LHR - BUE

£465 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 10/11. 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

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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

Thu, 26 Feb - Fri, 20 Mar
Avianca Logo
21:40 - 05:50LHR-EZE
35h 10m1 stop
Avianca Logo
16:55 - 14:35EZE-LHR
18h 40m1 stop
£807Avianca
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Sat, 7 Mar - Sat, 21 Mar
Avianca Logo
21:40 - 05:50LHR-EZE
35h 10m1 stop
Avianca Logo
16:55 - 14:35EZE-LHR
18h 40m1 stop
£808Avianca
Find Deal
Sun, 8 Feb - Wed, 18 Mar
Avianca Logo
21:40 - 05:50LHR-EZE
35h 10m1 stop
Avianca Logo
07:30 - 14:35EZE-LHR
28h 05m1 stop
£810Avianca
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Sun, 7 Dec - Sat, 20 Dec
Lufthansa Logo
16:30 - 07:55LHR-EZE
18h 25m1 stop
Lufthansa Logo
17:45 - 15:50EZE-LHR
19h 05m1 stop
£812Lufthansa
Find Deal
Tue, 9 Dec - Sat, 13 Dec
Lufthansa Logo
16:30 - 07:55LHR-EZE
18h 25m1 stop
Lufthansa Logo
17:45 - 12:50EZE-LHR
16h 05m1 stop
£818Lufthansa
Find Deal
Mon, 9 Feb - Mon, 23 Feb
Iberia Logo
18:45 - 08:40LHR-EZE
16h 55m1 stop
Iberia Logo
22:45 - 18:15EZE-LHR
16h 30m1 stop
£834Iberia
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Wed, 10 Dec - Thu, 22 Jan
Finnair Logo
11:15 - 07:05LHR-EZE
22h 50m1 stop
Finnair Logo
20:45 - 20:00EZE-LHR
20h 15m1 stop
£851Finnair
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Tue, 25 Nov - Tue, 2 Dec
LATAM Airlines Logo
20:15 - 09:40LHR-AEP
16h 25m1 stop
LATAM Airlines Logo
18:20 - 14:05AEP-LHR
16h 45m1 stop
£853LATAM Airlines
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Fri, 21 Nov - Mon, 1 Dec
Finnair Logo
16:30 - 08:20LHR-EZE
42h 50m1 stop
Finnair Logo
23:59 - 12:05EZE-LHR
33h 06m1 stop
£855Finnair
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Wed, 3 Dec - Mon, 8 Dec
LATAM Airlines Logo
20:15 - 14:00LHR-AEP
20h 45m1 stop
LATAM Airlines Logo
14:55 - 14:05AEP-LHR
20h 10m1 stop
£868LATAM Airlines
Find Deal

Everything you should know

Top airlines
Avianca
Cheapest • from £807 (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 11% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
March
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
£807
Typical prices: £788-£1,091
Avianca
Thu 26/2Fri 20/3
LHR - EZE • 1 stop
Cheapest direct flights
£987
Typical prices: £1,172-£1,572
British Airways
Wed 26/11Wed 3/12
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?

This analysis is based on the cheapest return trip price found on KAYAK in the last 12 months by searching for a flight from London Heathrow Airport to Buenos Aires departing in February.

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 £949 on the route between London Heathrow Airport (LHR) and Buenos Aires Ministro Pistarini Airport (EZE). It is also the most popular route.

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 March, where tickets cost £878 (return) on average. On the other hand, the most expensive months are December and August, where the average cost of round-trip tickets is £1,377 and £1,132 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 11% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 22 weeks before departure.

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

Low seasonJune
Cheapest flight£465
Best time to beat the crowds (3% less expensive on average)
Most popular time to fly (37% more expensive on average)
Flight from London Heathrow Airport to Buenos Aires

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 £465 for a one-way ticket and £807 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?

    SkyTeam, Star Alliance, and oneworld are the airline alliances operating flights between London Heathrow Airport and Buenos Aires, with SkyTeam 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 £878 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 £972 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 1333 reviews
7.6Boarding
8.1Crew
6.7Food
7.4Comfort
6.9Entertainment
Airline reviews

All reviews good because...flight from BWI to London ,economy seats was miserable. I usually book 1,step up from economy but this would have added 1500 bucks 1 way. Bit the bullet and upgraded for retun flight, otherwise all ratings would have been rock bottom.

8.0 ExcellentDavid, Oct 2025LHR - BWI
Read more Finnair reviews

All reviews good because...flight from BWI to London ,economy seats was miserable. I usually book 1,step up from economy but this would have added 1500 bucks 1 way. Bit the bullet and upgraded for retun flight, otherwise all ratings would have been rock bottom.

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.

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.

The assistance we received and the flight itself was wonderful. We will fly with LATAM airlines again, in the future.

we were missing our luggage, trying to find someone to have any empathy was pretty much not happening....

The plane broke down at the Lima stopover and they offered to put me on a flight the be t day but I had to be back in LA that morning and so I had to buy another ticket from Avianca and United for $2k I asked LATAM for compensation and received none. Very bad experience

Poor handling of carry on luggage. We had a 8 hour stop in Santiago, are over 70 and, in spite of paying full fare they wanted to send carry on to luggage hold. No empathy. We had to show that several group 4/5 passengers were not sending their carry ons before they finally let Is keep them. Very poor .

Really bad experience – delayed for 6 hours without any notice, no food or drinks provided, and stuck in the horrible Cartagena airport.

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

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

We were delayed 2 hours because the crew was late. They need better planning by the crew, we had to sit in uncomfortable seats waiting for them.

Difficulty to check in online, but well handled at the airport. Flight delay was unfortunate. Crew was adequate but not what we have usually experienced from BA. Seat was not comfortable.

Transportation from gate to airplane was poor we stayed in hot bus for 20 minute no vantilation

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

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.

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.

Paid for exit row at the back of the plane. Window seat with lots of leg space. Food was inedible (as usual). Brought my own.

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.

We always use BA due to the direct flight options, we have always had a pleasant flight with BA.

There might be more food options for people who can't eat so much starch/sugar/bread/rice. Meat, cheese, walnuts/pecans for snack, maybe jerky or other kinds of meat-based snacks would be better than bread and rice and sweets. I had an extra chardonnay, which was fine. The entertainment was great.

Unfortunately, my flight was cancelled because of some sort of emergency over the Atlantic and had to return to London. While I think British Airways made every effort to mitigate the situation, I must say it was still pretty unpleasant. I do appreciate the fact, however, that British Airways put my safety first…and I think the effort to correct a bad situation was very sincere. But I think the process might be handled better in future.

Horrible leg room - coach seating with empty seat in middle on a 3 across seating. You buy business class for comfort which includes leg room. Absolutely no entertainment options either. Awful experience

Crew service was poor and very little difference between premium economy and economy. Disappointed.

My bags never made it on the flight and I now have to wait for them to arrive hopefully tomorrow. You can’t even track your bags in the app to see where they are since they didn’t arrive. You have to file a claim and then wait for them to inform you when you will receive your bag. We were already delayed for an hour due to baggage so I don’t understand how my bag didn’t make the flight.

One of the worst experience given the middle seat even asked for the change no one honored,boarded at the end and overall one of the worst experience

No WiFi in either flight. No leg room, the seat in front of me left dents on my knees and the tray was so low my knees propped it up if I tried to use it.

It was good although our flight to the UK was cancelled and rescheduled for two days later. This was after we were already seated on the plane. We missed the first leg of our trip. BA did put us up at a hotel and paid for our meals but we lost our hotel costs in Glasgow.

The crew was very nice and pleasant. We were very reluctant to book our flight with British Airlines because we had bad experience with their flight attendants on the previous trips, they were rude and not helpful.

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

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