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$265+ 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 8/27. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — BUE
Aug 4 — Aug 111
Mon 8/4
Mon 8/11
1 adult, Economy
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Cheapflights Tip: The best prices from Washington, D.C. to Buenos Aires are usually found in September or October, 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 July 30, 2025.

Round-trip from

$625
(United Airlines)

One-way from

$265
(Mytrip)

Popular in

December

Cheapest in

September

Average price

$863
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. 16% potential increase in price ($197 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($45 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 30, 2025.

This United Airlines deal was found by Cheapflights users on 7/28. 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.
Thu 9/116:00 amBWI - EZE
1 stop25h 00mUnited Airlines
Thu 9/189:00 pmEZE - BWI
1 stop20h 17mUnited Airlines
Deal found 7/28$625
This Delta deal was found by Cheapflights users on 7/29. 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.
Wed 8/2712:17 pmBWI - EZE
1 stop20h 28mDelta
Sat 9/68:10 pmEZE - BWI
1 stop17h 20mDelta
Deal found 7/29$627
This FlightHub deal was found by Cheapflights users on 7/30. 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 9/227:25 pmBWI - AEP
2 stops19h 40mLATAM Airlines
Mon 10/135:00 pmAEP - BWI
2 stops19h 21mLATAM Airlines
Deal found 7/30$632
This FlightHub deal was found by Cheapflights users on 7/30. 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 10/207:45 pmBWI - EZE
2 stops17h 10mLATAM Airlines
Thu 10/307:55 amEZE - BWI
2 stops17h 46mLATAM Airlines
Deal found 7/30$632
This LATAM Airlines deal was found by Cheapflights users on 7/30. 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 11/279:00 amIAD - AEP
2 stops20h 55mLATAM Airlines
Thu 12/113:40 pmAEP - IAD
2 stops22h 10mLATAM Airlines
Deal found 7/30$639
This Delta deal was found by Cheapflights users on 7/27. 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 8/193:26 pmIAD - EZE
1 stop17h 19mDelta
Tue 8/268:10 pmEZE - IAD
1 stop19h 21mDelta
Deal found 7/27$639
This LATAM Airlines deal was found by Cheapflights users on 7/30. 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.
Mon 8/182:59 pmDCA - AEP
2 stops22h 41mLATAM Airlines
Fri 8/293:40 pmAEP - DCA
2 stops28h 12mLATAM Airlines
Deal found 7/30$639
This Delta deal was found by Cheapflights users on 7/28. 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 8/191:40 pmDCA - EZE
1 stop19h 05mDelta
Thu 8/288:10 pmEZE - DCA
1 stop22h 18mDelta
Deal found 7/28$639
This Priceline deal was found by Cheapflights users on 7/29. 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.
Wed 9/177:00 amIAD - EZE
1 stop16h 10mAvianca
Sat 9/201:40 amEZE - IAD
2 stops26h 05mAvianca
Deal found 7/29$641
This American Airlines deal was found by Cheapflights users on 7/27. 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 9/111:30 pmDCA - EZE
2 stops16h 50mAmerican Airlines
Thu 9/188:40 pmEZE - DCA
1 stop21h 20mAmerican Airlines
Deal found 7/27$643
This American Airlines deal was found by Cheapflights users on 7/30. 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.
Mon 8/2510:25 amIAD - EZE
2 stops22h 50mAmerican Airlines
Fri 9/58:40 pmEZE - IAD
2 stops27h 08mAmerican Airlines
Deal found 7/30$644
This American Airlines deal was found by Cheapflights users on 7/29. 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.
Mon 8/256:00 amBWI - EZE
2 stops24h 25mAmerican Airlines
Fri 9/58:40 pmEZE - BWI
2 stops25h 12mAmerican Airlines
Deal found 7/29$644

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 July 30, 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

BaltimoreBuenos Aires

BWI - EZE

BWIEZE

Baltimore/Washington

Thu 9/11

6:00 am-8:00 am

1 stop25h 00m

Buenos Aires Ministro Pistarini

Thu 9/18

9:00 pm-4:17 pm

1 stop20h 17m

$625

BaltimoreBuenos Aires

BWI - EZE

BWIEZE

Baltimore/Washington

Wed 8/27

6:25 pm-9:45 am

1 stop14h 20m

Buenos Aires Ministro Pistarini

Sun 9/7

8:10 pm-6:52 pm

1 stop23h 42m

$627

BaltimoreBuenos Aires

BWI - AEP

BWIAEP

Baltimore/Washington

Mon 9/22

7:25 pm-4:05 pm

2 stops19h 40m

Buenos Aires Jorge Newbery

Mon 10/13

5:00 pm-11:21 am

2 stops19h 21m

$632

BaltimoreBuenos Aires

BWI - EZE

BWIEZE

Baltimore/Washington

Mon 10/20

7:45 pm-1:55 pm

2 stops17h 10m

Buenos Aires Ministro Pistarini

Thu 10/30

7:55 am-12:41 am

2 stops17h 46m

$632

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Tue 8/19

3:26 pm-9:45 am

1 stop17h 19m

Buenos Aires Ministro Pistarini

Tue 8/26

8:10 pm-2:31 pm

1 stop19h 21m

$639

Washington, D.C.Buenos Aires

DCA - EZE

DCAEZE

Washington, D.C. Reagan-National

Tue 8/19

2:59 pm-8:00 am

1 stop16h 01m

Buenos Aires Ministro Pistarini

Mon 8/25

9:00 pm-6:41 pm

1 stop22h 41m

$639

Washington, D.C.Buenos Aires

IAD - AEP

IADAEP

Washington, D.C. Dulles Intl

Thu 11/27

9:00 am-7:55 am

2 stops20h 55m

Buenos Aires Jorge Newbery

Thu 12/11

3:40 pm-11:50 am

2 stops22h 10m

$639

Washington, D.C.Buenos Aires

DCA - AEP

DCAAEP

Washington, D.C. Reagan-National

Mon 8/18

2:59 pm-2:40 pm

2 stops22h 41m

Buenos Aires Jorge Newbery

Tue 8/26

3:40 pm-2:04 pm

2 stops23h 24m

$639

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Wed 9/17

7:00 am-12:10 am

1 stop16h 10m

Buenos Aires Ministro Pistarini

Sat 9/20

1:40 am-2:45 am

2 stops26h 05m

$641

Washington, D.C.Buenos Aires

DCA - EZE

DCAEZE

Washington, D.C. Reagan-National

Thu 9/11

1:30 pm-7:20 am

2 stops16h 50m

Buenos Aires Ministro Pistarini

Thu 9/18

8:40 pm-5:00 pm

1 stop21h 20m

$643

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

Showing 1-10 of 51 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 July 25, 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 July 30, 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 64% 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 Panama City (PTY) have the shortest average one-way travel time for 1-stop routes: 13h 51m.

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 Panama City (PTY) offer the fastest connection on this route, with an average layover time of 1h 39m.

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 July 30, 2025.
Peruse reviews from past customers who have flown with Delta, LATAM Airlines, and Copa 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
7,980 reviews

Boarding

8.2

Comfort

7.9

Crew

8.5

Overall

8.0

Food

7.3

Entertainment

7.9

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
7,980 reviews
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Comfort

7.9

Crew

8.5

Overall

8.0

Food

7.3

Entertainment

7.9

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!
LATAM Airlines
7.5
Good
1,822 reviews
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Comfort

7.9

Crew

8.5

Overall

8.0

Food

7.3

Entertainment

7.9

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
7.5
Good
1,493 reviews
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Comfort

7.9

Crew

8.5

Overall

8.0

Food

7.3

Entertainment

7.9

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
8,896 reviews
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Comfort

7.9

Crew

8.5

Overall

8.0

Food

7.3

Entertainment

7.9

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!
GOL
7.3
Good
1,091 reviews
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Comfort

7.9

Crew

8.5

Overall

8.0

Food

7.3

Entertainment

7.9

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.

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

    According to our current data, United Airlines ($625), Delta ($627), and LATAM Airlines ($634) offers the cheapest pricing from Washington, D.C. to Buenos Aires. United Airlines is 35% 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 Avianca, with whom users have recently found tickets for as low as $265. However, be on the lookout for offers from Delta and LATAM 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, Fox Theatre, and Tabernacle are the most popular attractions in Atlanta if you're in need of something to do during your layover. Georgia Aquarium, Fox Theatre and Tabernacle are located about 8.6 mi, 9.3 mi, and 8.3 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 $57 per day.

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

    Bogotá travelers tend to visit Museo Botero, Museo del Oro, and Jardín botánico de Bogotá more than any other notable places. Museo Botero, Museo del Oro, and Jardín botánico de Bogotá are located about 8.9 mi, 8.6 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 $54 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 $84 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 New York 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

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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 July 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
Copa AirlinesCheapest$549Average$829FlexibilityNo cancel feeOn-time70%
AviancaCheapest$605Average$847FlexibilityNo cancel feeOn-time71%
American AirlinesCheapest$629Average$1,108FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$629Average$893FlexibilityNo cancel feeOn-time69%
DeltaCheapest$629Average$1,126FlexibilityNo cancel feeOn-timeN/A
LATAM AirlinesCheapest$678Average$773FlexibilityNo cancel feeOn-time81%

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