LHR - BUE

£464 Find Cheap Flights from London Heathrow Airport to Buenos Aires – Compare and Save

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 15/9. 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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Everything you should know

Cheapest return fare
£865
Typical prices: £861-£1,055
Avianca
Thu 21/1Sun 7/2
LHR - EZE • 1 stop
Cheapest direct flights
£963
British Airways
Sat 12/12Wed 23/12
LHR - EZE • Direct
Top airlines
Cheapest • from £859 (return)
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Direct flights
Not available
There are currently no direct flights between Heathrow and Buenos Aires. You’ll need at least 1 connection.
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Top stopover airports
Cheapest • Avg £792 (return)
Shortest trip • 15h 05m (one-way)
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Top routes
Cheapest
Most popular
Insights
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When to book
in advance
Our data shows that travellers who book at least 5 weeks in advance save around 11% compared to booking last minute.
Insights
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When to travel
Cheapest • 17% price drop
Most popular
Good to know
Good to know
+1
+1
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Good to know
+1
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We hope you love your trip to Buenos Aires!
Flight Deals
Booking Insights
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, 21 Jan - Sun, 7 Feb
Multiple Airlines Logo
21:40 - 15:50
LHR
-
EZE
21h 10m
1 stop
Multiple Airlines Logo
07:30 - 08:25
EZE
-
LHR
21h 55m
2 stops
£865Multiple Airlines
Mon, 14 Sep - Wed, 30 Sep
Multiple Airlines Logo
22:05 - 15:40
LHR
-
EZE
21h 35m
1 stop
Multiple Airlines Logo
07:10 - 09:30
EZE
-
LHR
22h 20m
2 stops
£865Multiple Airlines
Wed, 9 Sep - Wed, 23 Sep
LATAM Airlines Logo
21:20 - 09:25
LHR
-
AEP
16h 05m
1 stop
LATAM Airlines Logo
18:20 - 15:05
AEP
-
LHR
16h 45m
1 stop
£872LATAM Airlines
Fri, 20 Nov - Mon, 30 Nov
Iberia Logo
19:40 - 17:25
LHR
-
EZE
24h 45m
1 stop
Iberia Logo
11:55 - 09:10
EZE
-
LHR
18h 15m
1 stop
£875Iberia
Thu, 19 Nov - Tue, 1 Dec
Avianca Logo
21:40 - 05:40
LHR
-
AEP
35h 00m
1 stop
Avianca Logo
07:00 - 14:35
AEP
-
LHR
28h 35m
1 stop
£878Avianca
Wed, 16 Sep - Wed, 23 Sep
Avianca Logo
22:05 - 05:40
LHR
-
AEP
35h 35m
1 stop
Avianca Logo
07:00 - 15:35
AEP
-
LHR
28h 35m
1 stop
£880Avianca
Wed, 9 Sep - Wed, 23 Sep
LATAM Airlines Logo
20:10 - 20:00
LHR
-
AEP
27h 50m
2 stops
LATAM Airlines Logo
18:20 - 15:05
AEP
-
LHR
16h 45m
1 stop
£882LATAM Airlines
Fri, 11 Dec - Fri, 18 Dec
British Airways Logo
22:00 - 11:45
LHR
-
EZE
16h 45m
1 stop
British Airways Logo
13:15 - 08:25
EZE
-
LHR
16h 10m
1 stop
£885British Airways
Fri, 25 Sep - Sun, 27 Sep
British Airways Logo
18:45 - 16:05
LHR
-
EZE
25h 20m
1 stop
British Airways Logo
21:40 - 17:15
EZE
-
LHR
15h 35m
1 stop
£888British Airways
Sat, 28 Nov - Sat, 12 Dec
Iberia Logo
06:15 - 21:00
LHR
-
EZE
17h 45m
1 stop
Iberia Logo
19:10 - 14:20
EZE
-
LHR
16h 10m
1 stop
£906Iberia
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 September.

Flight prices are below average for this route right now.

Flights to Buenos Aires from London Heathrow Airport usually cost between £1,041 and £1,322 in September.
The lowest price found in the past 5 days was £856 on Avianca (11 Sept–18 Sept).

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 £877 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 May, where tickets cost £842 (return) on average. On the other hand, the most expensive months are December and August, where the average cost of round-trip tickets is £1,393 and £1,140 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 5 weeks before departure, which saves you about 11% 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 season

June

Cheapest flight

£464
Best time to beat the crowds (9% less expensive on average)
Most popular time to fly (36% more expensive on average)
Flight from London Heathrow Airport to Buenos Aires Ministro Pistarini

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 5 days, the lowest price for a flight from London Heathrow Airport to Buenos Aires was £464 for a one-way ticket and £859 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, and Star Alliance are the airline alliances operating flights between London Heathrow Airport and Buenos Aires, with oneworld being the most commonly used for this route.

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

    The two airlines most popular with KAYAK users for flights from London to Buenos Aires are Air France and LATAM Airlines. With an average price for the route of £1,142 and an overall rating of 7.5, Air France is the most popular choice. LATAM Airlines is also a great choice for the route, with an average price of £1,095 and an overall rating of 7.4.

  • 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.
7.4
LATAM AirlinesOverall score based on 1965 reviews
7.3Comfort
7.5Boarding
8.0Crew
6.7Food
7.0Entertainment
Airline reviews

It was delayed for 2 hours. Then when we arrived they took us on a very uncomfortable bus and left us there. The bus driver wouldn't let us out because no one from Latam was there. Everything was disaster.

4.0 OkayNicole, Feb 2026
LIM - LAX
Read more LATAM Airlines reviews

It was delayed for 2 hours. Then when we arrived they took us on a very uncomfortable bus and left us there. The bus driver wouldn't let us out because no one from Latam was there. Everything was disaster.

We traveled with two young children, and it was not possible for our family to be seated together. No one offered help or assistance to organize seating so we could sit with our kids. In the end, we managed to find two seats in Economy so I could at least sit with one of them, even though I had originally paid for Comfort+. In summary, I had to downgrade my seat just to be able to sit with one of my children, which was very disappointing

Good flight, boarding ok and crew very nice. Flight was not full so I was able to be very comfortable. Blanket and pillow provided with was good as it was very cold during the flight . Food was very good(small snack sandwich and an excellent piece of orange cake). Overall good flight, no complaints.

Poor, the airline was not able to help me move flights.

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.

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

They didi not provide wheelchair though we had requested. We had to run around for 40 minutes and arrange it from the airport!

Flight never happened because of previous flight delay. Sent back to the stays on a flight 10 hrs later without making to my final destination and still waiting full rugindo for it. So yeah not a good experience

the flight from Boston to Curitiba was on time actually 30 minutes earlier. latam was not able to unload the luggage for custom checkup in Sao Paulo ii took two and half hours . i missed the flight to Curitiba spend the night in hotel and then flying in the morning to Curitiba

Our yoga retreat was cancelled and besides not refunding is, they would not even let us change dates or locations. As a matter of fact they wouldn’t even talk to us and kept referring to the travel agent, who said they couldn’t change anything and it was up to the airline to do so. They passed the buck until it was too late to do anything about it. Avoid Latham and Budget Air for your travel plans.

There was confusion over the electric wheelchair. Though it was categorized and double checked at checking the gate seemed confused by the chair.

Boarding was a mad rush as people still had issues with boarding passes and groups 3- 7 were asked to board when travelers were still stuck behind the document check. Food was one of the worst I’ve ever had in an Economy flight. The crew was very friendly though

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.

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.

Overall a great. However, the seating is way too narrow, for guys with any shoulder width. Luckily the crew moved the guy next to me, or it would have been miserable.

The plane was not well maintained. The entertainment system didn’t work properly, eg moving map. Many of the seat controls did not work. Cabin temperature fluctuated considerably during the flight. The seat allocated was poor, it was noisy and offered no privacy. The perfume in the toilet triggered severe allergies. Crew was very goid.

Flight map did not work. Crew was great, food was good, plane took off on time and landed early. That's all I can ask.

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.

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.

Flights scheduled with impossible connections - Lufthansa apparently believes it takes 7mins to change terminals, go through passport control, re-clear security and walk 1.8kms…..and everything will work perfectly (which it never does at Frankfurt). No staff on hand to assist with transfers on delayed flights. No transfer guidance provided by app. No compensation offered for 6hr delay to connecting flight.

Crew were friendly and very helpful Plane was clean and the legroom is standard. Overall a good flight, no complaints.

I did not like that they failed to put my luggage on my connecting flight to Athens. I was promised it would be located and delivered within 2 days but later told there was no information on its location. This caused me to have unplanned for expenses because I then had to purchase new clothing to wear on my vacation. I did not receive my luggage until my return flight home. I will not be traveling with them again.

No internet, very narrow seats insufficient room for three passengers with encroachment.

Other than problems with checking in and uploading passport info everything was great. It would be nice to be able to manually input passport info. Often while traveling the bandwidth has problems uploading pictures

Give at least coffee or juice as it is an international flight.

Tiny, cramped seats with minimum leg room and hard armrests. Basic needs like a seat and luggage came with an additional charge. Budget airline amenities with premium airlune cost. I won't use this airline again.

Not good because in this cancelled and then rebooked flight BA put me and my husband in both middle seats when we were originally seated together in original flight and i was in aisle. I hate sitting in the middle. BA food needs to be better. It was just ok. Thanks though to screw and everyone one for safe flight

Crew members were thorough in checking seatbelts and whatnot which makes me feel cared for because passenger safety is a main concern.

I was sent an email that said my card payment was not verified. When I spoke to an agent , he said my card was not verified and the flight I thought I had to booked was no longer available so I booked another flight on another airline(United). Later I got flight updates , etc., concerning my supposed first flight. So if I was charged for this flight on British Airways/American airlines, I need a refund.

The crew made it a great flight. They were friendly and attentive. They made me want to fly British Airways again.

BA has not been handling priority luggage with any special priority. This time our luggage was distinctly very slow to arrive, well after the first half of items to arrive. Business class flights cost a lot and it would be nice to have that reflected in the speed of baggage handling! (I note that this has worsened in our long experience of BA.) On a different note, we spent 2.5 hours on the plane after landing because of an airport mishap at Boston Logan. The pilot provided reasonably frequent update but more could have been done to ensure passenger comfort, such as more beverage and maybe snack services.

I purchased premier economy seats but I was seated one row off and was sitting in economy my bottle of water and cookie did not compare to the menus handed OP it in premier.

I understand and don't want food on a short trip, but tea and coffe (at least 1 cup) should be free. Nevertheless there was water available and the crew was nice.

Food is horrible. Flight was good and the staff were mostly men.

Delayed suitcase - terrible service to get my suitcase next day, I was informed it would arrive today in the afternoon (Jun/28). Now, I was informed I may or may not receive it until 3 am (Jun/29).

Seats were comfortable, but boarding was the worst I've ever seen. Way too much walking to get onboard as we had to go up & down steps several & then bus took us halfway around the airport for boarding & had to board outside after a very long bus rood.

The airline did not allow enough time for the Columbia checkpoint

The crew was great! They waited for me as Air Canada flight was delayed by 1:15 hours from Ottawa to Toronto. I am a bit disappointed that we could only use wifi for entertainment but I survived! The only thing I would of liked is a more comfortable seat. The seat cushions are not thick enough for flights longer than 3 hours. Aside from that, everything was great.

Last seat of Bussines Class it does recline but passenger seating behind kept pushing since they did not have space once my seat was reclined

My whole return flight itinerary, 3 flights, got canceled without any warning to me because I missed one of the earlier flights 3 weeks ago

They charged for WATER on a SIX hour flight!! never again!

My fly was cancelled so i run to the airport and fight for my fly Thank god at the end was good

The temperature was cold and the food that we had to pay for was awful. The crew didn’t even offer a free glass of water. It was a long, expensive and uncomfortable flight.

There was no food or drink service, couldn’t even get a glass of water for free. It was a long and expensive flight to not offer food or beverage on the plane.

My experience was amazing! They helped my elderly mother board on early through a wheelchair and were accommodating to have us sit together since our seats were in different locations. When landing at the airport in GUA they were very helpful with full of hospitality.

My international flight from LAX to Argentina had one free check in bag included in the price I paid, however your crew in LAX made me pay $95 USD to carry it on! Please note I had only on small size luggage (carry on size) and one backpack. I demand my $95 USD back that you guys charged me illegally in LAX.

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

Information on your arrival and departure airports