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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.
United Airlines Logo
8:07 am - 7:20 am
BWI
-
EZE
21h 13m1 stop
United Airlines Logo
10:05 pm - 11:30 am
EZE
-
BWI
15h 25m1 stop
$600United Airlines
Wed, Jan 28 - Wed, Feb 18
American Airlines Logo
6:07 am - 8:25 am
BWI
-
EZE
24h 18m1 stop
American Airlines Logo
10:25 pm - 5:57 pm
EZE
-
BWI
21h 32m2 stops
$604American Airlines
Wed, Jan 21 - Wed, Feb 4
Copa Airlines Logo
9:32 am - 4:30 am
IAD
-
EZE
17h 58m1 stop
Copa Airlines Logo
2:57 pm - 4:22 am
EZE
-
IAD
14h 25m1 stop
$628Copa Airlines
Thu, Apr 16 - Mon, Apr 20
Avianca Logo
4:15 pm - 12:35 am
IAD
-
EZE
30h 20m2 stops
Avianca Logo
4:55 pm - 4:55 pm
EZE
-
IAD
26h 00m2 stops
$630Avianca
Wed, Jan 28 - Mon, Feb 9
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
$632Avianca
Tue, Apr 7 - Tue, Apr 14
Delta Logo
5:09 pm - 10:15 am
DCA
-
EZE
16h 06m1 stop
Delta Logo
8:10 pm - 6:33 pm
EZE
-
DCA
23h 23m1 stop
$636Delta
Thu, Mar 19 - Wed, Apr 8
LATAM Airlines Logo
3:21 pm - 9:45 am
IAD
-
EZE
17h 24m1 stop
LATAM Airlines Logo
7:35 am - 12:28 am
EZE
-
IAD
17h 53m2 stops
$636LATAM Airlines
Sat, Apr 18 - Thu, Apr 23
LATAM Airlines Logo
3:50 pm - 9:40 am
DCA
-
AEP
16h 50m2 stops
LATAM Airlines Logo
8:05 pm - 12:40 pm
AEP
-
DCA
17h 35m2 stops
$636LATAM Airlines
Mon, Mar 23 - Tue, Apr 7
Delta Logo
7:52 pm - 10:15 am
IAD
-
EZE
36h 23m1 stop
Delta Logo
4:05 am - 12:21 am
EZE
-
IAD
22h 16m2 stops
$642Delta
Sat, Feb 28 - Fri, Mar 6
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
Sun, Feb 1 - Sun, Feb 15

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 21
BWI9:17 amBaltimore/Washington
20h 58m
2 stops
EZE8:15 amBuenos Aires Ministro Pistarini
Feb 4
EZE10:25 pmBuenos Aires Ministro Pistarini
21h 32m
2 stops
BWI5:57 pmBaltimore/Washington
$604
Find similar
American Airlines
Dec 27
DCA7:00 pmWashington, D.C. Reagan-National
13h 40m
1 stop
EZE10:40 amBuenos Aires Ministro Pistarini
Feb 21
EZE11:59 pmBuenos Aires Ministro Pistarini
22h 15m
1 stop
DCA8:14 pmWashington, D.C. Reagan-National
$671
Find similar
American Airlines
Jan 12
IAD1:08 pmWashington, D.C. Dulles Intl
17h 17m
2 stops
EZE8:25 amBuenos Aires Ministro Pistarini
Jan 26
EZE10:25 pmBuenos Aires Ministro Pistarini
24h 52m
1 stop
IAD9:17 pmWashington, D.C. Dulles Intl
$675
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 28
IAD4:15 pmWashington, D.C. Dulles Intl
30h 20m
2 stops
EZE12:35 amBuenos Aires Ministro Pistarini
Feb 9
EZE4:55 pmBuenos Aires Ministro Pistarini
26h 00m
2 stops
IAD4:55 pmWashington, D.C. Dulles Intl
$630
Find similar
Avianca
Feb 27
IAD5:45 amWashington, D.C. Dulles Intl
22h 05m
1 stop
EZE5:50 amBuenos Aires Ministro Pistarini
Mar 6
EZE4:55 pmBuenos Aires Ministro Pistarini
22h 20m
1 stop
IAD1:15 pmWashington, D.C. Dulles Intl
$635
Find similar
Avianca
Jan 30
IAD5:45 amWashington, D.C. Dulles Intl
16h 50m
1 stop
EZE12:35 amBuenos Aires Ministro Pistarini
Mar 1
EZE4:55 pmBuenos Aires Ministro Pistarini
24h 00m
2 stops
IAD2:55 pmWashington, D.C. Dulles Intl
$637
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 23, 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

Wed 1/28

8:07 am-7:20 am

1 stop21h 13m

Buenos Aires Ministro Pistarini

Wed 2/18

10:05 pm-11:30 am

1 stop15h 25m

$600

BaltimoreBuenos Aires

BWI - EZE

BWIEZE

Baltimore/Washington

Wed 1/21

6:07 am-8:25 am

1 stop24h 18m

Buenos Aires Ministro Pistarini

Wed 2/4

10:25 pm-5:57 pm

2 stops21h 32m

$604

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Thu 4/16

9:32 am-4:30 am

1 stop17h 58m

Buenos Aires Ministro Pistarini

Mon 4/20

2:57 pm-4:22 am

1 stop14h 25m

$628

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Wed 1/28

4:15 pm-12:35 am

2 stops30h 20m

Buenos Aires Ministro Pistarini

Mon 2/9

4:55 pm-4:55 pm

2 stops26h 00m

$630

Washington, D.C.Buenos Aires

IAD - AEP

IADAEP

Washington, D.C. Dulles Intl

Tue 4/7

5:45 am-5:40 am

2 stops22h 55m

Buenos Aires Jorge Newbery

Tue 4/14

7:00 am-5:35 am

1 stop23h 35m

$632

Washington, D.C.Buenos Aires

DCA - EZE

DCAEZE

Washington, D.C. Reagan-National

Thu 3/19

5:09 pm-10:15 am

1 stop16h 06m

Buenos Aires Ministro Pistarini

Wed 4/8

8:10 pm-6:33 pm

1 stop23h 23m

$636

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Sat 4/18

3:21 pm-9:45 am

1 stop17h 24m

Buenos Aires Ministro Pistarini

Thu 4/23

7:35 am-12:28 am

2 stops17h 53m

$636

Washington, D.C.Buenos Aires

DCA - AEP

DCAAEP

Washington, D.C. Reagan-National

Mon 3/23

3:50 pm-9:40 am

2 stops16h 50m

Buenos Aires Jorge Newbery

Tue 4/7

8:05 pm-12:40 pm

2 stops17h 35m

$636

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Sat 2/28

7:52 pm-10:15 am

1 stop36h 23m

Buenos Aires Ministro Pistarini

Fri 3/6

4:05 am-12:21 am

2 stops22h 16m

$642

BaltimoreBuenos Aires

BWI - EZE

BWIEZE

Baltimore/Washington

Sun 2/1

3:45 pm-7:57 am

1 stop14h 12m

Buenos Aires Ministro Pistarini

Sun 2/15

2:27 am-2:10 pm

1 stop13h 43m

$642

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 $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 05m

Direct flights

None
The fastest flight from Washington, D.C. to Buenos Aires takes 13h 05m
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 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 $278Free CancellationRating
7.5
1,894 reviews
Search LATAM Airlines flights
DeltaPriceFrom $514Free CancellationRating
7.9
8,014 reviews
Search Delta flights
AviancaPriceFrom $600Free CancellationRating
6.6
2,492 reviews
Search Avianca flights
Copa AirlinesPriceFrom $617Free CancellationRating
7.6
1,558 reviews
Search Copa Airlines flights
American AirlinesPriceFrom $629Free CancellationRating
7.2
11,054 reviews
Search American Airlines flights
United AirlinesPriceFrom $629Free CancellationRating
7.4
9,105 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