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Cheap flights from Washington, D.C. to Buenos Aires from $255

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 1/1. 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
10:09 am - 7:10 am
BWI
-
EZE
19h 01m1 stop
American Airlines Logo
10:25 pm - 2:49 pm
EZE
-
BWI
18h 24m1 stop
$600American Airlines
Tue, Jan 20 - Tue, Feb 10
American Airlines Logo
9:17 am - 7:10 am
BWI
-
EZE
19h 53m2 stops
American Airlines Logo
10:25 pm - 5:52 pm
EZE
-
BWI
21h 27m2 stops
$604American Airlines
Tue, Jan 20 - Tue, Feb 10
Avianca Logo
4:30 am - 5:50 am
IAD
-
EZE
23h 20m2 stops
Avianca Logo
4:55 pm - 2:55 pm
EZE
-
IAD
24h 00m2 stops
$639Avianca
Wed, Jan 21 - Mon, Feb 9
Delta Logo
7:51 pm - 10:15 am
IAD
-
EZE
36h 24m1 stop
Delta Logo
8:10 pm - 12:01 pm
EZE
-
IAD
16h 51m1 stop
$642Delta
Sat, Feb 28 - Tue, May 19
Delta Logo
6:00 pm - 9:45 am
DCA
-
EZE
14h 45m1 stop
Delta Logo
8:10 pm - 7:19 pm
EZE
-
DCA
24h 09m1 stop
$642Delta
Tue, Apr 7 - Tue, Apr 14
Copa Airlines Logo
3:45 pm - 7:57 am
BWI
-
EZE
14h 12m1 stop
Copa Airlines Logo
2:27 am - 2:10 pm
EZE
-
BWI
13h 43m1 stop
$642Copa Airlines
Mon, Feb 9 - Fri, Feb 13
Copa Airlines Logo
1:18 am - 4:10 am
IAD
-
EZE
24h 52m1 stop
Copa Airlines Logo
9:16 am - 4:15 am
EZE
-
IAD
19h 59m1 stop
$643Copa Airlines
Wed, Mar 4 - Sat, Mar 14
Avianca Logo
5:45 am - 5:40 am
IAD
-
AEP
22h 55m2 stops
Avianca Logo
7:00 am - 5:35 am
AEP
-
IAD
23h 35m1 stop
$649Avianca
Mon, Apr 13 - Sun, Apr 19
United Airlines Logo
6:00 am - 7:20 am
IAD
-
EZE
23h 20m1 stop
United Airlines Logo
11:55 pm - 8:49 pm
EZE
-
IAD
22h 54m1 stop
$655United Airlines
Sun, Jan 11 - Sun, Feb 1
United Airlines Logo
8:15 am - 7:20 am
DCA
-
EZE
21h 05m1 stop
United Airlines Logo
11:55 pm - 1:43 pm
EZE
-
DCA
15h 48m1 stop
$655United Airlines
Sun, Jan 11 - Sun, Feb 1

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
Jan 20
BWI10:09 amBaltimore/Washington
19h 01m
1 stop
EZE7:10 amBuenos Aires Ministro Pistarini
Feb 10
EZE10:25 pmBuenos Aires Ministro Pistarini
18h 24m
1 stop
BWI2:49 pmBaltimore/Washington
$600
Find similar
American Airlines
Jan 20
BWI9:17 amBaltimore/Washington
19h 53m
2 stops
EZE7:10 amBuenos Aires Ministro Pistarini
Feb 10
EZE10:25 pmBuenos Aires Ministro Pistarini
21h 27m
2 stops
BWI5:52 pmBaltimore/Washington
$604
Find similar
American Airlines
Jan 23
BWI6:36 pmBaltimore/Washington
13h 34m
1 stop
EZE10:10 amBuenos Aires Ministro Pistarini
Feb 8
EZE10:10 amBuenos Aires Ministro Pistarini
25h 09m
1 stop
BWI9:19 amBaltimore/Washington
$608
Find similar

Avianca flights from Washington, D.C. to Buenos Aires

Our best Avianca deals on Washington, D.C. to Buenos Aires flight tickets
Avianca
Jan 21
IAD4:30 amWashington, D.C. Dulles Intl
23h 20m
2 stops
EZE5:50 amBuenos Aires Ministro Pistarini
Feb 9
EZE4:55 pmBuenos Aires Ministro Pistarini
24h 00m
2 stops
IAD2:55 pmWashington, D.C. Dulles Intl
$639
Find similar
Avianca
Apr 11
IAD5:45 amWashington, D.C. Dulles Intl
17h 25m
2 stops
EZE12:10 amBuenos Aires Ministro Pistarini
Apr 18
EZE4:45 pmBuenos Aires Ministro Pistarini
13h 50m
1 stop
IAD5:35 amWashington, D.C. Dulles Intl
$641
Find similar
Avianca
May 1
IAD3:25 pmWashington, D.C. Dulles Intl
22h 55m
1 stop
EZE3:20 pmBuenos Aires Ministro Pistarini
May 14
EZE4:45 pmBuenos Aires Ministro Pistarini
13h 50m
1 stop
IAD5:35 amWashington, D.C. Dulles Intl
$645
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 December 16, 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

BaltimoreBuenos Aires

BWI - EZE

BWIEZE

Baltimore/Washington

Tue 1/20

10:09 am-7:10 am

1 stop19h 01m

Buenos Aires Ministro Pistarini

Tue 2/10

10:25 pm-2:49 pm

1 stop18h 24m

$600

BaltimoreBuenos Aires

BWI - EZE

BWIEZE

Baltimore/Washington

Tue 1/20

9:17 am-7:10 am

2 stops19h 53m

Buenos Aires Ministro Pistarini

Tue 2/10

10:25 pm-5:52 pm

2 stops21h 27m

$604

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Wed 1/21

4:30 am-5:50 am

2 stops23h 20m

Buenos Aires Ministro Pistarini

Mon 2/9

4:55 pm-2:55 pm

2 stops24h 00m

$639

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Sat 2/28

7:51 pm-10:15 am

1 stop36h 24m

Buenos Aires Ministro Pistarini

Tue 5/19

8:10 pm-12:01 pm

1 stop16h 51m

$642

Washington, D.C.Buenos Aires

DCA - EZE

DCAEZE

Washington, D.C. Reagan-National

Tue 4/7

6:00 pm-9:45 am

1 stop14h 45m

Buenos Aires Ministro Pistarini

Tue 4/14

8:10 pm-7:19 pm

1 stop24h 09m

$642

BaltimoreBuenos Aires

BWI - EZE

BWIEZE

Baltimore/Washington

Mon 2/9

3:45 pm-7:57 am

1 stop14h 12m

Buenos Aires Ministro Pistarini

Fri 2/13

2:27 am-2:10 pm

1 stop13h 43m

$642

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Wed 3/4

1:18 am-4:10 am

1 stop24h 52m

Buenos Aires Ministro Pistarini

Sat 3/14

9:16 am-4:15 am

1 stop19h 59m

$643

Washington, D.C.Buenos Aires

IAD - AEP

IADAEP

Washington, D.C. Dulles Intl

Mon 4/13

5:45 am-5:40 am

2 stops22h 55m

Buenos Aires Jorge Newbery

Sun 4/19

7:00 am-5:35 am

1 stop23h 35m

$649

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Sun 1/11

6:00 am-7:20 am

1 stop23h 20m

Buenos Aires Ministro Pistarini

Sun 2/1

11:55 pm-8:49 pm

1 stop22h 54m

$655

Washington, D.C.Buenos Aires

DCA - EZE

DCAEZE

Washington, D.C. Reagan-National

Sun 1/11

8:15 am-7:20 am

1 stop21h 05m

Buenos Aires Ministro Pistarini

Sun 2/1

11:55 pm-1:43 pm

1 stop15h 48m

$655

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 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 $832 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 $623 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 December 2025, prices for Washington, D.C. to Buenos Aires flights are approximately 30% 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

13h 01m

Direct flights

None
The fastest flight from Washington, D.C. to Buenos Aires takes 13h 01m
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.
Search flight deals

  • How far is Washington, D.C. to Buenos Aires by plane?

    Buenos Aires is 5214.3 mi away from Washington, D.C.. 13h 01m 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 $278Free CancellationRating
7.5
1,892 reviews
Search LATAM Airlines flights
DeltaPriceFrom $514Free CancellationRating
7.9
8,008 reviews
Search Delta flights
AviancaPriceFrom $600Free CancellationRating
6.6
2,486 reviews
Search Avianca flights
Copa AirlinesPriceFrom $617Free CancellationRating
7.6
1,556 reviews
Search Copa Airlines flights
American AirlinesPriceFrom $629Free CancellationRating
7.2
11,049 reviews
Search American Airlines flights
United AirlinesPriceFrom $629Free CancellationRating
7.4
9,092 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