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Cheap flights from Washington, D.C. Dulles Intl Airport to Buenos Aires from $270

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. Dulles Intl Airport to Buenos Aires departing on 1/14. 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. Dulles Intl Airport to Buenos Aires (IAD-BUE)

Cheap round-trip flights

Avianca Logo
4:15 pm - 3:50 pmIAD-EZE
21h 35m2 stops
Avianca Logo
4:55 pm - 4:25 amEZE-IAD
13h 30m1 stop
$631Avianca
Find Deal
Sat, Feb 7 - Sat, Feb 14
LATAM Airlines Logo
7:35 pm - 1:55 pmIAD-EZE
17h 20m2 stops
LATAM Airlines Logo
6:13 pm - 11:57 amEZE-IAD
18h 44m2 stops
$632LATAM Airlines
Find Deal
Mon, Oct 6 - Tue, Oct 21
Copa Airlines Logo
2:25 am - 12:55 amIAD-EZE
21h 30m1 stop
Copa Airlines Logo
2:33 pm - 4:20 amEZE-IAD
14h 47m1 stop
$637Copa Airlines
Find Deal
Sun, Aug 31 - Fri, Sep 12
Delta Logo
7:00 am - 5:55 amIAD-EZE
20h 55m2 stops
Delta Logo
10:25 pm - 7:11 pmEZE-IAD
22h 46m1 stop
$639Delta
Find Deal
Tue, Nov 25 - Wed, Dec 3
American Airlines Logo
10:25 am - 10:15 amIAD-EZE
22h 50m2 stops
American Airlines Logo
10:30 pm - 6:54 pmEZE-IAD
21h 24m2 stops
$643American Airlines
Find Deal
Wed, Oct 8 - Wed, Oct 29
Delta Logo
5:25 pm - 7:20 amIAD-EZE
35h 55m1 stop
Delta Logo
10:25 pm - 7:11 pmEZE-IAD
22h 46m1 stop
$646Delta
Find Deal
Sat, Nov 22 - Tue, Dec 2
United Airlines Logo
10:10 pm - 9:20 amIAD-EZE
33h 10m1 stop
United Airlines Logo
11:55 pm - 10:15 pmEZE-IAD
24h 20m1 stop
$648United Airlines
Find Deal
Tue, Nov 25 - Wed, Dec 3
Copa Airlines Logo
9:35 am - 12:44 amIAD-EZE
14h 09m1 stop
Copa Airlines Logo
3:48 am - 12:30 amEZE-IAD
21h 42m1 stop
$657Copa Airlines
Find Deal
Mon, Sep 1 - Thu, Sep 11
United Airlines Logo
6:00 am - 7:20 amIAD-EZE
23h 20m1 stop
United Airlines Logo
10:05 pm - 11:23 amEZE-IAD
15h 18m1 stop
$689United Airlines
Find Deal
Sun, Dec 7 - Thu, Dec 11
American Airlines Logo
8:52 am - 10:15 amIAD-EZE
23h 23m2 stops
American Airlines Logo
10:10 am - 8:40 amEZE-IAD
24h 30m2 stops
$694American Airlines
Find Deal
Sat, Feb 7 - Sat, Feb 21

Copa Airlines flights from Washington, D.C. Dulles Intl Airport to Buenos Aires

Our best Copa Airlines deals on Washington, D.C. Dulles Intl Airport to Buenos Aires flight tickets
Copa Airlines
Aug 31
IAD2:25 amWashington, D.C. Dulles Intl
21h 30m
1 stop
EZE12:55 amBuenos Aires Ministro Pistarini
Sep 12
EZE2:33 pmBuenos Aires Ministro Pistarini
14h 47m
1 stop
IAD4:20 amWashington, D.C. Dulles Intl
$637
Find similar
Copa Airlines
Aug 23
IAD4:34 pmWashington, D.C. Dulles Intl
31h 10m
1 stop
EZE12:44 amBuenos Aires Ministro Pistarini
Sep 5
EZE2:33 pmBuenos Aires Ministro Pistarini
14h 47m
1 stop
IAD4:20 amWashington, D.C. Dulles Intl
$653
Find similar
Copa Airlines
Sep 1
IAD9:35 amWashington, D.C. Dulles Intl
14h 09m
1 stop
EZE12:44 amBuenos Aires Ministro Pistarini
Sep 11
EZE3:48 amBuenos Aires Ministro Pistarini
21h 42m
1 stop
IAD12:30 amWashington, D.C. Dulles Intl
$657
Find similar

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

Our best American Airlines deals on Washington, D.C. Dulles Intl Airport to Buenos Aires flight tickets
American Airlines
Oct 8
IAD10:25 amWashington, D.C. Dulles Intl
22h 50m
2 stops
EZE10:15 amBuenos Aires Ministro Pistarini
Oct 29
EZE10:30 pmBuenos Aires Ministro Pistarini
21h 24m
2 stops
IAD6:54 pmWashington, D.C. Dulles Intl
$643
Find similar
American Airlines
Feb 7
IAD8:52 amWashington, D.C. Dulles Intl
23h 23m
2 stops
EZE10:15 amBuenos Aires Ministro Pistarini
Feb 21
EZE10:10 amBuenos Aires Ministro Pistarini
24h 30m
2 stops
IAD8:40 amWashington, D.C. Dulles Intl
$694
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Washington, D.C. Dulles Intl Airport 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 21, 2025.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport 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

Sat 2/7

4:15 pm-3:50 pm

2 stops21h 35m

Buenos Aires Ministro Pistarini

Sat 2/14

4:55 pm-4:25 am

1 stop13h 30m

$631

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Mon 10/6

7:35 pm-1:55 pm

2 stops17h 20m

Buenos Aires Ministro Pistarini

Tue 10/21

6:13 pm-11:57 am

2 stops18h 44m

$632

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Sun 8/31

2:25 am-12:55 am

1 stop21h 30m

Buenos Aires Ministro Pistarini

Fri 9/12

2:33 pm-4:20 am

1 stop14h 47m

$637

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Tue 11/25

7:00 am-5:55 am

2 stops20h 55m

Buenos Aires Ministro Pistarini

Wed 12/3

10:25 pm-7:11 pm

1 stop22h 46m

$639

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Wed 10/8

10:25 am-10:15 am

2 stops22h 50m

Buenos Aires Ministro Pistarini

Wed 10/29

10:30 pm-6:54 pm

2 stops21h 24m

$643

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Sat 11/22

5:25 pm-7:20 am

1 stop35h 55m

Buenos Aires Ministro Pistarini

Tue 12/2

10:25 pm-7:11 pm

1 stop22h 46m

$646

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Tue 11/25

10:10 pm-9:20 am

1 stop33h 10m

Buenos Aires Ministro Pistarini

Wed 12/3

11:55 pm-10:15 pm

1 stop24h 20m

$648

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Mon 9/1

9:35 am-12:44 am

1 stop14h 09m

Buenos Aires Ministro Pistarini

Thu 9/11

3:48 am-12:30 am

1 stop21h 42m

$657

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Sun 12/7

6:00 am-7:20 am

1 stop23h 20m

Buenos Aires Ministro Pistarini

Thu 12/11

10:05 pm-11:23 am

1 stop15h 18m

$689

Washington, D.C.Buenos Aires

IAD - EZE

IADEZE

Washington, D.C. Dulles Intl

Sat 2/7

8:52 am-10:15 am

2 stops23h 23m

Buenos Aires Ministro Pistarini

Sat 2/21

10:10 am-8:40 am

2 stops24h 30m

$694

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. Dulles Intl Airport 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. Dulles Intl Airport is in August. Flight prices, which tend to average around $738, 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. Dulles Intl Airport during September instead. Flights to Buenos Aires in September, while not as cheap as those in August, still average around $767.

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. Dulles Intl Airport 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. Dulles Intl Airport 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. Dulles Intl Airport 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. Dulles Intl Airport for as low as $779 on momondo.

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

You could potentially save up to 3% on your flight if you consider stops on a Washington, D.C. Dulles Intl Airport to Buenos Aires flight.

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

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

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

Direct flights

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

    The straight-line distance from Washington, D.C. Dulles Intl to Buenos Aires is 5223.3 mi. Typically, this will take 13h 05m by plane in normal conditions.

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

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

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

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington, D.C. Dulles Intl Airport to Buenos Aires.

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

    The necessary travel and health documents for your Buenos Aires trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

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

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

Compare and see reviews for airlines that fly from Washington, D.C. Dulles Intl Airport to Buenos Aires with momondo
Airline
Rating
Free Cancellation
Price
Copa AirlinesPriceFrom $568Free CancellationRating
7.5
1,512 reviews
Search Copa Airlines flights
AviancaPriceFrom $605Free CancellationRating
6.7
2,415 reviews
Search Avianca flights
United AirlinesPriceFrom $629Free CancellationRating
7.4
8,930 reviews
Search United Airlines flights
DeltaPriceFrom $728Free CancellationRating
7.9
7,981 reviews
Search Delta flights

Why use momondo?

Why should I use momondo to find a flight deal from Washington, D.C. to Buenos Aires?

It is quick and easy to find Washington, D.C. to Buenos Aires flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Buenos Aires that suits you.

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

Flights from Washington, D.C. to Buenos Aires with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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 not ready to book a flight from Washington, D.C. to Buenos Aires now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Buenos Aires and let you know 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