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$261+ Cheap flights from Reagan-National (DCA) 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 3/18. Fares are subject to change and may not be available on all flights or dates of travel.
DCA — BUE
Feb 26 — Mar 51
Thu 2/26
Thu 3/5
1 adult, Economy
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Cheap flight deals from Reagan-National to Buenos Aires

Cheapest flights from Reagan-National to Buenos Aires
Explore the most affordable flight options available from Reagan-National to Buenos Aires. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 27, 2026.

This United Airlines deal was found by Cheapflights users on 1/25. 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 2/266:00 am
DCA
-
EZE
1 stop25h 20m
United Airlines
Sun 3/111:55 pm
EZE
-
DCA
1 stop25h 55m
United Airlines
Deal found 1/25$611
This United Airlines deal was found by Cheapflights users on 1/26. 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 2/24:28 pm
DCA
-
EZE
1 stop14h 52m
United Airlines
Tue 2/2410:05 pm
EZE
-
DCA
1 stop15h 30m
United Airlines
Deal found 1/26$621
This American Airlines deal was found by Cheapflights users on 1/26. 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 4/81:44 pm
DCA
-
EZE
2 stops15h 16m
American Airlines
Mon 4/2010:20 pm
EZE
-
DCA
1 stop15h 23m
American Airlines
Deal found 1/26$625
This American Airlines deal was found by Cheapflights users on 1/26. 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 2/51:35 pm
DCA
-
EZE
1 stop19h 05m
American Airlines
Tue 2/1010:10 am
EZE
-
DCA
1 stop13h 20m
American Airlines
Deal found 1/26$626
This United Airlines deal was found by Cheapflights users on 1/26. 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.
Sun 3/12:45 pm
DCA
-
EZE
1 stop14h 35m
United Airlines
Fri 3/610:05 pm
EZE
-
DCA
1 stop27h 27m
United Airlines
Deal found 1/26$629
This Delta deal was found by Cheapflights users on 1/25. 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 2/57:59 am
DCA
-
EZE
1 stop23h 01m
Delta
Tue 2/108:55 pm
EZE
-
DCA
1 stop14h 15m
Delta
Deal found 1/25$633
This KAYAK deal was found by Cheapflights users on 1/27. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/241:45 pm
DCA
-
AEP
2 stops27h 55m
LATAM Airlines
Tue 3/318:40 am
AEP
-
DCA
2 stops30h 15m
LATAM Airlines
Deal found 1/27$637
This Delta deal was found by Cheapflights users on 1/26. 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.
Sat 10/106:25 pm
DCA
-
EZE
2 stops19h 20m
Delta
Thu 10/294:45 pm
EZE
-
DCA
2 stops19h 27m
Delta
Deal found 1/26$637
This KAYAK deal was found by Cheapflights users on 1/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/72:55 pm
DCA
-
EZE
2 stops22h 50m
LATAM Airlines
Wed 5/137:35 am
EZE
-
DCA
3 stops31h 30m
LATAM Airlines
Deal found 1/25$640
This KAYAK deal was found by Cheapflights users on 1/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/3012:10 pm
DCA
-
EZE
2 stops19h 25m
LATAM Airlines
Wed 4/87:35 am
EZE
-
DCA
2 stops17h 04m
LATAM Airlines
Deal found 1/25$641
This LATAM Airlines deal was found by Cheapflights users on 1/26. 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 2/56:59 am
DCA
-
EZE
1 stop24h 01m
LATAM Airlines
Tue 2/107:43 pm
EZE
-
DCA
2 stops22h 46m
LATAM Airlines
Deal found 1/26$642
This Travelocity deal was found by Cheapflights users on 1/26. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/122:55 pm
DCA
-
AEP
2 stops24h 05m
LATAM Airlines
Fri 10/302:55 pm
AEP
-
DCA
2 stops24h 01m
LATAM Airlines
Deal found 1/26$667

Find flight deals from Reagan-National to Buenos Aires

Discover tips and strategies to find the most affordable flight options for your journey from Reagan-National (DCA) 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 January 27, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$611
(United Airlines)

One-way from

$261
(United Airlines)

Popular in

January

Cheapest in

April

Average price

$1,239
Provider with most accurate pricing for Washington, D.C. Reagan-National-Buenos Aires (BUE) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. Reagan-National-Buenos Aires (BUE) flights.
Search Deals
From Washington, D.C. Reagan-National to Buenos Aires (BUE)
Search Deals
One-way flight from Washington, D.C. Reagan-National to Buenos Aires (BUE)
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($161 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($32 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Reagan-National 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 January 27, 2026.
Use the filters below to find and compare flights from Washington, D.C. Reagan-National Airport to Buenos Aires that are best for you.

Fly from

Reagan-National

Fly to

Buenos Aires

Route

Depart

Return

Price

Washington, D.C.Buenos Aires

DCA - EZE

DCAEZE

Washington, D.C. Reagan-National

Sun 3/1

2:45 pm-7:20 am

1 stop14h 35m

Buenos Aires Ministro Pistarini

Mon 3/9

10:55 pm-1:43 pm

1 stop15h 48m

$621

Washington, D.C.Buenos Aires

DCA - EZE

DCAEZE

Washington, D.C. Reagan-National

Mon 3/2

2:45 pm-9:20 am

1 stop16h 35m

Buenos Aires Ministro Pistarini

Thu 3/19

10:55 pm-1:43 pm

1 stop15h 48m

$621

Washington, D.C.Buenos Aires

DCA - EZE

DCAEZE

Washington, D.C. Reagan-National

Mon 2/9

2:45 pm-7:20 am

1 stop14h 35m

Buenos Aires Ministro Pistarini

Sun 2/15

10:05 pm-11:35 am

1 stop15h 30m

$621

Washington, D.C.Buenos Aires

DCA - EZE

DCAEZE

Washington, D.C. Reagan-National

Wed 3/4

11:00 am-7:20 am

1 stop18h 20m

Buenos Aires Ministro Pistarini

Thu 3/19

9:05 pm-11:36 am

1 stop15h 31m

$621

Washington, D.C.Buenos Aires

DCA - EZE

DCAEZE

Washington, D.C. Reagan-National

Mon 2/23

6:00 am-7:20 am

1 stop23h 20m

Buenos Aires Ministro Pistarini

Tue 3/10

9:05 pm-11:36 am

1 stop15h 31m

$621

Washington, D.C.Buenos Aires

DCA - EZE

DCAEZE

Washington, D.C. Reagan-National

Sun 3/1

12:47 pm-9:20 am

1 stop18h 33m

Buenos Aires Ministro Pistarini

Thu 3/5

10:05 pm-1:43 pm

1 stop17h 38m

$621

Washington, D.C.Buenos Aires

DCA - EZE

DCAEZE

Washington, D.C. Reagan-National

Sun 3/1

12:47 pm-9:20 am

1 stop18h 33m

Buenos Aires Ministro Pistarini

Thu 3/19

10:55 pm-1:43 pm

1 stop15h 48m

$621

Washington, D.C.Buenos Aires

DCA - EZE

DCAEZE

Washington, D.C. Reagan-National

Wed 2/25

7:59 pm-9:20 am

1 stop35h 21m

Buenos Aires Ministro Pistarini

Tue 3/10

9:05 pm-6:46 pm

1 stop22h 41m

$629

Washington, D.C.Buenos Aires

DCA - AEP

DCAAEP

Washington, D.C. Reagan-National

Sun 4/19

3:00 pm-6:30 pm

2 stops26h 30m

Buenos Aires Jorge Newbery

Mon 4/27

5:05 pm-6:33 pm

2 stops26h 28m

$637

Washington, D.C.Buenos Aires

DCA - EZE

DCAEZE

Washington, D.C. Reagan-National

Sun 3/1

5:00 pm-10:15 am

1 stop15h 15m

Buenos Aires Ministro Pistarini

Wed 3/11

10:25 pm-5:00 pm

1 stop19h 35m

$637

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/25

Showing 1-10 of 39 results
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Compare providers for flights from Reagan-National 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 Reagan-National to Buenos Aires in January.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*3 stars
oojoPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 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. Reagan-National 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. Reagan-National Airport-Buenos Aires flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C. Reagan-National 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. Reagan-National 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. Reagan-National 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 Reagan-National to Buenos Aires

Have a flexible travel schedule? Discover the best time to fly to Buenos Aires from Reagan-National 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. Reagan-National Airport to Buenos Aires

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

Currently, December is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to Buenos Aires (average of $507). Flying from Washington, D.C. Reagan-National Airport to Buenos Aires in July is currently the most expensive (average of $792). 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.

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 January 27, 2026.
Read reviews from past customers who have flown Delta, LATAM Airlines, and United Airlines from Washington, D.C. Reagan-National Airport to Buenos Aires. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,119 reviews

Crew

8.5

Food

7.2

Entertainment

7.8

Overall

7.9

Boarding

8.1

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,119 reviews
Delta
7.9
Good
8,119 reviews

Crew

8.5

Food

7.2

Entertainment

7.8

Overall

7.9

Boarding

8.1

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
LATAM Airlines
7.5
Good
1,912 reviews
Delta
7.9
Good
8,119 reviews

Crew

8.5

Food

7.2

Entertainment

7.8

Overall

7.9

Boarding

8.1

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,205 reviews
Delta
7.9
Good
8,119 reviews

Crew

8.5

Food

7.2

Entertainment

7.8

Overall

7.9

Boarding

8.1

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
American Airlines
7.2
Good
11,197 reviews
Delta
7.9
Good
8,119 reviews

Crew

8.5

Food

7.2

Entertainment

7.8

Overall

7.9

Boarding

8.1

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

Find useful and relevant information for your journey from Reagan-National 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. Reagan-National Airport to Buenos Aires?

    Departing from Washington, D.C. Reagan-National Airport to Buenos Aires will take you 14h 35m. Airlines will cover a distance of 5222 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. Reagan-National Airport to Buenos Aires round-trip?

    Flying on Delta is currently your cheapest option to Buenos Aires, with prices starting at $274. Additional round-trip tickets that might be worth considering are offered by LATAM Airlines and American Airlines, with the lowest prices starting at $506 and $600, respectively. These flights start at 69% lower than the current average price 3 months from now.

  • Can I find deals for flights from Reagan-National to Buenos Aires that include hotel bookings?

    Yes. In addition to deals on Reagan-National to Buenos Aires flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Reagan-National to Buenos Aires?

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

  • Can I find deals for business class flights from Reagan-National to Buenos Aires?

    Yes. Cheapflights offers flight deals from Reagan-National 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. Reagan-National Airport to Buenos Aires?

    Currently, December is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to Buenos Aires (average of $507). Flying from Washington, D.C. Reagan-National Airport to Buenos Aires in July is currently the most expensive (average of $792). 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 Reagan-National to Buenos Aires

See prices for flight routes from nearby airports that may be better suited for you.
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Top 4 airlines flying from Reagan-National to Buenos Aires

Discover the top 4 airlines that operate flights from Reagan-National 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 January 27, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$274Average$882FlexibilityNo cancel feeOn-timeN/A
LATAM AirlinesCheapest$506Average$687FlexibilityNo cancel feeOn-time81%
American AirlinesCheapest$600Average$781FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$629Average$930FlexibilityNo cancel feeOn-time69%

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