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Buenos Aires

$304+ 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 7/15. Fares are subject to change and may not be available on all flights or dates of travel.
DCA — BUE
Jun 15 — Jun 221
Mon 6/15
Mon 6/22
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 May 16, 2026.

This LATAM Airlines deal was found by Cheapflights users on 5/14. 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 LATAM Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/132:55 pm
DCA
-
EZE
1 stop17h 45m
LATAM Airlines
Sat 6/2710:40 pm
EZE
-
DCA
1 stop16h 25m
LATAM Airlines
Deal found 5/14$654
This LATAM Airlines deal was found by Cheapflights users on 5/14. 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 LATAM Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/152:45 pm
DCA
-
EZE
1 stop17h 55m
LATAM Airlines
Mon 6/298:10 pm
EZE
-
DCA
1 stop14h 05m
LATAM Airlines
Deal found 5/14$667
This LATAM Airlines deal was found by Cheapflights users on 5/15. 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 LATAM Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/112:45 pm
DCA
-
EZE
1 stop17h 55m
LATAM Airlines
Mon 6/1510:40 pm
EZE
-
DCA
2 stops15h 02m
LATAM Airlines
Deal found 5/15$670
This LATAM Airlines deal was found by Cheapflights users on 5/13. 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 LATAM Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/172:45 pm
DCA
-
EZE
1 stop17h 55m
LATAM Airlines
Mon 6/221:10 pm
EZE
-
DCA
2 stops22h 57m
LATAM Airlines
Deal found 5/13$671
This KAYAK deal was found by Cheapflights users on 5/12. 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.
Mon 6/82:45 pm
DCA
-
EZE
1 stop17h 55m
LATAM Airlines
Mon 6/1510:40 pm
EZE
-
DCA
1 stop16h 25m
LATAM Airlines
Deal found 5/12$679
This LATAM Airlines deal was found by Cheapflights users on 5/13. 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 LATAM Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/122:45 pm
DCA
-
EZE
1 stop17h 55m
LATAM Airlines
Tue 6/168:30 pm
EZE
-
DCA
2 stops21h 29m
LATAM Airlines
Deal found 5/13$680
This LATAM Airlines deal was found by Cheapflights users on 5/14. 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 LATAM Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/172:00 pm
DCA
-
EZE
2 stops27h 21m
LATAM Airlines
Tue 9/81:10 pm
EZE
-
DCA
2 stops22h 46m
LATAM Airlines
Deal found 5/14$684
This CheapOair deal was found by Cheapflights users on 5/13. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/142:45 pm
DCA
-
EZE
1 stop17h 55m
LATAM Airlines
Sun 6/218:10 pm
EZE
-
DCA
1 stop23h 20m
LATAM Airlines
Deal found 5/13$688
This KAYAK deal was found by Cheapflights users on 5/13. 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.
Fri 8/1411:00 am
DCA
-
AEP
2 stops19h 40m
LATAM Airlines
Tue 8/259:00 pm
AEP
-
DCA
2 stops18h 05m
LATAM Airlines
Deal found 5/13$693
This United Airlines deal was found by Cheapflights users on 5/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/912:52 pm
DCA
-
EZE
1 stop18h 08m
United Airlines
Tue 8/119:00 pm
EZE
-
DCA
1 stop22h 26m
United Airlines
Deal found 5/14$693
This LATAM Airlines deal was found by Cheapflights users on 5/13. 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 LATAM Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/142:00 pm
DCA
-
EZE
1 stop18h 40m
LATAM Airlines
Tue 8/257:21 pm
EZE
-
DCA
2 stops19h 44m
LATAM Airlines
Deal found 5/13$694
This KAYAK deal was found by Cheapflights users on 5/14. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/122:45 pm
DCA
-
EZE
2 stops19h 45m
LATAM Airlines
Mon 6/2210:40 pm
EZE
-
DCA
2 stops20h 50m
LATAM Airlines
Deal found 5/14$697

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 May 16, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$654
(LATAM Airlines)

One-way from

$304
(123 Milhas)

Popular in

July

Cheapest in

September

Average price

$759
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. 10% potential increase in price ($104 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($24 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 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 May 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
Quickest round-trip

Washington, D.C.Buenos Aires

DCA - EZE

DCAEZE

Washington, D.C. Reagan-National

Mon 7/20

7:37 pm-9:45 am

1 stop13h 08m

Buenos Aires Ministro Pistarini

Mon 7/27

8:10 pm-11:27 am

1 stop16h 17m

$693

Washington, D.C.Buenos Aires

DCA - EZE

DCAEZE

Washington, D.C. Reagan-National

Tue 7/14

7:15 am-8:00 am

2 stops23h 45m

Buenos Aires Ministro Pistarini

Mon 8/10

9:00 pm-11:54 am

1 stop15h 54m

$693

Washington, D.C.Buenos Aires

DCA - EZE

DCAEZE

Washington, D.C. Reagan-National

Fri 6/12

2:45 pm-6:21 pm

2 stops26h 36m

Buenos Aires Ministro Pistarini

Tue 6/16

12:15 pm-4:59 pm

2 stops29h 44m

$693

Washington, D.C.Buenos Aires

DCA - EZE

DCAEZE

Washington, D.C. Reagan-National

Sun 7/19

7:00 am-9:45 am

1 stop25h 45m

Buenos Aires Ministro Pistarini

Sun 7/26

8:10 pm-11:27 am

1 stop16h 17m

$700

Washington, D.C.Buenos Aires

DCA - EZE

DCAEZE

Washington, D.C. Reagan-National

Mon 8/17

10:58 am-8:00 am

1 stop20h 02m

Buenos Aires Ministro Pistarini

Tue 9/8

9:00 pm-11:54 am

1 stop15h 54m

$707

Washington, D.C.Buenos Aires

DCA - EZE

DCAEZE

Washington, D.C. Reagan-National

Mon 7/6

7:28 pm-8:00 am

1 stop35h 32m

Buenos Aires Ministro Pistarini

Wed 7/15

9:00 pm-11:56 am

1 stop15h 56m

$716

Washington, D.C.Buenos Aires

DCA - AEP

DCAAEP

Washington, D.C. Reagan-National

Wed 10/21

2:55 pm-4:00 pm

2 stops24h 05m

Buenos Aires Jorge Newbery

Tue 11/3

3:40 pm-10:54 am

2 stops21h 14m

$721

Washington, D.C.Buenos Aires

DCA - AEP

DCAAEP

Washington, D.C. Reagan-National

Sun 10/11

2:55 pm-2:50 pm

2 stops22h 55m

Buenos Aires Jorge Newbery

Sat 10/17

3:45 pm-1:56 pm

2 stops23h 11m

$721

Washington, D.C.Buenos Aires

DCA - AEP

DCAAEP

Washington, D.C. Reagan-National

Fri 10/9

2:55 pm-9:30 pm

2 stops29h 35m

Buenos Aires Jorge Newbery

Sun 10/18

3:45 pm-1:56 pm

2 stops23h 11m

$721

Washington, D.C.Buenos Aires

DCA - AEP

DCAAEP

Washington, D.C. Reagan-National

Tue 9/29

6:25 pm-4:00 pm

2 stops20h 35m

Buenos Aires Jorge Newbery

Mon 10/5

8:05 pm-1:56 pm

2 stops18h 51m

$721

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/12

Showing 1-10 of 47 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 May.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
ExpediaPrice Accuracy1 starTrust Score*3 stars
OvagoPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
oojoPrice Accuracy3 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, November is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to Buenos Aires (average of $275). 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.

How much does it cost to fly round-trip from Washington, D.C. Reagan-National Airport to Buenos Aires?

What’s the top layover airport for flights from Washington, D.C. Reagan-National Airport to Buenos Aires?

Share of 1-stop round-trip flights from Washington, D.C. Reagan-National Airport to Buenos Aires chosen by Cheapflights users in the past 12 months, using the same layover each way.

Houston (IAH) – chosen by Cheapflights users on 50% of 1-stop itineraries from Washington, D.C. Reagan-National Airport to Buenos Aires on Cheapflights.

What’s the cheapest layover airport for flights from Washington, D.C. Reagan-National Airport to Buenos Aires?

Average round-trip fare for 1-stop flights from Washington, D.C. Reagan-National Airport to Buenos Aires, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Atlanta (ATL) is the most affordable 1-stop option, with an average round-trip price of $876.

What’s the fastest layover option from Washington, D.C. Reagan-National Airport to Buenos Aires?

Shortest average travel time for 1-stop one-way flights from Washington, D.C. Reagan-National Airport 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. Reagan-National Airport to Buenos Aires?

Average layover duration for 1-stop one-way flights from Washington, D.C. Reagan-National Airport to Buenos Aires, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Atlanta (ATL) offer the fastest connection on this route, with an average layover time of 1h 40m.

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 May 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
8,455 reviews

Comfort

7.8

Overall

7.9

Entertainment

7.8

Crew

8.5

Food

7.2

Boarding

8.1

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
7.9
Good
8,455 reviews
Delta
7.9
Good
8,455 reviews

Comfort

7.8

Overall

7.9

Entertainment

7.8

Crew

8.5

Food

7.2

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
LATAM Airlines
7.4
Good
1,923 reviews
Delta
7.9
Good
8,455 reviews

Comfort

7.8

Overall

7.9

Entertainment

7.8

Crew

8.5

Food

7.2

Boarding

8.1

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
9,727 reviews
Delta
7.9
Good
8,455 reviews

Comfort

7.8

Overall

7.9

Entertainment

7.8

Crew

8.5

Food

7.2

Boarding

8.1

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
11,664 reviews
Delta
7.9
Good
8,455 reviews

Comfort

7.8

Overall

7.9

Entertainment

7.8

Crew

8.5

Food

7.2

Boarding

8.1

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 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 22h 55m. Airlines will cover a distance of 5207 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 $599, respectively. These flights start at 68% 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, November is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to Buenos Aires (average of $275). 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 May 16, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$274Average$791FlexibilityNo cancel feeOn-timeN/A
LATAM AirlinesCheapest$506Average$719FlexibilityNo cancel feeOn-time81%
American AirlinesCheapest$599Average$689FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$629Average$870FlexibilityNo cancel feeOn-time69%

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