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Cheap flights from Washington, D.C. Reagan-National Airport to Buenos Aires from $275

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. Reagan-National Airport to Buenos Aires departing on 11/28. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Washington, D.C. Reagan-National Airport to Buenos Aires

Cheap round-trip flights

Enter your travel dates to find the best prices.
LATAM Airlines Logo
2:55 pm - 6:40 pmDCA-AEP
26h 45m2 stops
LATAM Airlines Logo
8:10 pm - 2:05 pmAEP-DCA
18h 55m2 stops
$640LATAM Airlines
Find Deal
lun., mar. 23 - lun., abr. 13
United Airlines Logo
8:15 am - 9:20 amDCA-EZE
23h 05m1 stop
United Airlines Logo
10:05 pm - 11:32 amEZE-DCA
15h 27m1 stop
$640United Airlines
Find Deal
mar., nov. 18 - vie., dic. 12
LATAM Airlines Logo
2:35 pm - 9:35 amDCA-EZE
17h 00m1 stop
LATAM Airlines Logo
7:45 am - 2:06 pmEZE-DCA
31h 21m3 stops
$643LATAM Airlines
Find Deal
jue., ene. 8 - mar., mar. 10
LATAM Airlines Logo
3:40 pm - 9:35 amDCA-EZE
15h 55m2 stops
LATAM Airlines Logo
7:45 am - 11:34 pmEZE-DCA
17h 49m2 stops
$644LATAM Airlines
Find Deal
jue., ene. 8 - jue., ene. 29
Delta Logo
7:35 pm - 7:20 amDCA-EZE
33h 45m1 stop
Delta Logo
8:55 pm - 9:10 amEZE-DCA
14h 15m1 stop
$647Delta
Find Deal
jue., nov. 20 - mié., dic. 3
American Airlines Logo
12:26 pm - 10:40 amDCA-EZE
20h 14m1 stop
American Airlines Logo
11:20 pm - 10:47 amEZE-DCA
13h 27m1 stop
$690American Airlines
Find Deal
jue., nov. 20 - jue., dic. 4
American Airlines Logo
5:24 pm - 10:15 amDCA-EZE
14h 51m2 stops
American Airlines Logo
11:59 pm - 12:42 pmEZE-DCA
14h 43m1 stop
$701American Airlines
Find Deal
mié., nov. 26 - lun., dic. 1
Delta Logo
6:00 pm - 7:20 amDCA-EZE
35h 20m1 stop
Delta Logo
8:00 am - 11:34 pmEZE-DCA
17h 34m2 stops
$704Delta
Find Deal
sáb., feb. 14 - vie., feb. 20
Multiple Airlines Logo
8:40 pm - 6:40 pmDCA-AEP
20h 00m2 stops
Multiple Airlines Logo
3:40 pm - 9:58 pmAEP-DCA
32h 18m3 stops
$1,034Multiple Airlines
Find Deal
lun., feb. 2 - vie., feb. 13
Multiple Airlines Logo
6:59 am - 6:40 pmDCA-AEP
33h 41m2 stops
Multiple Airlines Logo
3:40 pm - 9:58 pmAEP-DCA
32h 18m3 stops
$1,069Multiple Airlines
Find Deal
dom., feb. 1 - vie., feb. 13

United Airlines flights from Washington, D.C. Reagan-National Airport to Buenos Aires

Our best United Airlines deals on Washington, D.C. Reagan-National Airport to Buenos Aires flight tickets
United Airlines
Nov 18
DCA8:15 amWashington, D.C. Reagan-National
23h 05m
1 stop
EZE9:20 amBuenos Aires Ministro Pistarini
Dec 12
EZE10:05 pmBuenos Aires Ministro Pistarini
15h 27m
1 stop
DCA11:32 amWashington, D.C. Reagan-National
$640
Find similar
United Airlines
Nov 21
DCA7:59 pmWashington, D.C. Reagan-National
35h 21m
1 stop
EZE9:20 amBuenos Aires Ministro Pistarini
Dec 2
EZE11:55 pmBuenos Aires Ministro Pistarini
15h 57m
1 stop
DCA1:52 pmWashington, D.C. Reagan-National
$648
Find similar
United Airlines
Feb 1
DCA2:45 pmWashington, D.C. Reagan-National
16h 35m
1 stop
EZE9:20 amBuenos Aires Ministro Pistarini
Feb 9
EZE11:55 pmBuenos Aires Ministro Pistarini
20h 46m
1 stop
DCA6:41 pmWashington, D.C. Reagan-National
$660
Find similar

LATAM Airlines flights from Washington, D.C. Reagan-National Airport to Buenos Aires

Our best LATAM Airlines deals on Washington, D.C. Reagan-National Airport to Buenos Aires flight tickets
LATAM Airlines
Mar 23
DCA2:55 pmWashington, D.C. Reagan-National
26h 45m
2 stops
AEP6:40 pmBuenos Aires Jorge Newbery
Apr 13
AEP8:10 pmBuenos Aires Jorge Newbery
18h 55m
2 stops
DCA2:05 pmWashington, D.C. Reagan-National
$640
Find similar
LATAM Airlines
Jan 8
DCA2:35 pmWashington, D.C. Reagan-National
17h 00m
1 stop
EZE9:35 amBuenos Aires Ministro Pistarini
Mar 10
EZE7:45 amBuenos Aires Ministro Pistarini
31h 21m
3 stops
DCA2:06 pmWashington, D.C. Reagan-National
$643
Find similar
LATAM Airlines
Jan 8
DCA3:40 pmWashington, D.C. Reagan-National
15h 55m
2 stops
EZE9:35 amBuenos Aires Ministro Pistarini
Jan 29
EZE7:45 amBuenos Aires Ministro Pistarini
17h 49m
2 stops
DCA11:34 pmWashington, D.C. Reagan-National
$644
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Washington, D.C. Reagan-National Airport 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, momondo users made 832,500 searches. Data last updated noviembre 3, 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

Fly to

Route

Depart

Return

Price

Washington, D.C.Buenos Aires

DCA - AEP

DCAAEP

Washington, D.C. Reagan-National

lun. 3/23

2:55 pm-6:40 pm

2 stops26h 45m

Buenos Aires Jorge Newbery

lun. 4/13

8:10 pm-2:05 pm

2 stops18h 55m

$640

Washington, D.C.Buenos Aires

DCA - EZE

DCAEZE

Washington, D.C. Reagan-National

mar. 11/18

8:15 am-9:20 am

1 stop23h 05m

Buenos Aires Ministro Pistarini

vie. 12/12

10:05 pm-11:32 am

1 stop15h 27m

$640

Washington, D.C.Buenos Aires

DCA - EZE

DCAEZE

Washington, D.C. Reagan-National

jue. 1/8

2:35 pm-9:35 am

1 stop17h 00m

Buenos Aires Ministro Pistarini

mar. 3/10

7:45 am-2:06 pm

3 stops31h 21m

$643

Washington, D.C.Buenos Aires

DCA - EZE

DCAEZE

Washington, D.C. Reagan-National

jue. 1/8

3:40 pm-9:35 am

2 stops15h 55m

Buenos Aires Ministro Pistarini

jue. 1/29

7:45 am-11:34 pm

2 stops17h 49m

$644

Washington, D.C.Buenos Aires

DCA - EZE

DCAEZE

Washington, D.C. Reagan-National

jue. 11/20

7:35 pm-7:20 am

1 stop33h 45m

Buenos Aires Ministro Pistarini

mié. 12/3

8:55 pm-9:10 am

1 stop14h 15m

$647

Washington, D.C.Buenos Aires

DCA - EZE

DCAEZE

Washington, D.C. Reagan-National

jue. 11/20

12:26 pm-10:40 am

1 stop20h 14m

Buenos Aires Ministro Pistarini

jue. 12/4

11:20 pm-10:47 am

1 stop13h 27m

$690

Washington, D.C.Buenos Aires

DCA - EZE

DCAEZE

Washington, D.C. Reagan-National

mié. 11/26

5:24 pm-10:15 am

2 stops14h 51m

Buenos Aires Ministro Pistarini

lun. 12/1

11:59 pm-12:42 pm

1 stop14h 43m

$701

Washington, D.C.Buenos Aires

DCA - EZE

DCAEZE

Washington, D.C. Reagan-National

sáb. 2/14

6:00 pm-7:20 am

1 stop35h 20m

Buenos Aires Ministro Pistarini

vie. 2/20

8:00 am-11:34 pm

2 stops17h 34m

$704

Washington, D.C.Buenos Aires

DCA - AEP

DCAAEP

Washington, D.C. Reagan-National

lun. 2/2

8:40 pm-6:40 pm

2 stops20h 00m

Buenos Aires Jorge Newbery

vie. 2/13

3:40 pm-9:58 pm

3 stops32h 18m

$1,034

Washington, D.C.Buenos Aires

DCA - AEP

DCAAEP

Washington, D.C. Reagan-National

dom. 2/1

6:59 am-6:40 pm

2 stops33h 41m

Buenos Aires Jorge Newbery

vie. 2/13

3:40 pm-9:58 pm

3 stops32h 18m

$1,069

Flights are sorted by cheapest round-trip flights first.

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See travel insights to Buenos Aires from

How to get the cheapest flight ticket from Washington, D.C. Reagan-National Airport to Buenos Aires

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Buenos Aires?

The cheapest month to fly to Buenos Aires from Washington, D.C. Reagan-National Airport is in September. Flight prices, which tend to average around $639, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of September, then book flights to Buenos Aires from Washington, D.C. Reagan-National Airport during October instead. Flights to Buenos Aires in October, while not as cheap as those in September, still average around $689.

What is the cheapest day to depart on your flight to Buenos Aires?

On average, the least expensive day to fly to Buenos Aires from Washington, D.C. Reagan-National Airport is on a Monday. momondo users have found tickets for Monday departures for as low as $1,031. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Saturday as prices are generally higher than usual. According to our data, the average ticket price to Buenos Aires on Saturday is $1,094.

What is the cheapest time of day to depart on your flight to Buenos Aires?

Our most recent data shows that the best time of day to fly to Buenos Aires is in the morning. Flights from Washington, D.C. Reagan-National Airport to Buenos Aires during this time can be as low as $969. Try not to purchase tickets at noon because they tend to be around $1,107. Of course, these prices can vary depending on the time of year and what airport you fly to.

How far in advance should I book a flight to Buenos Aires?

You are more likely to see cheaper flights to Buenos Aires from Washington, D.C. Reagan-National Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Buenos Aires for around $999 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Buenos Aires from Washington, D.C. Reagan-National Airport for as low as $714 on momondo.

When to book flights from Washington, D.C. Reagan-National Airport to Buenos Aires

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. Reagan-National Airport to Buenos Aires according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Washington, D.C. Reagan-National Airport to Buenos Aires (DCA to BUE) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. Reagan-National Airport to Buenos Aires

Direct flights

None
There are no direct flights from Washington, D.C. Reagan-National Airport to Buenos Aires. There are no popular flight routes from Washington, D.C. Reagan-National Airport to Buenos Aires.
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  • How far is Washington, D.C. Reagan-National to Buenos Aires by plane?

    The straight-line distance from Washington, D.C. Reagan-National to Buenos Aires is 5210.8 mi. A reasonable flight in good conditions will take 14h 29m.

  • When did momondo last update prices for flights from Washington, D.C. Reagan-National Airport to Buenos Aires?

    Prices for flights from Washington, D.C. Reagan-National Airport to Buenos Aires are refreshed on a daily basis.

  • How many operators does momondo search for flights from Washington, D.C. Reagan-National Airport to Buenos Aires?

  • How old do you have to be to fly from Washington, D.C. Reagan-National Airport to Buenos Aires?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington, D.C. Reagan-National Airport to Buenos Aires.

  • What documentation or ID do you need to fly to Buenos Aires?

    The necessary travel and health documents for your Buenos Aires trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Washington, D.C. Reagan-National Airport to Buenos Aires?

Best airlines flying from Washington, D.C. Reagan-National Airport to Buenos Aires

Compare and see reviews for airlines that fly from Washington, D.C. Reagan-National Airport to Buenos Aires with momondo
Airline
Rating
Free Cancellation
Price
LATAM AirlinesPriceFrom $506Free CancellationRating
7.5
1,873 reviews
Search LATAM Airlines flights
United AirlinesPriceFrom $629Free CancellationRating
7.4
8,997 reviews
Search United Airlines flights
DeltaPriceFrom $639Free CancellationRating
7.9
8,001 reviews
Search Delta flights
American AirlinesPriceFrom $639Free CancellationRating
7.2
11,036 reviews
Search American Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Washington, D.C. to Buenos Aires?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Washington, D.C. to Buenos Aires. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Washington, D.C. to Buenos Aires with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Buenos Aires from Washington, D.C. with this policy.

How can momondo help me find flights from Washington, D.C. to Buenos Aires?

Once all potential Washington, D.C. to Buenos Aires flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Washington, D.C. to Buenos Aires right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Washington, D.C. to Buenos Aires now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Buenos Aires and let you know when they change.

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Find better results for your trip to Argentina

Fly into one of these airports located in Buenos Aires

Airports listed have a maximum distance of 17.0 mi from Buenos Aires
Buenos Aires Jorge Newbery Airport
Buenos Aires Ministro Pistarini Airport