LHR - BUE

£531 Find Cheap Flights from London Heathrow Airport 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 Heathrow to Buenos Aires departing on 31/12. 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

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

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Buenos Aires.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Buenos Aires.
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Flight Deals

Cheap Flights from Heathrow to Buenos Aires (LHR-BUE)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Heathrow 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 return flight deals from Heathrow to Buenos Aires

Wed, 24 Sep - Thu, 9 Oct
Avianca Logo
22:05 - 15:20LHR-EZE
21h 15m1 stop
Avianca Logo
01:40 - 15:35EZE-LHR
33h 55m1 stop
£703Avianca
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Wed, 12 Nov - Sun, 23 Nov
Avianca Logo
21:40 - 05:50LHR-EZE
35h 10m1 stop
Avianca Logo
01:40 - 14:35EZE-LHR
33h 55m1 stop
£704Avianca
Find Deal
Thu, 13 Nov - Mon, 24 Nov
Avianca Logo
21:40 - 05:50LHR-EZE
35h 10m1 stop
Avianca Logo
01:40 - 14:35EZE-LHR
33h 55m1 stop
£707Avianca
Find Deal
Wed, 25 Feb - Mon, 9 Mar
Avianca Logo
21:40 - 15:50LHR-EZE
21h 10m1 stop
Avianca Logo
16:55 - 14:35EZE-LHR
18h 40m1 stop
£707Avianca
Find Deal
Thu, 30 Oct - Thu, 27 Nov
Avianca Logo
21:40 - 05:50LHR-EZE
35h 10m1 stop
Avianca Logo
07:35 - 14:35EZE-LHR
28h 00m1 stop
£712Avianca
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Sat, 25 Oct - Sun, 9 Nov
Lufthansa Logo
14:50 - 06:20LHR-EZE
43h 30m2 stops
Lufthansa Logo
22:05 - 10:15EZE-LHR
33h 10m1 stop
£754Lufthansa
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Sat, 25 Oct - Sun, 23 Nov
United Airlines Logo
16:40 - 08:20LHR-EZE
43h 40m2 stops
United Airlines Logo
23:55 - 07:30EZE-LHR
28h 35m1 stop
£783United Airlines
Find Deal
Sat, 25 Oct - Tue, 11 Nov
United Airlines Logo
16:40 - 06:20LHR-EZE
41h 40m2 stops
United Airlines Logo
23:55 - 07:30EZE-LHR
28h 35m1 stop
£784United Airlines
Find Deal
Tue, 10 Mar - Tue, 24 Mar
LATAM Airlines Logo
18:45 - 14:40LHR-AEP
22h 55m2 stops
LATAM Airlines Logo
12:40 - 14:05AEP-LHR
22h 25m1 stop
£843LATAM Airlines
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Tue, 10 Mar - Tue, 17 Mar
LATAM Airlines Logo
15:45 - 14:40LHR-AEP
25h 55m2 stops
LATAM Airlines Logo
18:20 - 14:05AEP-LHR
16h 45m1 stop
£852LATAM Airlines
Find Deal

Everything you should know

Top airlines
Avianca
Cheapest • from £703 (return)
Finnair
Best reviews • 7.6 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Top routes
LHR-EZE
Cheapest
LHR-EZE
Most popular
Insights
Insights
Insights
Insights
When to book
2 weeks
in advance
Our data shows that travellers who book at least 2 weeks in advance save around 12% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
January
Cheapest • 12% price drop
December
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest return fare
£703
Typical prices: £826-1131
Avianca
Wed 24/9Thu 9/10
LHR - EZE • 1 stop
Cheapest direct flights
£1,236
Typical prices: £855-1829
British Airways
Tue 18/11Tue 2/12
LHR - EZE • Direct
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KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you love your trip to Buenos Aires!
Booking Insights

KAYAK's insights & trends for Heathrow to Buenos Aires flights

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

How much is a return flight from London Heathrow Airport to Buenos Aires?

What is the cheapest London Heathrow Airport to Buenos Aires flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest return flight from London Heathrow Airport to Buenos Aires costs £1,068 on the route between London Heathrow Airport (LHR) and Buenos Aires Ministro Pistarini Airport (EZE). It is also the most popular route.

What’s the cheapest day of the week to fly from London Heathrow Airport to Buenos Aires?

The average price of all round-trip flights from London Heathrow Airport to Buenos Aires clicked on KAYAK for each day over the last 12 months.

For London Heathrow Airport to Buenos Aires, Tuesday is the cheapest day to fly on average and Friday is the most expensive. Flying from Buenos Aires back to London Heathrow Airport, the best deals are generally found on Monday, with Thursday being the most expensive.

What is the cheapest month to fly from London Heathrow Airport to Buenos Aires?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from London Heathrow Airport to Buenos Aires, 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 London Heathrow Airport to Buenos Aires is January, where tickets cost £848 (return) on average. On the other hand, the most expensive months are December and August, where the average cost of round-trip tickets is £1,300 and £1,091 respectively.

How far in advance should I book a flight from London Heathrow Airport to Buenos Aires?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from London Heathrow Airport to Buenos Aires, 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 London Heathrow Airport to Buenos Aires, you should book around 2 weeks before departure, which saves you about 12% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 25 weeks before departure.

Good to know - Cheap tickets from London Heathrow Airport to Buenos Aires

Low seasonJune
Cheapest flight£531
Best time to beat the crowds (6% less expensive on average)
Most popular time to fly (34% more expensive on average)
Flight from London Heathrow Airport to Buenos Aires Jorge Newbery

When to book flights from Heathrow to Buenos Aires

Are your dates flexible? Find out the best times to travel from Heathrow to Buenos Aires based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or returns 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 London Heathrow Airport to Buenos Aires flights

  • What is the cheapest flight from London Heathrow Airport to Buenos Aires?

    In the last 3 days, the lowest price for a flight from London Heathrow Airport to Buenos Aires was £719 for a one-way ticket and £952 for a return.

  • Which airports will I be using when flying from London Heathrow Airport to Buenos Aires?

    When flying out of London Heathrow Airport you will be using London Heathrow. You will be landing at one of these airports: Buenos Aires Jorge Newbery or Buenos Aires Ministro Pistarini.

  • Which aircraft models fly most regularly from London Heathrow Airport to Buenos Aires?

    The Boeing 777 is the aircraft model that flies most regularly on the London Heathrow Airport to Buenos Aires flight route.

  • Which airline alliances offer flights from London Heathrow Airport to Buenos Aires?

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

  • Which is the best airline for flights from London to Buenos Aires, Finnair or LATAM Airlines?

    The two airlines most popular with KAYAK users for flights from London to Buenos Aires are Finnair and LATAM Airlines. With an average price for the route of £853 and an overall rating of 7.6, Finnair is the most popular choice. LATAM Airlines is also a great choice for the route, with an average price of £957 and an overall rating of 7.5.

  • How does KAYAK find such low prices on flights from London Heathrow Airport 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 London Heathrow Airport to Buenos Aires.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from London Heathrow Airport to Buenos Aires?

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

  • What is the Hacker Fare option on flights from London Heathrow Airport to Buenos Aires?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to Buenos Aires with an airline and back to London Heathrow Airport with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from London Heathrow Airport 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 London Heathrow Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from London Heathrow Airport to Buenos Aires

  • Looking for a cheap flight from Buenos Aires to London Heathrow Airport? 25% of our users found flights on this route for Buenos Aires or less round-trip.

Reviews of the top 5 airlines flying from Heathrow to Buenos Aires

 
See real verified KAYAK customer reviews for airlines flying from London 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 Heathrow 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.
7.6
FinnairOverall score based on 1323 reviews
6.9Entertainment
7.6Boarding
7.5Comfort
8.1Crew
6.7Food
Airline reviews

Great. It was awesome to have boarding from the front and back of the plane as it made the process go very quickly

10.0 ExcellentSarah, Aug 2025CPH - HEL
Read more Finnair reviews

Great. It was awesome to have boarding from the front and back of the plane as it made the process go very quickly

Wish that everyone would board the back of the plane first. Also let kids on first. The gate wasn’t open at arrival and we waited 45 minutes to takeoff. They made up for time in the air.

This was an absolutely exceptional flight. The flight attendants were extremely attentive and very friendly. They seemed to go out of their way to make us comfortable and to make sure that we had everything we needed., We were in business and were very happy with the size and the details for our pods. We would definitely recommend Finnair and will definitely be flying with them again.

We had an excellent trip with Finnair. This was our first time and we’re very pleased. The only issue was with the boarding - it was a little bit confusing and needs a little bit of streamlining.

Crew very lovely. Arrived an hour late due to bad weather. We were given new tickets to an other flight but it could have been organised better, so we did not have to run through the whole airport to.

Flight delayed over an hour. They said they would hold our connection but then did not.

Major problems checking in at Alaska counter. They could not find our booking code because it came from Finnair.

Do not use KAYAK or Finair for future travel. Unless you purchase the tickets directly from the airline, you were going to have a difficult time checking in. Kayak canceled my flights twice and ended up causing great difficulty in me getting back from Europe because they double sold my tickets between American Airlines and Finair. The event caused significant delays and led to me having to rebook my flights.

The staff were all particularly great. The plane was clean and fresh. The bassinet worked great. It was all very nice.

Boarding uncomfortable. Stewardess said I would have to check my carry on as there was no room in the overhead bins. Another passenger helped me find a spot.

I’m entitled to a refund per LATAM due to the mid flight itinerary change and being stuck in São Paulo for 24 hours and needing to get a hotel. The airline was dismissive and of no help.

The flight was late. Please do not delay next time.

I couldn't travel, now I can't get a refund and to change the date I have to pay an absurd fine.

Boarding was confusing with a delayed flight because there was no English translation

My biggest complaint is the comfort. I am not tall and there was no legroom. It was very uncomfortable. During my transfer in Sao Paola, the flight was slightly delayed so boarding was confusing because there were no instructions in English.

Bought a ticket that included a bag and they still charged me to check it in, latam is the worst airline.

I never got this flight. You sent me to Chile!!! And from Chile I got the other flight to São Paulo... I've arrived 7h latter than I was supposed to arrive because of Delta delays.

My entertainment did not work. I was very tired from the botched connection, and the poor sleep

It’s a delta flight operated by LATAM. The whole ticket sale is a mess, delta changed my flight but didn’t update it in LATAM system, I couldn’t get my boarding pass, it took me hours to resolve this issue with delta. I had to change my travel plan. No apology from Delta even though it’s their fault.

Boarding was done by woman who insisted on strict standing in line policy; food was ok; entertainment minimal

Good Poor. service onboard No food. Low quality for economy plus

Basic service for a decent price, all amenities are à la cart

Delayed and missed connections on leaving the states and returning Planes were old and small- very uncomfortable. Meals were good but very infrequent service for even water/drinks. No explanations for 3+ hour delay

There's not enough leg room in economy class. The seats are very narrow as well.

Bag misplaced. Iberia claims bag has been forwarded. But AirTag shows that the bag is still in Madrid.

Charging $300 to be able to pick a seat next to your wife was nothing less than extortion.

I’m very mad because I paid an extra $105 to change seats to an exit row with more leg room. The app clearly showed a gap in between the seats in the row I changed my seat to and I paid for it. When I boarded the plane, it wasn’t an exit row seat and no more room than my original seat. I feel like I was ripped off $105.

I had a great experience , crew was great and enjoyed the entertainment options I will be booking my next International trip with them .

Front desk was closed at 6 pm, I was unable to get my boarding pass and as such missed my connecting flight home.

business class food was pretty average otherwise it was a good experience

everything was perfect! plus so much leg room w all the empty seats near me :)

Efficiency of staff, and comfort and cleanliness of aircraft was all great. Maybe a hot drink without payment at that time in the morning would be good!

Flight was late arriving. So, we left 25 min late. Pilot made some time up during the flight. Therefore, we arrived alittle past original time.

The plane was late (as was my flight out from Birmingham the day before)

It was freezing. I asked crew member for a blanket and was told it might be in front of plane but I never got one. I turned off all the vents but still froze.

This is one of the best flights i had. Good boarding, good seats , good food, and nuce stuff and clean toilets I took the Tourist upgrade and indianischer food , the best.

The flight was delayed by an hour. Made the connection uncomfortably tight.

The experience was great. A330 needs an upgrade between RDU and FRA and vice-versa.

When we went to the lounge they told us to go into the main lounge and not the full business class section, later they told me that Lufthansa wont pay the full fee to alloq the business class passengers entry to the nicer sectikn where all the other airlines nusiness class passengers go into. Very poor arrangement.

Not what I expected for the last leg of a $5100 business class experience. Boarding was a nightmare. The flight was delayed and I had to keep checking my email to ensure I was at the right gate since the airline or the terminal had no clue until 15 mins prior to boarding. Food was gross, limited drink options.

what would have been better would have been that my booking not been canceled by the system and had I been informed that the booking had been cancelled by the system I could have immediately rebooked and not found out that there was an issue when I was told by the system that I needed to book in. It would have also been good if either the booking agent or BA or anyone been in anyway useful. In the end I had to rebook a flight at an additional cost of $350. So no I'm not impressed by BA any of the other parties involved.

Boarding was poor. Why are first class passengers not boarded first?! Bus to the plane and then held on a packed bus because we were waiting for people on the bus before to finish boarding. Seat belt on the fist clas seat is very uncomfortable, cutting into your neck. Other than that crew, seating and food were all excellent. Entertainment, as usual - rubbish.

The flight was fine but no food available apart from snacks like Pringles and olives which was a problem for me as I hadn’t eaten anything that day. But the worst problem was BA left 24 suitcases in Heathrow as the flight was too full but didn’t tell anyone. So we waited for ages at Toulouse airport with no information and finally found out from the one member of staff in the baggage collection area who explained what had happened and apologised for no announcement being made but said that was their policy. Then BA contacted me today to say they have found my luggage and can deliver it to me on Tuesday - half way through my holiday!!!! So a friend has had to make a four hour round trip in his car to go and collect the luggage from the airport so we can get it today. A TOTAL SHAMBLES AND DISREGARD BY BA FOR THEIR PASSENGERS’ BEST INTERESTS.

Much much better than my previous times on British Airways the food was spot-on and the service was really genuine and attentive

Flight was delayed but my previous flight was as well so It worked to my advantage. This was my first time in first class. I don't think they ever stopped feeding us. The seating area was very spacious and comfortable. The attendants were wonderful, warm, friendly and very personable.

First time on BA but will fly with them from now on! Everything about the flight was superb!!!

Horrible experience. They broke the handle of my checked in suitcase and then refused pay for damages

We had a pretty good experience. Enjoyed both the flights. Crew was very good and helpful.

The flight was very delayed in taking off - which was out of control of the crew, but then the pilot worked hard so we only arrived about 30 minutes late. Everyone was very friendly and accommodating!

They issued seat assignments and sat my 2 year-old in the row behind me, separate from me and my daughter. Communication/ customer service was terrible. They told me to change it in London, then in London, they told me to talk to the cabin crew, then a supervisor came and stuck us in the back of the plane when we were supposed to be in row 25. Overall, they need to really work on their customer service. Additionally the food was terrible and they ran out of meals and didn’t have any kid options. To top it off there was no in-flight entertainment for the first hour of the trip.

Everything you need to know for your flight from Heathrow to Buenos Aires

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