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$275+ 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 12/7. Fares are subject to change and may not be available on all flights or dates of travel.
DCA — BUE
nov. 29 — dic. 61
sáb. 11/29
sáb. 12/6
1 adult, Economy
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Find 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 octubre 30, 2025.

This KAYAK deal was found by Cheapflights users on 10/28. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/111:10 amDCA - AEP
2 stops21h 20mLATAM Airlines
dom. 12/75:15 pmAEP - DCA
2 stops22h 44mLATAM Airlines
Deal found 10/28$640
This United Airlines deal was found by Cheapflights users on 10/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/182:51 pmDCA - EZE
1 stop16h 29mUnited Airlines
sáb. 11/2211:55 pmEZE - DCA
1 stop22h 50mUnited Airlines
Deal found 10/29$640
This American Airlines deal was found by Cheapflights users on 10/30. 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.
dom. 11/25:24 pmDCA - EZE
2 stops14h 46mAmerican Airlines
vie. 11/148:45 pmEZE - DCA
1 stop22h 11mAmerican Airlines
Deal found 10/30$644
This KAYAK deal was found by Cheapflights users on 10/28. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 11/196:00 amDCA - EZE
2 stops34h 43mLATAM Airlines
mar. 12/27:43 pmEZE - DCA
2 stops20h 16mLATAM Airlines
Deal found 10/28$646
This Delta deal was found by Cheapflights users on 10/29. 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.
sáb. 11/226:26 pmDCA - EZE
1 stop34h 54mDelta
mié. 12/38:55 pmEZE - DCA
1 stop14h 15mDelta
Deal found 10/29$647
This Expedia deal was found by Cheapflights users on 10/28. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/102:25 pmDCA - EZE
1 stop17h 10mLATAM Airlines
mié. 12/1711:00 amEZE - DCA
2 stops25h 05mLATAM Airlines
Deal found 10/28$669
This Travelocity deal was found by Cheapflights users on 10/29. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 11/1611:10 amDCA - AEP
2 stops21h 20mLATAM Airlines
lun. 11/243:40 pmAEP - DCA
2 stops24h 18mLATAM Airlines
Deal found 10/29$670
This Expedia deal was found by Cheapflights users on 10/29. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 11/22:40 pmDCA - EZE
2 stops58h 10mLATAM Airlines
mié. 11/54:05 amEZE - DCA
2 stops21h 36mLATAM Airlines
Deal found 10/29$678
This LATAM Airlines deal was found by Cheapflights users on 10/28. 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 LATAM Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/292:40 pmDCA - EZE
2 stops22h 20mLATAM Airlines
mar. 11/47:43 pmEZE - DCA
2 stops20h 02mLATAM Airlines
Deal found 10/28$681
This Cheapflightsfares deal was found by Cheapflights users on 10/27. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 11/1011:10 amDCA - EZE
2 stops29h 33mLATAM Airlines
mar. 2/104:05 amEZE - DCA
2 stops31h 09mLATAM Airlines
Deal found 10/27$689
This American Airlines deal was found by Cheapflights users on 10/28. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 11/205:15 pmDCA - EZE
1 stop15h 00mAmerican Airlines
jue. 12/411:20 pmEZE - DCA
1 stop13h 27mAmerican Airlines
Deal found 10/28$690
This KAYAK deal was found by Cheapflights users on 10/29. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 11/162:35 pmDCA - AEP
2 stops26h 05mLATAM Airlines
dom. 11/233:40 pmAEP - DCA
2 stops24h 20mLATAM Airlines
Deal found 10/29$697

Cheap 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 octubre 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$640
(KAYAK)

One-way from

$275
(FlightHub)

Popular in

December

Cheapest in

September

Average price

$689
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. 8% potential increase in price ($84 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($28 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
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 octubre 30, 2025.
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 - AEP

DCAAEP

Washington, D.C. Reagan-National

mar. 4/21

2:55 pm-2:40 pm

2 stops22h 45m

Buenos Aires Jorge Newbery

mié. 4/29

8:10 pm-2:05 pm

2 stops18h 55m

$640

Washington, D.C.Buenos Aires

DCA - EZE

DCAEZE

Washington, D.C. Reagan-National

lun. 1/26

6:00 pm-9:00 am

1 stop13h 00m

Buenos Aires Ministro Pistarini

lun. 2/2

8:55 pm-9:12 am

1 stop14h 17m

$640

Washington, D.C.Buenos Aires

DCA - EZE

DCAEZE

Washington, D.C. Reagan-National

mar. 11/11

12:50 pm-7:20 am

1 stop16h 30m

Buenos Aires Ministro Pistarini

mié. 11/19

10:05 pm-11:29 am

1 stop15h 24m

$640

Washington, D.C.Buenos Aires

DCA - AEP

DCAAEP

Washington, D.C. Reagan-National

mié. 4/22

6:25 pm-4:05 pm

2 stops20h 40m

Buenos Aires Jorge Newbery

mar. 4/28

8:10 pm-2:05 pm

2 stops18h 55m

$640

Washington, D.C.Buenos Aires

DCA - EZE

DCAEZE

Washington, D.C. Reagan-National

dom. 1/18

4:28 pm-9:20 am

1 stop14h 52m

Buenos Aires Ministro Pistarini

mar. 3/24

9:05 pm-6:44 pm

1 stop22h 39m

$640

Washington, D.C.Buenos Aires

DCA - EZE

DCAEZE

Washington, D.C. Reagan-National

mié. 4/15

6:25 pm-9:45 am

1 stop14h 20m

Buenos Aires Ministro Pistarini

lun. 4/27

7:45 am-2:05 pm

2 stops31h 20m

$640

Washington, D.C.Buenos Aires

DCA - AEP

DCAAEP

Washington, D.C. Reagan-National

dom. 4/19

2:55 pm-2:40 pm

2 stops22h 45m

Buenos Aires Jorge Newbery

dom. 4/26

5:00 pm-2:05 pm

2 stops22h 05m

$640

Washington, D.C.Buenos Aires

DCA - EZE

DCAEZE

Washington, D.C. Reagan-National

vie. 11/21

10:20 am-7:20 am

1 stop19h 00m

Buenos Aires Ministro Pistarini

mié. 12/3

8:55 pm-12:42 pm

1 stop17h 47m

$640

Washington, D.C.Buenos Aires

DCA - EZE

DCAEZE

Washington, D.C. Reagan-National

lun. 12/1

6:00 am-7:20 am

1 stop23h 20m

Buenos Aires Ministro Pistarini

dom. 12/7

11:55 pm-1:52 pm

1 stop15h 57m

$640

Washington, D.C.Buenos Aires

DCA - EZE

DCAEZE

Washington, D.C. Reagan-National

vie. 12/5

1:42 pm-7:20 am

1 stop15h 38m

Buenos Aires Ministro Pistarini

mar. 12/9

8:55 pm-9:10 am

1 stop14h 15m

$640

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

Showing 1-10 of 42 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 October.
ProviderPrice AccuracyTrust Score*
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
OvagoPrice Accuracy2 starsTrust Score*2 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars
oojoPrice 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. Reagan-National Airport-Buenos Aires flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Washington, D.C. Reagan-National Airport-Buenos Aires flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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 February is currently the most expensive (average of $1,145). 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 DCA to BUE?

Find hourly flight availability from Reagan-National 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 octubre 30, 2025.

One of the essential ways to save on airfare from Washington, D.C. Reagan-National Airport to Buenos Aires is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight in the morning could potentially save you up to 29% on airfare.

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 octubre 30, 2025.
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
7,993 reviews

Comfort

7.9

Entertainment

7.9

Crew

8.5

Overall

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Delta
7.9
Good
7,993 reviews
Delta
7.9
Good
7,993 reviews

Comfort

7.9

Entertainment

7.9

Crew

8.5

Overall

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
LATAM Airlines
7.5
Good
1,872 reviews
Delta
7.9
Good
7,993 reviews

Comfort

7.9

Entertainment

7.9

Crew

8.5

Overall

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
United Airlines
7.4
Good
8,998 reviews
Delta
7.9
Good
7,993 reviews

Comfort

7.9

Entertainment

7.9

Crew

8.5

Overall

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
American Airlines
7.2
Good
11,030 reviews
Delta
7.9
Good
7,993 reviews

Comfort

7.9

Entertainment

7.9

Crew

8.5

Overall

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.

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 13h. 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 United Airlines and American Airlines, with the lowest prices starting at $629 and $639, respectively. These flights start at 45% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from Washington, D.C. Reagan-National Airport to Buenos Aires one-way?

    For one-way options, check prices for LATAM Airlines. According to our data, you can fly for as low as $275. Users have also found prices from $275 and $275 on Delta and United Airlines, respectively.

  • 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 February is currently the most expensive (average of $1,145). 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 octubre 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
LATAM AirlinesCheapest$506Average$687FlexibilityNo cancel feeOn-time81%
United AirlinesCheapest$629Average$1,047FlexibilityNo cancel feeOn-time69%
DeltaCheapest$639Average$1,037FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$639Average$1,044FlexibilityNo cancel feeOn-time71%

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