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$310+ 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 4/10. Fares are subject to change and may not be available on all flights or dates of travel.
DCA — BUE
Apr 15 — Apr 221
Wed 4/15
Wed 4/22
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 March 16, 2026.

This United Airlines deal was found by Cheapflights users on 3/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/611:05 am
DCA
-
EZE
1 stop19h 55m
United Airlines
Mon 5/119:00 pm
EZE
-
DCA
1 stop25h 05m
United Airlines
Deal found 3/13$601
This Delta deal was found by Cheapflights users on 3/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/46:00 pm
DCA
-
EZE
1 stop14h 45m
Delta
Sun 5/178:10 pm
EZE
-
DCA
1 stop28h 34m
Delta
Deal found 3/15$622
This Delta deal was found by Cheapflights users on 3/14. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/37:38 pm
DCA
-
EZE
1 stop13h 07m
Delta
Tue 5/198:10 pm
EZE
-
DCA
1 stop26h 35m
Delta
Deal found 3/14$624
This Delta deal was found by Cheapflights users on 3/13. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/26:10 pm
DCA
-
EZE
1 stop14h 35m
Delta
Fri 5/151:10 pm
EZE
-
DCA
1 stop25h 39m
Delta
Deal found 3/13$625
This KAYAK deal was found by Cheapflights users on 3/13. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/135:00 pm
DCA
-
EZE
2 stops17h 30m
LATAM Airlines
Wed 5/208:10 pm
EZE
-
DCA
1 stop17h 33m
LATAM Airlines
Deal found 3/13$637
This Justfly.com deal was found by Cheapflights users on 3/12. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/117:30 pm
DCA
-
EZE
1 stop13h 15m
LATAM Airlines
Thu 5/281:10 pm
EZE
-
DCA
2 stops22h 50m
LATAM Airlines
Deal found 3/12$641
This Delta deal was found by Cheapflights users on 3/13. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/26:10 pm
DCA
-
EZE
1 stop14h 35m
Delta
Sun 5/101:10 pm
EZE
-
DCA
1 stop25h 39m
Delta
Deal found 3/13$642
This KAYAK deal was found by Cheapflights users on 3/15. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/66:00 pm
DCA
-
EZE
1 stop14h 45m
LATAM Airlines
Tue 5/121:10 pm
EZE
-
DCA
1 stop25h 39m
LATAM Airlines
Deal found 3/15$645
This American Airlines deal was found by Cheapflights users on 3/13. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/272:54 pm
DCA
-
EZE
1 stop14h 16m
American Airlines
Mon 5/411:35 pm
EZE
-
DCA
1 stop14h 05m
American Airlines
Deal found 3/13$648
This KAYAK deal was found by Cheapflights users on 3/12. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/46:25 pm
DCA
-
AEP
2 stops19h 35m
LATAM Airlines
Sun 11/155:05 pm
AEP
-
DCA
2 stops19h 49m
LATAM Airlines
Deal found 3/12$651
This LATAM Airlines deal was found by Cheapflights users on 3/12. 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 LATAM Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/151:45 pm
DCA
-
EZE
1 stop15h 35m
LATAM Airlines
Sun 11/294:45 pm
EZE
-
DCA
2 stops20h 27m
LATAM Airlines
Deal found 3/12$651
This KAYAK deal was found by Cheapflights users on 3/15. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/122:55 pm
DCA
-
EZE
2 stops21h 50m
LATAM Airlines
Sat 11/217:45 am
EZE
-
DCA
3 stops32h 11m
LATAM Airlines
Deal found 3/15$654

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 March 16, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$601
(United Airlines)

One-way from

$310
(FlightHub)

Popular in

July

Cheapest in

April

Average price

$899
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. 16% potential increase in price ($159 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($32 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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 March 16, 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

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Buenos Aires

DCA - EZE

DCAEZE

Washington, D.C. Reagan-National

Wed 5/6

2:35 pm-8:00 am

1 stop16h 25m

Buenos Aires Ministro Pistarini

Sun 5/17

9:00 pm-11:40 am

1 stop15h 40m

$601

Washington, D.C.Buenos Aires

DCA - EZE

DCAEZE

Washington, D.C. Reagan-National

Fri 5/8

12:40 pm-8:00 am

1 stop18h 20m

Buenos Aires Ministro Pistarini

Sun 5/17

9:00 pm-6:50 pm

1 stop22h 50m

$601

Washington, D.C.Buenos Aires

DCA - EZE

DCAEZE

Washington, D.C. Reagan-National

Mon 4/27

2:33 pm-8:00 am

1 stop16h 27m

Buenos Aires Ministro Pistarini

Wed 5/6

9:00 pm-11:40 am

1 stop15h 40m

$711

Washington, D.C.Buenos Aires

DCA - EZE

DCAEZE

Washington, D.C. Reagan-National

Fri 4/24

6:00 am-8:00 am

1 stop25h 00m

Buenos Aires Ministro Pistarini

Tue 5/12

9:00 pm-11:40 am

1 stop15h 40m

$711
Quickest round-trip

Washington, D.C.Buenos Aires

DCA - EZE

DCAEZE

Washington, D.C. Reagan-National

Tue 4/28

4:34 pm-8:00 am

1 stop14h 26m

Buenos Aires Ministro Pistarini

Mon 5/11

9:00 pm-11:40 am

1 stop15h 40m

$711

Washington, D.C.Buenos Aires

DCA - EZE

DCAEZE

Washington, D.C. Reagan-National

Mon 4/20

3:00 pm-11:30 am

2 stops19h 30m

Buenos Aires Ministro Pistarini

Fri 4/24

12:15 pm-6:36 pm

2 stops31h 21m

$721

Washington, D.C.Buenos Aires

DCA - EZE

DCAEZE

Washington, D.C. Reagan-National

Mon 3/23

6:00 pm-9:00 am

1 stop14h 00m

Buenos Aires Ministro Pistarini

Thu 4/9

1:10 pm-11:10 am

2 stops23h 00m

$725

Washington, D.C.Buenos Aires

DCA - EZE

DCAEZE

Washington, D.C. Reagan-National

Tue 3/24

6:00 pm-9:00 am

1 stop14h 00m

Buenos Aires Ministro Pistarini

Thu 4/9

1:10 pm-11:10 am

2 stops23h 00m

$725

Washington, D.C.Buenos Aires

DCA - EZE

DCAEZE

Washington, D.C. Reagan-National

Mon 3/23

6:00 pm-9:00 am

1 stop14h 00m

Buenos Aires Ministro Pistarini

Fri 4/10

1:10 pm-2:00 pm

1 stop25h 50m

$730

Washington, D.C.Buenos Aires

DCA - AEP

DCAAEP

Washington, D.C. Reagan-National

Mon 5/11

5:00 pm-2:50 pm

2 stops20h 50m

Buenos Aires Jorge Newbery

Mon 5/18

7:20 pm-5:07 pm

2 stops22h 47m

$751

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/12

Showing 1-10 of 37 resultsSorted by cheapest first
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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 March.
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 $719). 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 March 16, 2026.
Read reviews from past customers who have flown Delta,LATAM Airlines, andUnited 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
8,292 reviews

Overall

7.9

Boarding

8.1

Entertainment

7.8

Comfort

7.9

Food

7.2

Crew

8.5

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
8,292 reviews
Delta
7.9
Good
8,292 reviews

Overall

7.9

Boarding

8.1

Entertainment

7.8

Comfort

7.9

Food

7.2

Crew

8.5

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
7.4
Good
1,918 reviews
Delta
7.9
Good
8,292 reviews

Overall

7.9

Boarding

8.1

Entertainment

7.8

Comfort

7.9

Food

7.2

Crew

8.5

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
9,428 reviews
Delta
7.9
Good
8,292 reviews

Overall

7.9

Boarding

8.1

Entertainment

7.8

Comfort

7.9

Food

7.2

Crew

8.5

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
7.1
Good
11,465 reviews
Delta
7.9
Good
8,292 reviews

Overall

7.9

Boarding

8.1

Entertainment

7.8

Comfort

7.9

Food

7.2

Crew

8.5

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 16h 25m. 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 LATAM Airlines is currently your cheapest option to Buenos Aires, with prices starting at $506. Additional round-trip tickets that might be worth considering are offered by American Airlines and United Airlines, with the lowest prices starting at $600 and $629, respectively. These flights start at 37% 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 $719). 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 March 16, 2026.
AirlineCheapestAverageFlexibilityOn-time
LATAM AirlinesCheapest$506Average$688FlexibilityNo cancel feeOn-time81%
American AirlinesCheapest$600Average$781FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$629Average$930FlexibilityNo cancel feeOn-time69%
DeltaCheapest$639Average$882FlexibilityNo cancel feeOn-timeN/A

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