca deal was found by Cheapflights users on 9/14. 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.
vie. 12/52:35 pmIAD - EZE
1 stop13h 15mAvianca
mar. 12/94:55 pmEZE - IAD
1 stop13h 30mAvianca
Deal found 9/14$635
This Priceline deal was found by Cheapflights users on 9/13. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 11/72:35 pmIAD - EZE
1 stop13h 15mAvianca
dom. 11/167:35 amEZE - IAD
2 stops20h 05mAvianca
Deal found 9/13$636
This Kiwi.com deal was found by Cheapflights users on 9/14. 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.
lun. 9/224:34 pmIAD - EZE
1 stop31h 21mCopa Airlines
dom. 10/52:32 pmEZE - IAD
1 stop14h 48mCopa Airlines
Deal found 9/14$638
This LATAM Airlines deal was found by Cheapflights users on 9/13. 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.
jue. 10/305:52 pmIAD - AEP
2 stops23h 48mLATAM Airlines
mié. 11/125:15 pmAEP - IAD
2 stops20h 19mLATAM Airlines
Deal found 9/13$639

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington, D.C. 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 septiembre 15, 2025.
Use the filters below to find and compare flights from Washington, D.C. to Buenos Aires that are best for you.

Fly from

Washington, D.C.

Fly to

Buenos Aires

Route

Depart

Return

Price

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

mar. 10/28

2:25 am-1:00 am

1 stop21h 35m

Buenos Aires Ministro Pistarini

mar. 11/11

3:57 am-11:33 pm

1 stop21h 36m

$627

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

jue. 12/4

1:13 am-10:31 pm

1 stop19h 18m

Buenos Aires Ministro Pistarini

mar. 12/9

2:32 pm-3:22 am

1 stop14h 50m

$627

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

sáb. 10/11

2:25 am-12:55 am

1 stop21h 30m

Buenos Aires Ministro Pistarini

dom. 10/19

10:07 am-4:20 am

1 stop19h 13m

$627

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

mar. 10/28

2:25 am-1:00 am

1 stop21h 35m

Buenos Aires Ministro Pistarini

mar. 11/4

10:01 am-11:33 pm

1 stop15h 32m

$627

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

mar. 11/4

6:00 am-7:20 am

1 stop23h 20m

Buenos Aires Ministro Pistarini

mar. 11/11

10:05 pm-11:28 am

1 stop15h 23m

$639

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

mié. 11/19

7:01 am-7:20 am

1 stop22h 19m

Buenos Aires Ministro Pistarini

mar. 12/2

10:25 pm-11:39 am

1 stop15h 14m

$639

Washington, D.C.Buenos Aires

DCA - AEP

DCAAEP

Washington, D.C. Reagan-National

mié. 10/29

4:03 pm-4:00 pm

2 stops22h 57m

Buenos Aires Jorge Newbery

mié. 11/5

5:15 pm-1:45 pm

2 stops22h 30m

$639

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

jue. 10/30

7:59 pm-10:15 am

1 stop13h 16m

Buenos Aires Ministro Pistarini

jue. 11/6

10:25 pm-11:57 am

1 stop15h 32m

$639

Washington, D.C.Buenos Aires

DCA - AEP

DCAAEP

Washington, D.C. Reagan-National

sáb. 12/13

2:55 pm-11:40 am

2 stops18h 45m

Buenos Aires Jorge Newbery

lun. 12/29

6:20 pm-12:59 pm

2 stops20h 39m

$639

BaltimoreBuenos Aires

BWI - EZE

BWIEZE

Baltimore/Washington

vie. 1/9

3:52 pm-9:20 am

1 stop15h 28m

Buenos Aires Ministro Pistarini

lun. 3/9

10:55 pm-4:25 pm

1 stop18h 30m

$639

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 60 results
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Best time to book a flight from Washington, D.C. to Buenos Aires

Have a flexible travel schedule? Discover the best time to fly to Buenos Aires from Washington, D.C. 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. to Buenos Aires

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

Use this chart to determine the optimal time to book a round-trip flight from Washington, D.C. to Buenos Aires. Price data was last updated on September 12, 2025.

The best time to book flights from Washington, D.C. to Buenos Aires is 50 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, April is the cheapest month in which you can book a flight from Washington, D.C. to Buenos Aires (average of $795). Flying from Washington, D.C. to Buenos Aires in December is currently the most expensive (average of $1,260). 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 WAS to BUE?

Find hourly flight availability from Washington, D.C. 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 septiembre 15, 2025.

One of the essential ways to save on airfare from Washington, D.C. to Buenos Aires is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the morning could potentially save you up to 13% on airfare.

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

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

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

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

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

Share of 1-stop round-trip flights from Washington, D.C. 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 42% of 1-stop itineraries from Washington, D.C. to Buenos Aires on Cheapflights.

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

Average round-trip fare for 1-stop flights from Washington, D.C. 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. to Buenos Aires?

Shortest average travel time for 1-stop one-way flights from Washington, D.C. 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 15m.

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

Average layover duration for 1-stop one-way flights from Washington, D.C. 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 28m.

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 septiembre 15, 2025.
Peruse reviews from past customers who have flown with Delta, Copa Airlines, and United Airlines from Washington, D.C. to Buenos Aires to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,954 reviews

Crew

8.5

Food

7.3

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,954 reviews
Delta
8.0
Very good
7,954 reviews

Crew

8.5

Food

7.3

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Copa Airlines
7.6
Good
1,531 reviews
Delta
8.0
Very good
7,954 reviews

Crew

8.5

Food

7.3

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,929 reviews
Delta
8.0
Very good
7,954 reviews

Crew

8.5

Food

7.3

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,954 reviews

Crew

8.5

Food

7.3

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Avianca
6.7
Okay
2,435 reviews
Delta
8.0
Very good
7,954 reviews

Crew

8.5

Food

7.3

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

Find useful and relevant information for your journey from Washington, D.C. 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. to Buenos Aires?

    Departing from Washington, D.C. to Buenos Aires will take you 15h 28m. The distance between Washington, D.C. and Buenos Aires is about 5239 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    According to our current data, Avianca ($605), Copa Airlines ($617), and Delta ($629) offers the cheapest pricing from Washington, D.C. to Buenos Aires. Avianca is 34% 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. to Buenos Aires one-way?

    The cheapest airline one-way is Copa Airlines, with whom users have recently found tickets for as low as $272. However, be on the lookout for offers from LATAM Airlines and United Airlines, as they are both options that can get you from Washington, D.C. to Buenos Aires for a low price.

  • What are the most popular routes from Washington, D.C. to Buenos Aires?

    While some choose either Washington, D.C. Reagan-National - Buenos Aires Ministro Pistarini or Baltimore/Washington - Buenos Aires Ministro Pistarini, Washington, D.C. Dulles Intl - Buenos Aires Ministro Pistarini is the most popular route from Washington, D.C. to Buenos Aires.

  • Where are the most common layover locations when flying from Washington, D.C. to Buenos Aires?

    Flights departing from Washington, D.C. and landing in Buenos Aires layover in Atlanta most frequently. Bogotá is the second most popular location for layovers on flights from Washington, D.C. to Buenos Aires. New York follows Bogotá in terms of the most frequent layover location on Washington, D.C. to Buenos Aires flights.

  • What are some popular things to do or see while on a layover in Atlanta?

    Georgia Aquarium, Tabernacle, and Fox Theatre are the most popular attractions in Atlanta if you're in need of something to do during your layover. Georgia Aquarium, Tabernacle and Fox Theatre are located about 8.6 mi, 8.3 mi, and 9.3 mi, respectively from Atlanta Hartsfield-Jackson if you are interested in checking them out. Those landing in Atlanta looking to spend some time exploring during their layover can rent a car for about $53 per day.

  • What are some popular points of interest to see during a layover in Bogotá?

    Bogotá travelers tend to visit Museo del Oro, Museo Botero, and Jardín botánico de Bogotá more than any other notable places. Museo del Oro, Museo Botero, and Jardín botánico de Bogotá are located about 8.6 mi, 8.9 mi, and 4.0 mi, respectively from Bogotá El Dorado. Those landing in Bogotá looking to spend some time exploring during their layover can rent a car for about $50 per day.

  • What are points of interest worth seeing during a layover in New York?

    Most New York visitors opt to spend their time at Times Square, New York City Center, and Madison Square Garden. Times Square, New York City Center and Madison Square Garden are located about 13.6 mi, 13.6 mi, and 13.6 mi, respectively from New York John F Kennedy Intl if you are interested in checking them out. Travelers can book a car rental at New York John F Kennedy Intl for about $76 per day to make their sightseeing more efficient.

  • Where are the least popular layover locations for Washington, D.C. to Buenos Aires flights?

    The least popular layover on flights from Washington, D.C. to Buenos Aires is Miami. Miami is followed by Panama City in terms of the least popular layover location on flights from Washington, D.C. to Buenos Aires.

  • Can I find deals for flights from Washington, D.C. to Buenos Aires that include hotel bookings?

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

  • How can I find direct flights from Washington, D.C. to Buenos Aires?

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

  • Can I find deals for business class flights from Washington, D.C. to Buenos Aires?

    Yes. Cheapflights offers flight deals from Washington, D.C. 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. to Buenos Aires?

    Currently, April is the cheapest month in which you can book a flight from Washington, D.C. to Buenos Aires (average of $795). Flying from Washington, D.C. to Buenos Aires in December is currently the most expensive (average of $1,260). 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

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Top 6 airlines flying from Washington, D.C. to Buenos Aires

Discover the top 6 airlines that operate flights from Washington, D.C. 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 septiembre 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
AviancaCheapest$605Average$836FlexibilityNo cancel feeOn-time71%
Copa AirlinesCheapest$617Average$830FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$629Average$856FlexibilityNo cancel feeOn-time69%
DeltaCheapest$629Average$1,096FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$639Average$1,196FlexibilityNo cancel feeOn-time71%
LATAM AirlinesCheapest$678Average$687FlexibilityNo cancel feeOn-time81%

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