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Cheap flights from Washington, D.C. to Buenos Aires from $251

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 4/16. 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. to Buenos Aires

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
3:21 pm - 8:20 am
BWI
-
EZE
14h 59m
1 stop
American Airlines Logo
10:25 pm - 2:30 pm
EZE
-
BWI
18h 05m
1 stop
$599American Airlines
Thu, Feb 26 - Sun, Mar 1
Copa Airlines Logo
4:35 pm - 10:58 pm
IAD
-
EZE
29h 23m
1 stop
Copa Airlines Logo
9:16 am - 4:15 am
EZE
-
IAD
19h 59m
1 stop
$600Copa Airlines
Wed, Mar 18 - Wed, Mar 25
United Airlines Logo
6:03 am - 7:20 am
IAD
-
EZE
23h 17m
1 stop
United Airlines Logo
10:05 pm - 11:26 am
EZE
-
IAD
15h 21m
1 stop
$601United Airlines
Thu, Feb 26 - Mon, Mar 2
United Airlines Logo
12:47 pm - 7:20 am
DCA
-
EZE
16h 33m
1 stop
United Airlines Logo
11:55 pm - 3:55 pm
EZE
-
DCA
18h 00m
1 stop
$601United Airlines
Thu, Feb 26 - Mon, Mar 2
American Airlines Logo
11:31 am - 8:50 am
BWI
-
EZE
20h 19m
1 stop
American Airlines Logo
8:40 pm - 10:51 am
EZE
-
BWI
15h 11m
1 stop
$601American Airlines
Sun, Apr 19 - Mon, Apr 27
Avianca Logo
6:50 am - 5:40 am
IAD
-
EZE
21h 50m
1 stop
Avianca Logo
7:10 am - 5:20 am
EZE
-
IAD
23h 10m
1 stop
$603Avianca
Fri, Apr 3 - Thu, Apr 30
Copa Airlines Logo
4:45 pm - 7:55 am
BWI
-
EZE
14h 10m
1 stop
Copa Airlines Logo
2:31 am - 3:11 pm
EZE
-
BWI
13h 40m
1 stop
$604Copa Airlines
Wed, Mar 18 - Tue, Mar 24
Avianca Logo
6:45 am - 5:50 am
IAD
-
EZE
22h 05m
1 stop
Avianca Logo
4:50 pm - 5:20 am
EZE
-
IAD
13h 30m
1 stop
$606Avianca
Sun, Mar 15 - Tue, Mar 31
LATAM Airlines Logo
3:00 pm - 6:30 pm
DCA
-
AEP
26h 30m
2 stops
LATAM Airlines Logo
5:05 pm - 2:01 pm
AEP
-
DCA
21h 56m
2 stops
$637LATAM Airlines
Sun, Apr 19 - Mon, Apr 27
LATAM Airlines Logo
1:45 pm - 10:30 am
DCA
-
AEP
19h 45m
2 stops
LATAM Airlines Logo
3:45 pm - 1:55 pm
AEP
-
DCA
23h 10m
2 stops
$700LATAM Airlines
Tue, Mar 24 - Tue, Mar 31

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

Our best American Airlines deals on Washington, D.C. to Buenos Aires flight tickets
American Airlines
Feb 26
BWI3:21 pmBaltimore/Washington
14h 59m
1 stop
EZE8:20 amBuenos Aires Ministro Pistarini
Mar 1
EZE10:25 pmBuenos Aires Ministro Pistarini
18h 05m
1 stop
BWI2:30 pmBaltimore/Washington
$599
American Airlines
Apr 19
BWI7:16 pmBaltimore/Washington
12h 34m
1 stop
EZE8:50 amBuenos Aires Ministro Pistarini
Apr 26
EZE10:20 pmBuenos Aires Ministro Pistarini
21h 26m
1 stop
BWI6:46 pmBaltimore/Washington
$601
American Airlines
Feb 26
DCA2:14 pmWashington, D.C. Reagan-National
16h 06m
1 stop
EZE8:20 amBuenos Aires Ministro Pistarini
Mar 1
EZE11:59 pmBuenos Aires Ministro Pistarini
16h 00m
2 stops
DCA1:59 pmWashington, D.C. Reagan-National
$604

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
Feb 26
IAD6:03 amWashington, D.C. Dulles Intl
23h 17m
1 stop
EZE7:20 amBuenos Aires Ministro Pistarini
Mar 2
EZE10:05 pmBuenos Aires Ministro Pistarini
15h 21m
1 stop
IAD11:26 amWashington, D.C. Dulles Intl
$601
United Airlines
Feb 18
DCA7:59 pmWashington, D.C. Reagan-National
33h 21m
1 stop
EZE7:20 amBuenos Aires Ministro Pistarini
Feb 25
EZE11:55 pmBuenos Aires Ministro Pistarini
18h 00m
1 stop
DCA3:55 pmWashington, D.C. Reagan-National
$609
United Airlines
Feb 26
IAD6:03 amWashington, D.C. Dulles Intl
23h 17m
1 stop
EZE7:20 amBuenos Aires Ministro Pistarini
Mar 1
EZE11:55 pmBuenos Aires Ministro Pistarini
24h 21m
1 stop
IAD10:16 pmWashington, D.C. Dulles Intl
$612

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 February 3, 2026.
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

BaltimoreBuenos Aires

BWI - EZE

BWIEZE

Baltimore/Washington

Thu 2/26

3:21 pm-8:20 am

1 stop14h 59m

Buenos Aires Ministro Pistarini

Sun 3/1

10:25 pm-2:30 pm

1 stop18h 05m

$599

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Wed 3/18

4:35 pm-10:58 pm

1 stop29h 23m

Buenos Aires Ministro Pistarini

Wed 3/25

9:16 am-4:15 am

1 stop19h 59m

$600

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Thu 2/26

6:03 am-7:20 am

1 stop23h 17m

Buenos Aires Ministro Pistarini

Mon 3/2

10:05 pm-11:26 am

1 stop15h 21m

$601

Washington, D.C.Buenos Aires

DCA - EZE

DCAEZE

Washington, D.C. Reagan-National

Thu 2/26

12:47 pm-7:20 am

1 stop16h 33m

Buenos Aires Ministro Pistarini

Mon 3/2

11:55 pm-3:55 pm

1 stop18h 00m

$601

BaltimoreBuenos Aires

BWI - EZE

BWIEZE

Baltimore/Washington

Sun 4/19

11:31 am-8:50 am

1 stop20h 19m

Buenos Aires Ministro Pistarini

Mon 4/27

8:40 pm-10:51 am

1 stop15h 11m

$601

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Fri 4/3

6:50 am-5:40 am

1 stop21h 50m

Buenos Aires Ministro Pistarini

Thu 4/30

7:10 am-5:20 am

1 stop23h 10m

$603

BaltimoreBuenos Aires

BWI - EZE

BWIEZE

Baltimore/Washington

Wed 3/18

4:45 pm-7:55 am

1 stop14h 10m

Buenos Aires Ministro Pistarini

Tue 3/24

2:31 am-3:11 pm

1 stop13h 40m

$604

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Sun 3/15

6:45 am-5:50 am

1 stop22h 05m

Buenos Aires Ministro Pistarini

Tue 3/31

4:50 pm-5:20 am

1 stop13h 30m

$606

Washington, D.C.Buenos Aires

DCA - AEP

DCAAEP

Washington, D.C. Reagan-National

Sun 4/19

3:00 pm-6:30 pm

2 stops26h 30m

Buenos Aires Jorge Newbery

Mon 4/27

5:05 pm-2:01 pm

2 stops21h 56m

$637

Washington, D.C.Buenos Aires

DCA - AEP

DCAAEP

Washington, D.C. Reagan-National

Tue 3/24

1:45 pm-10:30 am

2 stops19h 45m

Buenos Aires Jorge Newbery

Tue 3/31

3:45 pm-1:55 pm

2 stops23h 10m

$700

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest 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 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 $646, 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.

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 $836 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 $619 on momondo.

Can stopping save me money on Washington, D.C. to Buenos Aires flights?

You could potentially save up to 7% on your flight if you consider stops on a Washington, D.C. to Buenos Aires flight.

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

As of February 2026, prices for Washington, D.C. to Buenos Aires flights are approximately 42% 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

Fastest flight time

12h 55m

Direct flights

None
The fastest flight from Washington, D.C. to Buenos Aires takes 12h 55m
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.. 12h 55m 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
DeltaPriceFrom $274Free CancellationRating
7.9
8,132 reviews
Search Delta flights
LATAM AirlinesPriceFrom $278Free CancellationRating
7.5
1,918 reviews
Search LATAM Airlines flights
Copa AirlinesPriceFrom $356Free CancellationRating
7.5
1,559 reviews
Search Copa Airlines flights
American AirlinesPriceFrom $599Free CancellationRating
7.2
11,212 reviews
Search American Airlines flights
AviancaPriceFrom $600Free CancellationRating
6.5
2,494 reviews
Search Avianca flights
United AirlinesPriceFrom $615Free CancellationRating
7.4
9,231 reviews
Search United 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