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Cheap flights from Washington, D.C. to Buenos Aires from $271

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. to Buenos Aires departing on 11/19. 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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Cheap round-trip flights

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Copa Airlines Logo
1:13 am - 10:31 pmIAD-EZE
19h 18m1 stop
Copa Airlines Logo
5:16 am - 11:33 pmEZE-IAD
20h 17m1 stop
$628Copa Airlines
Find Deal
Sun, Nov 9 - Sun, Nov 23
American Airlines Logo
7:59 am - 7:00 amIAD-EZE
21h 01m2 stops
American Airlines Logo
8:45 pm - 1:35 pmEZE-IAD
18h 50m2 stops
$632American Airlines
Find Deal
Mon, Nov 10 - Sun, Nov 23
Avianca Logo
2:35 pm - 5:40 amIAD-AEP
13h 05m1 stop
Avianca Logo
7:00 am - 4:25 amAEP-IAD
23h 25m1 stop
$637Avianca
Find Deal
Sun, Nov 16 - Sun, Nov 23
Avianca Logo
2:35 pm - 5:50 amIAD-EZE
13h 15m1 stop
Avianca Logo
1:40 am - 3:10 amEZE-IAD
27h 30m2 stops
$637Avianca
Find Deal
Tue, Nov 11 - Tue, Nov 18
Delta Logo
3:35 pm - 9:00 amIAD-EZE
15h 25m1 stop
Delta Logo
8:55 pm - 2:40 pmEZE-IAD
19h 45m1 stop
$640Delta
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Tue, Nov 18 - Wed, Dec 3
United Airlines Logo
6:00 am - 9:20 amBWI-EZE
25h 20m1 stop
United Airlines Logo
11:55 pm - 4:15 pmEZE-BWI
18h 20m1 stop
$640United Airlines
Find Deal
Sun, Nov 16 - Tue, Dec 9
United Airlines Logo
2:51 pm - 7:20 amDCA-EZE
14h 29m1 stop
United Airlines Logo
10:05 pm - 11:32 amEZE-DCA
15h 27m1 stop
$640United Airlines
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Tue, Nov 18 - Tue, Dec 2
LATAM Airlines Logo
12:11 pm - 10:30 amIAD-AEP
20h 19m2 stops
LATAM Airlines Logo
3:40 pm - 11:31 amAEP-IAD
21h 51m2 stops
$640LATAM Airlines
Find Deal
Tue, Nov 18 - Sat, Nov 22
LATAM Airlines Logo
2:55 pm - 6:40 pmDCA-AEP
26h 45m2 stops
LATAM Airlines Logo
5:00 pm - 2:06 pmAEP-DCA
22h 06m2 stops
$640LATAM Airlines
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Sun, Mar 22 - Tue, Mar 31
Delta Logo
12:15 pm - 5:55 amBWI-EZE
16h 40m2 stops
Delta Logo
7:45 am - 12:15 amEZE-BWI
17h 30m2 stops
$646Delta
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Tue, Apr 14 - Tue, Apr 28

United Airlines flights from Washington, D.C. to Buenos Aires

Our best United Airlines deals on Washington, D.C. to Buenos Aires flight tickets
United Airlines
Nov 16
BWI6:00 amBaltimore/Washington
25h 20m
1 stop
EZE9:20 amBuenos Aires Ministro Pistarini
Dec 9
EZE11:55 pmBuenos Aires Ministro Pistarini
18h 20m
1 stop
BWI4:15 pmBaltimore/Washington
$640
Find similar
United Airlines
Nov 22
BWI6:16 pmBaltimore/Washington
37h 04m
1 stop
EZE9:20 amBuenos Aires Ministro Pistarini
Dec 2
EZE11:55 pmBuenos Aires Ministro Pistarini
18h 20m
1 stop
BWI4:15 pmBaltimore/Washington
$648
Find similar
United Airlines
Feb 8
IAD8:15 amWashington, D.C. Dulles Intl
23h 05m
1 stop
EZE9:20 amBuenos Aires Ministro Pistarini
Feb 23
EZE10:05 pmBuenos Aires Ministro Pistarini
15h 21m
1 stop
IAD11:26 amWashington, D.C. Dulles Intl
$675
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Delta flights from Washington, D.C. to Buenos Aires

Our best Delta deals on Washington, D.C. to Buenos Aires flight tickets
Delta
Nov 5
DCA11:10 amWashington, D.C. Reagan-National
21h 05m
1 stop
EZE10:15 amBuenos Aires Ministro Pistarini
Nov 12
EZE8:55 pmBuenos Aires Ministro Pistarini
14h 15m
1 stop
DCA9:10 amWashington, D.C. Reagan-National
$640
Find similar
Delta
Apr 14
BWI12:15 pmBaltimore/Washington
16h 40m
2 stops
EZE5:55 amBuenos Aires Ministro Pistarini
Apr 28
EZE7:45 amBuenos Aires Ministro Pistarini
17h 30m
2 stops
BWI12:15 amBaltimore/Washington
$646
Find similar
Delta
Nov 20
IAD7:21 pmWashington, D.C. Dulles Intl
33h 59m
1 stop
EZE7:20 amBuenos Aires Ministro Pistarini
Dec 2
EZE8:55 pmBuenos Aires Ministro Pistarini
14h 16m
1 stop
IAD9:11 amWashington, D.C. Dulles Intl
$647
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Washington, D.C. 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 October 30, 2025.
Use the filters below to find and compare flights from Washington, D.C. to Buenos Aires that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Sun 11/9

1:13 am-10:31 pm

1 stop19h 18m

Buenos Aires Ministro Pistarini

Sun 11/23

5:16 am-11:33 pm

1 stop20h 17m

$628

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Mon 11/10

7:59 am-7:00 am

2 stops21h 01m

Buenos Aires Ministro Pistarini

Sun 11/23

8:45 pm-1:35 pm

2 stops18h 50m

$632

Washington, D.C.Buenos Aires

IAD - AEP

IADAEP

Washington, D.C. Dulles Intl

Sun 11/16

2:35 pm-5:40 am

1 stop13h 05m

Buenos Aires Jorge Newbery

Sun 11/23

7:00 am-4:25 am

1 stop23h 25m

$637

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Tue 11/11

2:35 pm-5:50 am

1 stop13h 15m

Buenos Aires Ministro Pistarini

Tue 11/18

1:40 am-3:10 am

2 stops27h 30m

$637

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Tue 11/18

3:35 pm-9:00 am

1 stop15h 25m

Buenos Aires Ministro Pistarini

Wed 12/3

8:55 pm-2:40 pm

1 stop19h 45m

$640

BaltimoreBuenos Aires

BWI - EZE

BWIEZE

Baltimore/Washington

Sun 11/16

6:00 am-9:20 am

1 stop25h 20m

Buenos Aires Ministro Pistarini

Tue 12/9

11:55 pm-4:15 pm

1 stop18h 20m

$640

Washington, D.C.Buenos Aires

DCA - EZE

DCAEZE

Washington, D.C. Reagan-National

Tue 11/18

2:51 pm-7:20 am

1 stop14h 29m

Buenos Aires Ministro Pistarini

Tue 12/2

10:05 pm-11:32 am

1 stop15h 27m

$640

Washington, D.C.Buenos Aires

IAD - AEP

IADAEP

Washington, D.C. Dulles Intl

Tue 11/18

12:11 pm-10:30 am

2 stops20h 19m

Buenos Aires Jorge Newbery

Sat 11/22

3:40 pm-11:31 am

2 stops21h 51m

$640

Washington, D.C.Buenos Aires

DCA - AEP

DCAAEP

Washington, D.C. Reagan-National

Sun 3/22

2:55 pm-6:40 pm

2 stops26h 45m

Buenos Aires Jorge Newbery

Tue 3/31

5:00 pm-2:06 pm

2 stops22h 06m

$640

BaltimoreBuenos Aires

BWI - EZE

BWIEZE

Baltimore/Washington

Tue 4/14

12:15 pm-5:55 am

2 stops16h 40m

Buenos Aires Ministro Pistarini

Tue 4/28

7:45 am-12:15 am

2 stops17h 30m

$646

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. 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 typical price of a round-trip flight between Washington, D.C. and Buenos Aires?

What is the cheapest month to fly to Buenos Aires?

The cheapest month to fly to Buenos Aires from Washington, D.C. is in August. Flight prices, which tend to average around $641, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of August, then book flights to Buenos Aires from Washington, D.C. during September instead. Flights to Buenos Aires in September, while not as cheap as those in August, still average around $647.

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. 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. 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. when booking weeks ahead of your departure date. In general, you can expect to find flights to Buenos Aires for around $878 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. for as low as $769 on momondo.

How have Washington, D.C. to Buenos Aires flight prices changed over time?

As of October 2025, prices for Washington, D.C. to Buenos Aires flights are approximately 29% cheaper when compared to flights at the same time last year.

When to book flights from Washington, D.C. to Buenos Aires

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. 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. to Buenos Aires (WAS to BUE) flight deals and tips

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

Direct flights

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

    Buenos Aires is 5214.3 mi away from Washington, D.C.. 13h 05m is a normal flight duration for this route.

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

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

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

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Washington, D.C. to Buenos Aires.

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

    The travel and health documents you'll need for your trip to Buenos Aires may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Buenos Aires. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

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

Best airlines flying from Washington, D.C. to Buenos Aires

Compare and see reviews for airlines that fly from Washington, D.C. to Buenos Aires with momondo
Airline
Rating
Free Cancellation
Price
LATAM AirlinesPriceFrom $506Free CancellationRating
7.5
1,872 reviews
Search LATAM Airlines flights
AviancaPriceFrom $600Free CancellationRating
6.6
2,467 reviews
Search Avianca flights
Copa AirlinesPriceFrom $617Free CancellationRating
7.6
1,563 reviews
Search Copa Airlines flights
United AirlinesPriceFrom $629Free CancellationRating
7.4
8,998 reviews
Search United Airlines flights
DeltaPriceFrom $629Free CancellationRating
7.9
7,993 reviews
Search Delta flights
American AirlinesPriceFrom $639Free CancellationRating
7.2
11,030 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 collates all your flight options in one place and lets you filter them to find the perfect flight from Washington, D.C. to Buenos Aires. momondo saves you time and could save you money on your trip.

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

All flight searches from Washington, D.C. to Buenos Aires on momondo can be filtered to show those which offer flexible booking policies.

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

momondo provides multiple filters to help you find the best flight to Buenos Aires from Washington, D.C.. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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 simply researching potential flights to Buenos Aires, momondo offers a useful price alert feature which will track prices for flights to Buenos Aires from Washington, D.C. and alert you 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