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$275+ 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 8/31. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — BUE
Aug 24 — Aug 311
Mon 8/24
Mon 8/31
1 adult, Economy
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Cheap 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 25, 2026.

This LATAM Airlines deal was found by Cheapflights users on 7/20. 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.
Wed 8/195:00 pm
BWI
-
EZE
1 stop15h 45m
LATAM Airlines
Wed 8/268:10 pm
EZE
-
BWI
1 stop15h 47m
LATAM Airlines
Deal found 7/20$667
This United Airlines deal was found by Cheapflights users on 7/22. 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 8/153:04 pm
BWI
-
EZE
1 stop15h 56m
United Airlines
Tue 8/189:00 pm
EZE
-
BWI
1 stop20h 28m
United Airlines
Deal found 7/22$679
This United Airlines deal was found by Cheapflights users on 7/22. 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.
Fri 8/143:04 pm
BWI
-
EZE
1 stop15h 56m
United Airlines
Wed 8/269:00 pm
EZE
-
BWI
1 stop20h 28m
United Airlines
Deal found 7/22$688
This Delta deal was found by Cheapflights users on 7/21. 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 8/132:18 pm
BWI
-
EZE
2 stops18h 22m
Delta
Wed 8/198:10 pm
EZE
-
BWI
1 stop20h 36m
Delta
Deal found 7/21$692
This LATAM Airlines deal was found by Cheapflights users on 7/20. 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.
Wed 8/194:00 pm
DCA
-
EZE
1 stop16h 45m
LATAM Airlines
Wed 8/268:10 pm
EZE
-
DCA
1 stop16h 17m
LATAM Airlines
Deal found 7/20$695
This American Airlines deal was found by Cheapflights users on 7/22. 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 8/196:52 pm
BWI
-
EZE
1 stop12h 53m
American Airlines
Mon 8/318:50 pm
EZE
-
BWI
1 stop26h 03m
American Airlines
Deal found 7/22$696
This Justfly.com deal was found by Cheapflights users on 7/22. 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.
Wed 9/161:35 pm
DCA
-
EZE
1 stop19h 05m
LATAM Airlines
Wed 9/237:21 pm
EZE
-
DCA
2 stops19h 28m
LATAM Airlines
Deal found 7/22$697
This LATAM Airlines deal was found by Cheapflights users on 7/20. 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.
Wed 8/193:03 pm
IAD
-
EZE
2 stops17h 37m
LATAM Airlines
Wed 8/263:45 pm
EZE
-
IAD
2 stops20h 48m
LATAM Airlines
Deal found 7/20$699
This Copa Airlines deal was found by Cheapflights users on 7/22. 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.
Sun 9/64:41 pm
BWI
-
EZE
1 stop14h 16m
Copa Airlines
Sat 9/122:17 am
EZE
-
BWI
1 stop13h 58m
Copa Airlines
Deal found 7/22$699
This FlightHub deal was found by Cheapflights users on 7/24. 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.
Thu 9/175:12 pm
IAD
-
EZE
2 stops15h 28m
LATAM Airlines
Tue 9/227:35 am
EZE
-
IAD
2 stops18h 06m
LATAM Airlines
Deal found 7/24$701
This Justfly.com deal was found by Cheapflights users on 7/21. 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.
Wed 10/74:00 pm
DCA
-
EZE
2 stops16h 40m
LATAM Airlines
Tue 10/277:20 am
EZE
-
DCA
2 stops17h 25m
LATAM Airlines
Deal found 7/21$701
This United Airlines deal was found by Cheapflights users on 7/20. 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.
Mon 11/164:30 pm
BWI
-
EZE
1 stop14h 50m
United Airlines
Thu 12/311:55 pm
EZE
-
BWI
1 stop24h 39m
United Airlines
Deal found 7/20$705

Find 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 25, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$667
(LATAM Airlines)

One-way from

$275
(Kiwi.com)

Popular in

December

Cheapest in

September

Average price

$816
Provider with most accurate pricing for Washington, D.C. (WAS)-Buenos Aires (BUE) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-Buenos Aires (BUE) flights.
Search Deals
From Washington, D.C. (WAS) to Buenos Aires (BUE)
Search Deals
One-way flight from Washington, D.C. (WAS) to Buenos Aires (BUE)
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($83 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($26 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

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 25, 2026.
Use the filters below to find and compare flights from Washington, D.C. to Buenos Aires that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BaltimoreBuenos Aires

BWI - EZE

BWIEZE

Baltimore/Washington

Sat 8/15

3:04 pm-8:00 am

1 stop15h 56m

Buenos Aires Ministro Pistarini

Tue 8/18

9:00 pm-4:28 pm

1 stop20h 28m

$679

BaltimoreBuenos Aires

BWI - EZE

BWIEZE

Baltimore/Washington

Thu 9/17

2:03 pm-9:40 am

2 stops18h 37m

Buenos Aires Ministro Pistarini

Mon 9/28

8:10 pm-12:56 pm

1 stop17h 46m

$692

BaltimoreBuenos Aires

BWI - EZE

BWIEZE

Baltimore/Washington

Thu 8/13

12:03 pm-9:40 am

2 stops20h 37m

Buenos Aires Ministro Pistarini

Tue 8/18

8:10 pm-9:19 am

1 stop14h 09m

$692

BaltimoreBuenos Aires

BWI - EZE

BWIEZE

Baltimore/Washington

Wed 11/18

11:00 am-9:40 am

2 stops20h 40m

Buenos Aires Ministro Pistarini

Fri 12/4

3:10 pm-11:08 am

2 stops21h 58m

$709

BaltimoreBuenos Aires

BWI - EZE

BWIEZE

Baltimore/Washington

Mon 11/16

2:10 pm-9:40 am

2 stops17h 30m

Buenos Aires Ministro Pistarini

Wed 12/2

1:10 pm-11:08 am

2 stops23h 58m

$709

BaltimoreBuenos Aires

BWI - EZE

BWIEZE

Baltimore/Washington

Tue 11/17

8:10 am-9:40 am

2 stops23h 30m

Buenos Aires Ministro Pistarini

Wed 12/2

9:30 pm-9:16 am

1 stop13h 46m

$709

Washington, D.C.Buenos Aires

IAD - EZE

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 - EZE

IADEZE

Washington, D.C. Dulles Intl

Mon 10/5

2:25 am-2:30 am

1 stop23h 05m

Buenos Aires Ministro Pistarini

Fri 10/23

4:15 am-4:20 am

1 stop25h 05m

$710

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Thu 9/10

2:25 am-4:21 am

1 stop24h 56m

Buenos Aires Ministro Pistarini

Fri 10/2

5:25 am-12:32 am

1 stop20h 07m

$710

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Sun 10/4

2:25 am-2:30 am

1 stop23h 05m

Buenos Aires Ministro Pistarini

Tue 10/20

8:59 am-12:32 am

1 stop16h 33m

$710

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/20

Showing 1-10 of 60 resultsSorted by cheapest first
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Compare providers for flights from Washington, D.C. 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 Washington, D.C. to Buenos Aires in July.
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
Kiwi.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.-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.-Buenos Aires flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C.-Buenos Aires flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Washington, D.C.-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.-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 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

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

Currently, September is the cheapest month in which you can book a flight from Washington, D.C. to Buenos Aires (average of $673). Flying from Washington, D.C. to Buenos Aires in December is currently the most expensive (average of $1,081). 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. to Buenos Aires?

Airfare is typical for this route at the moment.
Washington, D.C. to Buenos Aires flights typically cost between $666 and $878 in August.
The cheapest round-trip price found within the last 5 days was $667 on LATAM Airlines (Aug 19-Aug 26).

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 56% 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.

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. 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 Atlanta (ATL) have the shortest average one-way travel time for 1-stop routes: 13h 07m.

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.

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

The best time to book flights from Washington, D.C. to Buenos Aires is 5 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.

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 25, 2026.
Peruse reviews from past customers who have flown with Delta,Copa Airlines, andUnited 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
7.8
Good
8,486 reviews

Comfort

7.8

Entertainment

7.8

Boarding

8.1

Food

7.2

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
8,486 reviews
Delta
7.8
Good
8,486 reviews

Comfort

7.8

Entertainment

7.8

Boarding

8.1

Food

7.2

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
1,561 reviews
Delta
7.8
Good
8,486 reviews

Comfort

7.8

Entertainment

7.8

Boarding

8.1

Food

7.2

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
10,037 reviews
Delta
7.8
Good
8,486 reviews

Comfort

7.8

Entertainment

7.8

Boarding

8.1

Food

7.2

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
American Airlines
7.1
Good
11,844 reviews
Delta
7.8
Good
8,486 reviews

Comfort

7.8

Entertainment

7.8

Boarding

8.1

Food

7.2

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
2,520 reviews
Delta
7.8
Good
8,486 reviews

Comfort

7.8

Entertainment

7.8

Boarding

8.1

Food

7.2

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 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 56m. 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, United Airlines ($265), Delta ($274), and LATAM Airlines ($317) offers the cheapest pricing from Washington, D.C. to Buenos Aires. United Airlines is 66% cheaper than the average price of flights available within the next 90 days to this destination.

  • 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. Houston 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, Centennial Olympic Park, and Fox Theatre are the most popular attractions in Atlanta if you're in need of something to do during your layover. Georgia Aquarium, Centennial Olympic Park and Fox Theatre are located about 8.6 mi, 8.4 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 $54 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 Plaza de Bolívar more than any other notable places. Museo del Oro, Museo Botero, and Plaza de Bolívar are located about 8.6 mi, 8.9 mi, and 8.7 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 $53 per day.

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

    Most Houston visitors opt to spend their time at Space Center Houston, House of Blues Houston, and Bayou Music Center. Space Center Houston, House of Blues Houston and Bayou Music Center are located about 33.5 mi, 16.1 mi, and 15.5 mi, respectively from Houston George Bush Intcntl if you are interested in checking them out. Travelers can book a car rental at Houston George Bush Intcntl for about $41 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, September is the cheapest month in which you can book a flight from Washington, D.C. to Buenos Aires (average of $673). Flying from Washington, D.C. to Buenos Aires in December is currently the most expensive (average of $1,081). 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 Washington, D.C. to Buenos Aires

See prices for flight routes from nearby airports that may be better suited for you.
Dulles Intl to Jorge Newbery flights
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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 25, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$265Average$818FlexibilityNo cancel feeOn-time69%
DeltaCheapest$274Average$773FlexibilityNo cancel feeOn-timeN/A
LATAM AirlinesCheapest$278Average$724FlexibilityNo cancel feeOn-time81%
Copa AirlinesCheapest$336Average$763FlexibilityNo cancel feeOn-time70%
AviancaCheapest$536Average$836FlexibilityNo cancel feeOn-time71%
American AirlinesCheapest$599Average$839FlexibilityNo cancel feeOn-time71%

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