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Cheap flights from Washington, D.C. to Buenos Aires from $267

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 11/6. 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 (WAS-BUE)

Cheap round-trip flights

Avianca Logo
6:45 am - 5:50 amIAD-EZE
22h 05m1 stop
Avianca Logo
1:40 am - 1:15 pmEZE-IAD
13h 35m1 stop
$593Avianca
Find Deal
Wed, Oct 29 - Tue, Nov 4
Avianca Logo
5:45 am - 12:10 amIAD-EZE
17h 25m2 stops
Avianca Logo
1:40 am - 2:00 pmEZE-IAD
13h 20m1 stop
$595Avianca
Find Deal
Thu, Sep 11 - Wed, Sep 17
Copa Airlines Logo
2:25 am - 12:44 amIAD-EZE
21h 19m1 stop
Copa Airlines Logo
3:48 am - 12:30 amEZE-IAD
21h 42m1 stop
$627Copa Airlines
Find Deal
Sun, Aug 24 - Thu, Sep 4
Delta Logo
12:17 pm - 9:45 amBWI-EZE
20h 28m1 stop
Delta Logo
8:10 pm - 6:52 pmEZE-BWI
23h 42m1 stop
$631Delta
Find Deal
Mon, Aug 25 - Tue, Sep 9
Delta Logo
7:38 pm - 9:45 amDCA-EZE
13h 07m1 stop
Delta Logo
3:55 am - 2:04 pmEZE-DCA
35h 09m2 stops
$631Delta
Find Deal
Mon, Aug 25 - Mon, Sep 8
United Airlines Logo
2:54 pm - 8:00 amBWI-EZE
16h 06m1 stop
United Airlines Logo
9:00 pm - 4:17 pmEZE-BWI
20h 17m1 stop
$639United Airlines
Find Deal
Mon, Aug 25 - Fri, Sep 5
Copa Airlines Logo
8:59 am - 12:44 amIAD-EZE
14h 45m1 stop
Copa Airlines Logo
2:33 pm - 12:30 amEZE-IAD
34h 57m1 stop
$644Copa Airlines
Find Deal
Mon, Aug 25 - Tue, Sep 9
American Airlines Logo
7:23 pm - 10:15 amDCA-EZE
13h 52m1 stop
American Airlines Logo
8:40 pm - 12:59 pmEZE-DCA
17h 19m2 stops
$644American Airlines
Find Deal
Sun, Sep 7 - Sun, Sep 21
United Airlines Logo
4:47 pm - 8:00 amDCA-EZE
14h 13m1 stop
United Airlines Logo
9:00 pm - 1:56 pmEZE-DCA
17h 56m1 stop
$646United Airlines
Find Deal
Mon, Aug 25 - Tue, Sep 9
American Airlines Logo
10:05 am - 7:20 amBWI-EZE
20h 15m2 stops
American Airlines Logo
8:40 pm - 11:59 pmEZE-BWI
28h 19m1 stop
$652American Airlines
Find Deal
Wed, Sep 10 - Wed, Sep 17

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

Our best Avianca deals on Washington, D.C. to Buenos Aires flight tickets
Avianca
Oct 29
IAD6:45 amWashington, D.C. Dulles Intl
22h 05m
1 stop
EZE5:50 amBuenos Aires Ministro Pistarini
Nov 4
EZE1:40 amBuenos Aires Ministro Pistarini
13h 35m
1 stop
IAD1:15 pmWashington, D.C. Dulles Intl
$593
Find similar
Avianca
Sep 11
IAD5:45 amWashington, D.C. Dulles Intl
17h 25m
2 stops
EZE12:10 amBuenos Aires Ministro Pistarini
Sep 17
EZE1:40 amBuenos Aires Ministro Pistarini
13h 20m
1 stop
IAD2:00 pmWashington, D.C. Dulles Intl
$595
Find similar
Avianca
Sep 11
IAD5:45 amWashington, D.C. Dulles Intl
17h 25m
2 stops
EZE12:10 amBuenos Aires Ministro Pistarini
Sep 18
EZE1:40 amBuenos Aires Ministro Pistarini
27h 40m
2 stops
IAD4:20 amWashington, D.C. Dulles Intl
$596
Find similar

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

Our best LATAM Airlines deals on Washington, D.C. to Buenos Aires flight tickets
LATAM Airlines
Sep 9
DCA5:00 pmWashington, D.C. Reagan-National
23h 11m
2 stops
EZE5:11 pmBuenos Aires Ministro Pistarini
Sep 25
EZE6:13 pmBuenos Aires Ministro Pistarini
20h 47m
2 stops
DCA2:00 pmWashington, D.C. Reagan-National
$620
Find similar
LATAM Airlines
Sep 10
BWI12:17 pmBaltimore/Washington
16h 38m
2 stops
EZE5:55 amBuenos Aires Ministro Pistarini
Sep 17
EZE7:30 amBuenos Aires Ministro Pistarini
17h 58m
2 stops
BWI12:28 amBaltimore/Washington
$632
Find similar
LATAM Airlines
Sep 7
DCA2:59 pmWashington, D.C. Reagan-National
22h 41m
2 stops
AEP2:40 pmBuenos Aires Jorge Newbery
Sep 21
AEP8:10 pmBuenos Aires Jorge Newbery
18h 50m
2 stops
DCA2:00 pmWashington, D.C. Reagan-National
$635
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 August 14, 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

Wed 10/29

6:45 am-5:50 am

1 stop22h 05m

Buenos Aires Ministro Pistarini

Tue 11/4

1:40 am-1:15 pm

1 stop13h 35m

$593

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Thu 9/11

5:45 am-12:10 am

2 stops17h 25m

Buenos Aires Ministro Pistarini

Wed 9/17

1:40 am-2:00 pm

1 stop13h 20m

$595

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Sun 8/24

2:25 am-12:44 am

1 stop21h 19m

Buenos Aires Ministro Pistarini

Thu 9/4

3:48 am-12:30 am

1 stop21h 42m

$627

BaltimoreBuenos Aires

BWI - EZE

BWIEZE

Baltimore/Washington

Mon 8/25

12:17 pm-9:45 am

1 stop20h 28m

Buenos Aires Ministro Pistarini

Tue 9/9

8:10 pm-6:52 pm

1 stop23h 42m

$631

Washington, D.C.Buenos Aires

DCA - EZE

DCAEZE

Washington, D.C. Reagan-National

Mon 8/25

7:38 pm-9:45 am

1 stop13h 07m

Buenos Aires Ministro Pistarini

Mon 9/8

3:55 am-2:04 pm

2 stops35h 09m

$631

BaltimoreBuenos Aires

BWI - EZE

BWIEZE

Baltimore/Washington

Mon 8/25

2:54 pm-8:00 am

1 stop16h 06m

Buenos Aires Ministro Pistarini

Fri 9/5

9:00 pm-4:17 pm

1 stop20h 17m

$639

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Mon 8/25

8:59 am-12:44 am

1 stop14h 45m

Buenos Aires Ministro Pistarini

Tue 9/9

2:33 pm-12:30 am

1 stop34h 57m

$644

Washington, D.C.Buenos Aires

DCA - EZE

DCAEZE

Washington, D.C. Reagan-National

Sun 9/7

7:23 pm-10:15 am

1 stop13h 52m

Buenos Aires Ministro Pistarini

Sun 9/21

8:40 pm-12:59 pm

2 stops17h 19m

$644

Washington, D.C.Buenos Aires

DCA - EZE

DCAEZE

Washington, D.C. Reagan-National

Mon 8/25

4:47 pm-8:00 am

1 stop14h 13m

Buenos Aires Ministro Pistarini

Tue 9/9

9:00 pm-1:56 pm

1 stop17h 56m

$646

BaltimoreBuenos Aires

BWI - EZE

BWIEZE

Baltimore/Washington

Wed 9/10

10:05 am-7:20 am

2 stops20h 15m

Buenos Aires Ministro Pistarini

Wed 9/17

8:40 pm-11:59 pm

1 stop28h 19m

$652

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 September. Flight prices, which tend to average around $732, 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. during October instead. Flights to Buenos Aires in October, while not as cheap as those in September, still average around $791.

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 $923 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 $779 on momondo.

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

As of August 2025, prices for Washington, D.C. to Buenos Aires flights are approximately 28% 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

Best Price Found

$267

Fastest flight time

12h 50m

Direct flights

None

Airports in Buenos Aires

2 airports
The best one-way flight to Buenos Aires from Washington, D.C. in the past 72 hours is $267. The best round-trip flight deal from Washington, D.C. to Buenos Aires found on momondo in the last 72 hours is $593.
The fastest flight from Washington, D.C. to Buenos Aires takes 12h 50m
There are no direct flights from Washington, D.C. to Buenos Aires. Popular non-direct routes for this connection are Washington, D.C. Dulles Intl Airport - Buenos Aires Ministro Pistarini Airport, Baltimore/Washington Airport - Buenos Aires Jorge Newbery Airport and Washington, D.C. Dulles Intl Airport - Buenos Aires Jorge Newbery Airport.
There are 2 airports near Buenos Aires: Buenos Aires Ministro Pistarini (EZE), Buenos Aires Jorge Newbery (AEP)
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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 50m 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
Copa AirlinesPriceFrom $568Free CancellationRating
7.5
1,507 reviews
Search Copa Airlines flights
AviancaPriceFrom $605Free CancellationRating
6.7
2,399 reviews
Search Avianca flights
American AirlinesPriceFrom $629Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $629Free CancellationRating
7.4
8,916 reviews
Search United Airlines flights
DeltaPriceFrom $629Free CancellationRating
8.0
7,980 reviews
Search Delta flights
LATAM AirlinesPriceFrom $678Free CancellationRating
7.5
1,840 reviews
Search LATAM 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