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Cheap Flights from Washington Dulles to Buenos Aires

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      Travellers and cabin class, 1 Adult, Economy

      Compare Washington Dulles to Buenos Aires flight deals

      Find the cheapest month or even day of the year to fly to Buenos Aires

      Book the best Buenos Aires fare with no extra fees

      Flight deals from Washington Dulles to Buenos Aires

      Looking for a cheap last-minute deal or the best return flight from Washington Dulles Airport to Buenos Aires? If you want to travel next month, return fares start from R 10,845. Find the lowest prices on one-way and return tickets right here.
      Buenos Aires.R 3,686 per passenger.Departing Thu, 1 Oct.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Washington Dulles on Thu, 1 Oct, arriving in Buenos Aires Ministro Pistarini.Price includes taxes and charges.From R 3,686, select.
      Buenos Aires.R 4,308 per passenger.Departing Thu, 17 Sep.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Washington Dulles on Thu, 17 Sep, arriving in Buenos Aires Ministro Pistarini.Price includes taxes and charges.From R 4,308, select.
      Buenos Aires.R 4,850 per passenger.Departing Thu, 13 Aug.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Washington Dulles on Thu, 13 Aug, arriving in Buenos Aires Ministro Pistarini.Price includes taxes and charges.From R 4,850, select.
      Buenos Aires.R 5,060 per passenger.Departing Wed, 5 May.One-way flight with United.Outbound indirect flight with United, departs from Washington Dulles on Wed, 5 May, arriving in Buenos Aires Ministro Pistarini.Price includes taxes and charges.From R 5,060, select.
      Buenos Aires.R 5,060 per passenger.Departing Mon, 26 Apr.One-way flight with United.Outbound indirect flight with United, departs from Washington Dulles on Mon, 26 Apr, arriving in Buenos Aires Ministro Pistarini.Price includes taxes and charges.From R 5,060, select.
      Buenos Aires.R 5,063 per passenger.Departing Wed, 11 Nov.One-way flight with Copa.Outbound indirect flight with Copa, departs from Washington Dulles on Wed, 11 Nov, arriving in Buenos Aires Ministro Pistarini.Price includes taxes and charges.From R 5,063, select.
      Buenos Aires.R 5,066 per passenger.Departing Thu, 31 Dec.One-way flight with Copa.Outbound indirect flight with Copa, departs from Washington Dulles on Thu, 31 Dec, arriving in Buenos Aires Ministro Pistarini.Price includes taxes and charges.From R 5,066, select.
      Buenos Aires.R 5,066 per passenger.Departing Fri, 1 Jan.One-way flight with Copa.Outbound indirect flight with Copa, departs from Washington Dulles on Fri, 1 Jan, arriving in Buenos Aires Ministro Pistarini.Price includes taxes and charges.From R 5,066, select.
      Buenos Aires.R 5,128 per passenger.Departing Tue, 23 Feb.One-way flight with LATAM Airlines.Outbound indirect flight with LATAM Airlines, departs from Washington Dulles on Tue, 23 Feb, arriving in Buenos Aires Jorge Newbery.Price includes taxes and charges.From R 5,128, select.
      Buenos Aires.R 5,129 per passenger.Departing Sun, 28 Mar.One-way flight with Delta.Outbound indirect flight with Delta, departs from Washington Dulles on Sun, 28 Mar, arriving in Buenos Aires Jorge Newbery.Price includes taxes and charges.From R 5,129, select.
      Buenos Aires.R 5,450 per passenger.Departing Wed, 15 Jul.One-way flight with Copa.Outbound indirect flight with Copa, departs from Washington Dulles on Wed, 15 Jul, arriving in Buenos Aires Ministro Pistarini.Price includes taxes and charges.From R 5,450, select.
      Buenos Aires.R 5,451 per passenger.Departing Tue, 1 Jun.One-way flight with Copa.Outbound indirect flight with Copa, departs from Washington Dulles on Tue, 1 Jun, arriving in Buenos Aires Ministro Pistarini.Price includes taxes and charges.From R 5,451, select.

      Find the cheapest month to fly from Washington Dulles to Buenos Aires

      We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Washington Dulles to Buenos Aires flights are currently cheapest in October.
      Jul
      from R 5,450
      Aug
      from R 4,850
      Sep
      from R 4,308
      Oct
      from R 3,686
      Nov
      from R 5,063
      Dec
      from R 5,066
      Jan
      from R 5,066
      Feb
      from R 5,128
      Mar
      from R 5,129
      Apr
      from R 5,060
      May
      from R 5,060
      Jun
      from R 5,451

      Alternative Washington Dulles to Buenos Aires routes

      Looking for the cheapest, fastest or easiest route from Washington Dulles to Buenos Aires? You could fly into the following airports instead.

      Buenos Aires Jorge Newbery

      7km from central Buenos Aires
      Closest
      from R 4,753
      Search flights

      Buenos Aires Ministro Pistarini

      28km from central Buenos Aires
      Cheapest
      from R 3,700
      Search flights

      Washington D.C. to Buenos Aires: Flight information

      The things to know before you go.
      Cheapest flight foundR 3,700
      Cheapest month to flyOctober

      Finding cheap flights from Washington Dulles to Buenos Aires: Frequently asked questions

      There are 2 airports in Buenos Aires: Buenos Aires Jorge Newbery and Buenos Aires Ministro Pistarini.
      The best price we found for a return flight from Washington Dulles to Buenos Aires is R 10,803. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
      Currently, there are no airlines that fly direct from Washington Dulles to Buenos Aires. But we found flights with one or more stops from R 10,803.
      As of July 2026, there are no flights flying from Washington Dulles to Buenos Aires.
      The cheapest month to fly from Washington Dulles to Buenos Aires is usually August.
      If you're flying from Washington Dulles Airport, the cheapest airport near Buenos Aires is Buenos Aires Ministro Pistarini – which is 27.7 km away from the centre of Buenos Aires. We've found flights into this airport from R 10,803.
      After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Washington Dulles Airport to Buenos Aires on Thursday, 13 August 2026.
      No airlines currently offer direct flights between Washington Dulles Airport and Buenos Aires. Most routes have one or more stops.
      We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Buenos Aires but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

      We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Buenos Aires is around 40 days in advance, so don’t leave your flight to the last minute.

      In July, the average temperature is usually around 10°C. January is typically the warmest month in Buenos Aires, when it usually averages around 30°C. You can expect the least rain in June. The coldest month is July, with temperatures averaging 6°C. The rainiest month is March.
      Currently, Frontier Airlines offers the cheapest flight tickets to Buenos Aires.

      Travelling from Washington Dulles International Airport (IAD) to Buenos Aires: what you need to know

      • Buenos Aires is two hours ahead of Washington DC, where Washington Dulles International Airport is located. Buenos Aires follows the UTC-3 timezone.

      • For a smooth journey, arrive at the airport two hours ahead of international flights and an hour before domestic departures. This will give you plenty of time to board your IAD to Buenos Aires flight.

      • During popular months such as June, it's a good idea to get to the airport even earlier. Plan to arrive two hours before a domestic departure and four hours ahead of international flights whenever you're travelling during a peak period in general.

      • A stopover is the ideal opportunity to take a break from travelling and maybe even visit a new city. When searching for plane tickets from IAD to Buenos Aires, deselect the 'Direct flights only' box to see where you can stop along the way. Some popular options include:

        • Dallas Fort Worth International Airport (DFW)

        • Bogota El Dorado International Airport (BOG)

        • Panama City Tocumen International Airport (PTY)

      • The journey from central Washington DC to IAD takes about 1 hour 10 minutes on public transport. If you ride-share, drive or grab a taxi, you'll cover the 40 kilometres in 45 minutes or so, depending on traffic.

      • In search of a hotel close to IAD? If you're catching an early flight from Washington Dulles International Airport to Buenos Aires, these accommodation options will put you moments from your departure gate:

      • Of the departures from Washington Dulles International Airport, 77% arrive as scheduled at their destination.

      • The address for IAD is 1 Saarinen Circle.

      How to find the cheapest flights from Washington Dulles International Airport (IAD) to Buenos Aires

      • R 3,686 is the lowest price we've seen for a one-way Washington Dulles International Airport to Buenos Aires flight. A round-trip plane ticket right now is R 10,845. Depending on how early you book and the availability, these fares may change.

      • To find cheap flights from IAD to Buenos Aires, book as early as possible. Airlines typically offer lower prices when flights first go on sale.

      • Finding cheap tickets from Washington Dulles International Airport to Buenos Aires is more likely if you're flexible with your travel dates. Use the 'Whole month' search function to get the best prices across every month and pick up an awesome deal.

      • You don't need to check every day to see if fares have dropped when you set up a Price Alert. We'll update you the moment there's an updated deal for cheap flights from IAD to Buenos Aires.

      • Select your preferred departure and arrival times, airlines and number of stops with our filters. Then, sort the results for your flight from Washington Dulles International Airport to Buenos Aires by 'Cheapest,' 'Fastest' or 'Best.'

      Airports in Buenos Aires

      Buenos Aires Jorge Newbery Airfield (AEP)

      • The distance from Buenos Aires Jorge Newbery Airfield (AEP) to central Buenos Aires is roughly 8 kilometres. It takes around 25 minutes to get to the centre driving.

      • It takes around 40 minutes if you're using public transport.

      • Consider booking a hotel near AEP if you're coming in on a late flight from Washington Dulles International Airport to Buenos Aires. Check in to one of these accommodation options and skip the long transfer:

      • For the best deal, reserve your vehicle from Buenos Aires Jorge Newbery Airfield about one week ahead of your flight from IAD to Buenos Aires.

      Buenos Aires Ministro Pistarini Intl Airport (EZE)

      • Central Buenos Aires is about 32 kilometres from Buenos Aires Ministro Pistarini Intl Airport (EZE). Once your flight from Washington Dulles International Airport to Buenos Aires has hit the runway and you've made your way to arrivals, expect a drive of about 30 minutes.

      • If you travel by public transport, the ride to the centre will take you 1 hour 15 minutes or so.

      • After stepping off your IAD to Buenos Aires flight, settle in at a hotel near EZE. These are some great accommodation options that'll help you get into relaxation mode:

      • Get first dibs on the best options. Securing your ride from EZE one week in advance often means lower prices and a wider selection of vehicles.

      Best time to go to Buenos Aires

      • December is the quietest month for flights from Washington Dulles International Airport to Buenos Aires, while September is the most popular. Figure out the ideal time to visit Buenos Aires based on whether you like a laid-back vibe or a more bustling atmosphere.

      • The warmest month in Buenos Aires is January, with temperatures ranging between 18ºC (64ºF) and 32ºC (90ºF). Lock in your Washington Dulles International Airport to Buenos Aires plane ticket then if that's your ideal forecast.

      • July has average temperatures of between 5ºC (41ºF) and 16ºC (61ºF). Look for a cheap ticket from IAD to Buenos Aires around that time if you like travelling in cooler conditions.

      More about Buenos Aires

      • When it comes to looking for somewhere to rest your head, you'll find the best places to stay in Buenos Aires right here. Check out these hotels after you've booked your flight from Washington Dulles International Airport to Buenos Aires:

      • El Ateneo Grand Splendid and Teatro Colon are just two of the major attractions to put on your Buenos Aires must-do list. Keep the adventure rolling by checking out Recoleta Cemetery.

      Explore more of Argentina

      • Buenos Aires has plenty to offer, but there are so many other corners of Argentina waiting to be discovered. Around 274 kilometres northwest of Buenos Aires, a visit to Rosario will keep you on the go. Don't miss top attractions like Casa Natal Che Guevara, Monumento al Che Guevara and Casa Natal de Lionel Messi.

      • Mar Del Plata is another standout destination in Argentina and is around 386 kilometres south of Buenos Aires. No journey is complete without experiencing Teatro Colon, Playa Popular and Aquasol Water Park.

      Plan the rest of your trip from Washington D.C. to Buenos Aires

      Prices shown on this page are estimated lowest prices only. Found in the last 12 days.