WAS - EZE

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

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Washington, D.C. to Buenos Aires departing on 12/8. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Buenos Aires Ministro Pistarini Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Buenos Aires.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Buenos Aires.
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Everything you should know

Cheapest round-trip
$628
Typical prices: $511-$1,056
Copa Airlines
Wed 3/11Tue 3/31
BWI - EZE • 1 stop
Cheapest one-way
$255
Typical prices: $443-$624
American Airlines
Mon 12/8
BWI - EZE • 1 stop
Top airlines
Copa Airlines
Cheapest • from $628 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
September
Cheapest • 22% price drop
December
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Washington, D.C. to Buenos Aires (WAS-EZE)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Washington, D.C. to Buenos Aires that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Washington, D.C. to Buenos Aires

Wed, Mar 11 - Tue, Mar 31
Copa Airlines Logo
4:45 pm - 7:55 amBWI-EZE
14h 10m1 stop
Copa Airlines Logo
12:14 am - 3:17 pmEZE-BWI
16h 03m1 stop
$628Copa Airlines
Find Deal
Thu, Apr 9 - Tue, Apr 21
Delta Logo
2:38 pm - 9:45 amBWI-EZE
18h 07m1 stop
Delta Logo
8:10 pm - 9:15 amEZE-BWI
14h 05m1 stop
$637Delta
Find Deal
Tue, Apr 7 - Tue, Apr 21
Delta Logo
6:59 pm - 9:45 amBWI-EZE
13h 46m1 stop
Delta Logo
8:10 pm - 9:15 amEZE-BWI
14h 05m1 stop
$638Delta
Find Deal
Mon, Feb 16 - Thu, Feb 26
United Airlines Logo
12:37 pm - 7:20 amBWI-EZE
16h 43m1 stop
United Airlines Logo
11:55 pm - 4:10 pmEZE-BWI
18h 15m1 stop
$640United Airlines
Find Deal
Sun, Apr 12 - Tue, Apr 21
LATAM Airlines Logo
3:35 pm - 9:45 amIAD-EZE
17h 10m1 stop
LATAM Airlines Logo
8:10 pm - 6:45 pmEZE-IAD
23h 35m1 stop
$641LATAM Airlines
Find Deal
Wed, Apr 8 - Wed, Apr 22
LATAM Airlines Logo
1:50 pm - 6:20 amDCA-EZE
15h 30m2 stops
LATAM Airlines Logo
8:10 pm - 10:56 amEZE-DCA
15h 46m1 stop
$641LATAM Airlines
Find Deal
Wed, Mar 25 - Tue, Apr 14
Copa Airlines Logo
2:18 am - 1:57 amIAD-EZE
22h 39m1 stop
Copa Airlines Logo
3:52 am - 12:34 amEZE-IAD
21h 42m1 stop
$643Copa Airlines
Find Deal
Sun, Feb 8 - Mon, Feb 23
Avianca Logo
5:45 am - 12:35 amIAD-EZE
16h 50m1 stop
Avianca Logo
4:55 pm - 2:55 pmEZE-IAD
24h 00m2 stops
$646Avianca
Find Deal
Sat, Dec 13 - Tue, Dec 23
United Airlines Logo
5:40 pm - 7:20 amIAD-EZE
35h 40m1 stop
United Airlines Logo
11:55 pm - 4:24 pmEZE-IAD
18h 29m1 stop
$648United Airlines
Find Deal
Fri, Apr 10 - Sat, Apr 25
Avianca Logo
7:00 am - 5:45 amIAD-EZE
21h 45m1 stop
Avianca Logo
4:45 pm - 5:35 amEZE-IAD
13h 50m1 stop
$649Avianca
Find Deal
Booking Insights

KAYAK's insights & trends for Washington, D.C. to Buenos Aires flights

Get data-powered insights and trends into flights from Washington, D.C. to Buenos Aires to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Washington, D.C. to Buenos Aires?

The average price of all round-trip flights from Washington, D.C. to Buenos Aires Ministro Pistarini Airport clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to Buenos Aires on a Tuesday and more expensive on a Friday. On your return trip to Washington, D.C., you should consider flying back on a Thursday, and avoid Saturdays for better deals.

What is the cheapest month to fly from Washington, D.C. to Buenos Aires Ministro Pistarini Airport?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Washington, D.C. to Buenos Aires Ministro Pistarini Airport, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Washington, D.C. to Buenos Aires Ministro Pistarini Airport is September, where tickets cost $697 (return) on average. On the other hand, the most expensive months are December and February, where the average cost of round-trip tickets is $1,166 and $1,025 respectively.

How far in advance should I book a flight from Washington, D.C. to Buenos Aires Ministro Pistarini Airport?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Washington, D.C. to Buenos Aires Ministro Pistarini Airport, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Washington, D.C. to Buenos Aires Ministro Pistarini Airport, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 18 weeks before departure.

Good to know

Low seasonAugust
Cheapest flight$255
Best time to beat the crowds but there is an average 2% increase in price.
Most popular time to fly with an average 30% increase in price.
Flight from Baltimore to Buenos Aires

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

Are your dates flexible? Find out the best times to travel from Washington, D.C. to Buenos Aires based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Washington, D.C. to Buenos Aires flights

  • What is the cheapest flight from Washington, D.C. to Buenos Aires Ministro Pistarini Airport?

    In the last 3 days, the lowest price for a flight from Washington, D.C. to Buenos Aires Ministro Pistarini Airport was $255 for a one-way ticket and $600 for a round-trip.

  • Do I need a passport to fly between Washington, D.C. and Buenos Aires?

    Yes, you'll most likely have to show a valid passport before boarding the plane in Washington, D.C. and on arrival in Buenos Aires.

  • Which airports will I be using when flying from Washington, D.C. to Buenos Aires?

    On your way to Buenos Aires, you’ll fly out from one of these Washington, D.C. airports: Washington, D.C. Reagan-National or Washington, D.C. Dulles Intl. You’ll be landing at Buenos Aires Ministro Pistarini.

  • Which aircraft models fly most regularly from Washington, D.C. to Buenos Aires?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Washington, D.C. to Buenos Aires?

    oneworld, SkyTeam, and Star Alliance are the airline alliances operating flights between Washington, D.C. and Buenos Aires, with oneworld being the most commonly used for this route.

  • What is the most popular layover when flying to Buenos Aires from Washington, D.C.?

    Bogotá is the most popular layover city among KAYAK users traveling from Washington, D.C. to Buenos Aires.

  • Which is the best airline for flights from Washington, D.C. to Buenos Aires, Delta or Copa Airlines?

    The two airlines most popular with KAYAK users for flights from Washington, D.C. to Buenos Aires are Delta and Copa Airlines. With an average price for the route of $970 and an overall rating of 7.9, Delta is the most popular choice. Copa Airlines is also a great choice for the route, with an average price of $749 and an overall rating of 7.6.

  • How does KAYAK find such low prices on flights from Washington, D.C. to Buenos Aires?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Washington, D.C. to Buenos Aires.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington, D.C. to Buenos Aires?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Buenos Aires from Washington, D.C. is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Washington, D.C. to Buenos Aires?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Buenos Aires with an airline and back to Washington, D.C. with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington, D.C. to Buenos Aires?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Buenos Aires from Washington, D.C. up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 5 airlines serving from Washington, D.C. to Buenos Aires

 
See real verified KAYAK customer reviews for airlines flying from Washington, D.C. to Buenos Aires. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Washington, D.C. to Buenos Aires? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
DeltaOverall score based on 8007 reviews
8.1Boarding
7.9Entertainment
7.3Food
7.9Comfort
8.5Crew
Airline reviews

Good seats in Main cabin, excellent service and excellent landing

10.0 ExcellentAnonymous, Dec 2025SEA - MSP
Read more Delta reviews

Good seats in Main cabin, excellent service and excellent landing

My flight was cancelled with no explanation after I had already cleared security. I was given 4 options to rebook, only one being non-stop like I had paid for. I grabbed it. It was 4 plus hours later and then took off even later. Biggest complaint is that I booked early and had an aisle seat. They gave me a "window" seat in front of the exit row, so the seat did not decline. I weigh all of 103 #s and it was tight for me! For what I paid, I feel I was kind of ripped off. I think they should have given me the empty comfort seat for the inconvenience. There was no apology nor any explanation as to why the flight was cancelled. My guess is it benefitted Delta in some way.

Very smooth, on-time, and pleasantly uneventful flight. The team at the gate and on board were professional and genuinely courteous. The pilot kept us well updated throughout, and both takeoff and landing were steady and enjoyable without any drama. Just a good, solid flight. Thank you! 💗

Staff was exceptional! Everyone was kind, professional and friendly making the trip very pleasant. Thank you!

No lunch on a x-country flight scheduled for 10:50 am departure, arrived 5+ hrs later. That requires a black box label before you pay for the tickets. Worst, when I checked in online, it's specifically said that lunch was served on his flight for economy Plus passengers.

We had a lot of really rough weather but that was not Delta's fault. Pilot was amazing.

First, Delta needs more flights to/from Miami. Second, a 1000pm leaving at 1230pm is unacceptable from their biggest airport world hub. Another aircraft could have been used such as the aircraft scheduled to be used in the morning for that exact same route. Yes, I did get me there but the lack of sleep the next day didn't help me enjoy my entire trip since I was busy with activities during the weekend. This can be and is expected from Spirit (going bankrupt) and Frontier (despite they're nickel and dimers). But from Delta's World Hub? That's totally unacceptable!

This flight was straightforward and without difficulty. Service was OK, but I continue to be underwhelmed by level of attention given to Sky Priority passengers.

It would’ve been nice for all that money to have a more substantial snack for free. I remember once upon a time getting a very nice turkey sandwich with Swiss cheese on whole wheat bread for no charge along with a drink. I guess those days are gone. it’s a little insulting being given a cookie or a bag of baked chips Going forward I’ll just bring my own.

Great. Seamless. Check in agent at kiosk international was amazing and extremely helpful.

I always enjoy flying Copa. There are very few airlines where I can enjoy a comfortable sleep in-flight. The snacks weren't the best, but they sufficed. The in-flight entertainment was fantastic, and I crossed another movie off my watch list.

Very strict carry on rules meant most of the plane had to gate check their luggage. As is often the case had things that were broken because of this, but I appreciated not being charged to gate check. Otherwise good flight and great crew once on the plane

Some of the Air hostesses are not that friendly. Need improvement

I liked the meatloaf the chicken was awful but the plane was on time and got there and the staff was nice.

They were super friendly bumped me up to exit row free of charge, All flight legs were on time

Boarding was quick & efficient; they gave boarding groups due priority; staff & air crew were very cordial and helpful, pleasant flight.

Cops Airlines is fantastic! The level of care and professionalism provided by the entire crew was top rate.

We had a great flight just wished they had a tv so we can see a movie that would of made my trip excellent.

Very happy with my flight. I would definitely recommend it.

Did upgrade, travel in business it was great (more room I could sleep)

Starlink wifi on the Embraer E175 is an excellent experience. I was able to connect and work from IAD all the way to approach into BTV.

7 hours delayed due to operational issues on United’s end. Basically laziness.

Short flight but an "eager to help" crew made the journey more enjoyable!

During booking, I kept trying submitting my payment from the Mexican website and it didn't work. After I had the idea to change it to the Canadian website, it worked but I had to be charged the equivalent of 50 CAD more. I received the clear instruction that I would only be able to check-in at the airport and that it was impossible to select a seat 24 hours before departure, that I had to pay 144 CAD to do so, although not only was I able to check-in 24 hours before departure, but I could have selected my seats for free then. All in all, I almost threw $200 out the window due to misleading information. Besides, the app kept crashing, the information to get to the gate on the app was inaccurate, my gate was switched and I was only informed once in the air (luckily I had noticed the departure pannel), I was not addressed in my language beforehand and even if I tried I was immediately answered in English (which meant the crew understood but didn't want to answer accordingly), there was only one snack & beverage service on my medium haul flight and no beverage service on my short haul flight. To be fair, the planes were comfortable, the crew apart from the language issue was helpful, dynamic and engaging, the plane was clean and the directions were clear and direct. United has a lot of potential to be one of my favourite airlines, but the devil is in the details and a lot of them missed the target.

Better WiFi. I cannot understand that in 2025, United is so behind on a technology that is now a necessity and still painfully unreliable, slow and keeps disconnecting.

Great service on board. Boarding a bit slow due to process. Food was pretty average.

Very small cramped plane for an international flight. Everything else was good, but it was maybe the smallest comfort-wise I've ever been on for longer than 3-4 hours and the trip was 7.5

Flight was delayed 3 hours. No food and drink vouchers was provided. They offered a mini pretzel bag and water .

Staff was rude. Didn’t give water for 2 hours. Worst service

Was on time until within 1 hour of flight-how does that happen? Staff very friendly.

After arriving in Dallas, the aircraft taxied for an unusually long time and was unable to park at the gate, which caused a significant delay and made me miss my connecting flight. I then had to wait in a very long line to be rebooked, and I was told that no hotel or meal accommodations would be provided. What is even more unacceptable is that my luggage was mishandled and has still not been located. My suitcase contains important medications that I urgently need, and I have been unable to access them due to the airline’s mishandling. This situation has caused me considerable stress and inconvenience, and I need this issue to be resolved immediately.

RIC Staff was not enough. Elderly passengers had to wait 30 minutes to deplane, so we could board and still had to walk as no chairs were provided. And, passenger in front of my seat assignment rammed seat against my legs entire flight time. Was mildly bruised and left thigh still sore.

Liked that it was on time. Staff professional and friendly.

Things were delayed a little. But that didn’t affect my plans. It was fine. I was surprised it was so full thanksgiving day. The crew were friendly and professional.

I appreciated that it was on time, safe and professional. I didn’t like that I wasn’t in a place where I had a window at my window seat. It would have been nice to know that in advance. If it was mentioned in the ticketing, I didn’t notice it.

My flight was delayed about three hours. I got home at 3:30 in the morning very bad experience.

We were told the flight was delayed 5 times, then it was moved to the next day.

Flight delay was communicated before leaving for airport which caused it to be a non-event. Great flight and crew!

The flight attendant, a black woman with curly hair who sat near Row 21, was wonderful and kind.

It took way too long to diagnose and solve the problem of a broken crew member cabin seat. Though compensation for the volunteer who left the flight was very kind.

I like the crew they're very friendly. I don't like. on five hour flight they not offered snacks. Any drink. Not even coffee

Not even water is offered on the flight. You cannot lean back on the seats and the seats are so narrow you can’t avoid rubbing elbows with the person next to you.

I couldnt recline the seat. Other than that crew was very attentive and helpful. Thsnk you

I had to go to the boarding counter for them to enter my return flight as it’s not with Avianca. There was a long queue as there were lots of people being called to the counter.

This low cost airline looks and fells more like a local bus. In a 6 hour flight not being able to recline a seat is torture. The only thing available with no charge is a glass of water provided by, mostly, rude staff. Our luggage didn’t arrive

6 hour flight and have to pay for everything 100 dollars to add a carry-on bag is insane

Did not fly with Pakistan International Airlines. Have never flown with Pakistan International Airlines.

Boarding, crew were excellent, food was ok and entertainment need to improve

The seats were uncomfortable and barely reclined at all. Very little leg room despite being business class. The crew was friendly and the food was good. Had to use my own phone for in-flight entertainment.

why did we have to go through security mid flight

Everything you need to know for your flight from Washington, D.C. to Buenos Aires

Information on your arrival and departure airports