LHR - BUE

£448 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 3/3. 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

 
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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Everything you should know

Cheapest return fare
£810
Typical prices: £840-£1,171
SWISS
Mon 9/3Wed 18/3
LHR - EZE • 2 stops
Cheapest direct flights
£909
British Airways
Mon 11/5Tue 26/5
LHR - EZE • Direct
Top airlines
SWISS
Cheapest • from £810 (return)
LATAM Airlines
Best reviews • 7.5 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 travel
February
Cheapest • 10% price drop
December
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches hundreds of sites at once to find you the best travel deals.
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

Mon, 9 Mar - Wed, 18 Mar
SWISS Logo
20:05 - 11:50
LHR
-
EZE
42h 45m
2 stops
SWISS Logo
14:40 - 21:25
EZE
-
LHR
27h 45m
3 stops
£810SWISS
Tue, 10 Mar - Tue, 24 Mar
Turkish Airlines Logo
11:30 - 22:25
LHR
-
EZE
37h 55m
2 stops
Turkish Airlines Logo
23:55 - 14:10
EZE
-
LHR
35h 15m
2 stops
£812Turkish Airlines
Wed, 13 May - Thu, 28 May
Air Canada Logo
14:05 - 14:30
LHR
-
EZE
28h 25m
2 stops
Air Canada Logo
16:35 - 06:30
EZE
-
LHR
33h 55m
2 stops
£813Air Canada
Sat, 7 Mar - Tue, 24 Mar
Turkish Airlines Logo
16:40 - 22:25
LHR
-
EZE
32h 45m
2 stops
Turkish Airlines Logo
23:55 - 14:55
EZE
-
LHR
36h 00m
2 stops
£813Turkish Airlines
Wed, 18 Mar - Wed, 25 Mar
Air Canada Logo
13:25 - 15:10
LHR
-
EZE
52h 45m
3 stops
Air Canada Logo
16:45 - 07:10
EZE
-
LHR
35h 25m
3 stops
£814Air Canada
Thu, 14 May - Thu, 28 May
Avianca Logo
22:05 - 05:40
LHR
-
AEP
35h 35m
1 stop
Avianca Logo
07:00 - 15:35
AEP
-
LHR
28h 35m
1 stop
£815Avianca
Sun, 10 May - Sat, 23 May
Avianca Logo
22:05 - 00:10
LHR
-
EZE
30h 05m
1 stop
Avianca Logo
16:45 - 15:35
EZE
-
LHR
18h 50m
1 stop
£815Avianca
Mon, 9 Mar - Wed, 18 Mar
Multiple Airlines Logo
21:15 - 14:00
LHR
-
AEP
19h 45m
1 stop
Multiple Airlines Logo
22:55 - 06:45
AEP
-
LHR
28h 50m
1 stop
£821Multiple Airlines
Fri, 6 Mar - Sun, 22 Mar
LATAM Airlines Logo
20:15 - 09:40
LHR
-
AEP
16h 25m
1 stop
LATAM Airlines Logo
18:20 - 14:05
AEP
-
LHR
16h 45m
1 stop
£839LATAM Airlines
Thu, 12 Mar - Sun, 22 Mar
LATAM Airlines Logo
20:15 - 09:40
LHR
-
AEP
16h 25m
1 stop
LATAM Airlines Logo
18:20 - 14:05
AEP
-
LHR
16h 45m
1 stop
£849LATAM Airlines
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 March.

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 £883 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 February, where tickets cost £882 (return) on average. On the other hand, the most expensive months are December and August, where the average cost of round-trip tickets is £1,349 and £1,095 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 1 week before departure. 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 seasonMay
Cheapest flight£448
Best time to beat the crowds (10% less expensive on average)
Most popular time to fly (38% 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 £448 for a one-way ticket and £810 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 £852 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 £983 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.
7.5
LATAM AirlinesOverall score based on 1915 reviews
7.3Comfort
7.0Entertainment
8.0Crew
7.5Boarding
6.7Food
Airline reviews

Latam wouldn’t tell me how much checked luggage would until I was at the airport and they charged me the highest price possible. Besides that, it was okay.

10.0 ExcellentSarah, Jan 2026
ANF - SCL
Read more LATAM Airlines reviews

Latam wouldn’t tell me how much checked luggage would until I was at the airport and they charged me the highest price possible. Besides that, it was okay.

There was a mechanical issue with the plane that they had to work on before we could take off. That's fine, by all means, PLEASE make sure the mechanics are functioning properly. What was a problem was the fact that we sat on the tarmac for 4.5 hours without moving, without letting us off the plane, and without climate control and air running through the plane. There was no explanation as to what was going on; they just kept promising that it would be "15 minutes, then we are on our way." At one point, they even switched the entire crew out and told everyone we just needed to wait for new employees to show up. Then, as the 4 hours were not moving, an hour before the full refund, they made a big show about "the flight starting and the doors are locked, so you have to sit down." We didn't move for another 40 minutes; they were just trying to skirt around legalities that entitled us to restitution. When the flight finally was underway, the plane was gigantic but cramped in design, my entertainment screen kept freezing and glitching, and subtitles didn't work, and the crew was passive-aggressive. Terrible flight.

Comfort in exit seat was excellent. FLight crew and flight were excellent. However exit seat tray table was broken so could not use it. Entertainment monitor did not work at all despite attempts to reset it.

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.

I like this airline a lot no problems at all, except being forced to check a carry-on bag ., Overall very good airline

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

Latam may be the worst airline in the world, far worse than even the lowest of low cost airlines in the USA. I wasted hours trying to PAY THEM TO CHECK A BAG! Then they misled me at the terminal, sent me through the wrong security line, the list goes on and on... Just absolutely terrible in every way. Avoid at all costs.

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

Check in -- in business took over 30 mins as there was only one attendant. Boarding was also a mess. The seat was too narrow and was not working properly. Food was very bad and the entertainment very poor. Crew was very polite and helpful, in fairness.

My flight being automatically moved messed up my travel plans, and I had to quickly find an alternative mode of transportation. I couldn’t get a refund from any of the companies involved. Kayak, Ibiza, or Vueling. I am still unsure of how to settle my concern.

It wasn’t great because the third-party from Kayak there was just no information about how to check in with Vueling. And the purchase of the ticket from under pricer just made everything really difficult. I’m unlikely to use Kayak again for these reasons.

It was fine, older plane with limited entertainment, otherwise fine.

Plane delayed due to weather. Plane boarded, then told to unboard due to a maintenance issue.

The crew was amazing. I appreciate the level of professionalism in the Iberia crew.

why can't planes be boarded from back to front?? everything was great otherwise

Terrible customer service. I booked business class and the counter agent didn’t bother asking me about any choice or preferred seat, basically assigned me that last seat and couldn’t even answer if it was a business class seat. Also iberia lost my suitcase on my flight from JFK to MAD with the layover in BCN. Useless customer service at the counter. Thank goodness I happened to check the baggage claim area of the next flight in…there it was.

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

Lufthansa flight LH04414 from Munich to Washington DC, was fine. Efficient and safe!

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.

Be aware that your carry on is no longer a carryon. They go by the weight not just the size. Because we were forced to check them we missed our connection. Waiting over half hour at the luggage carrosol. Also, this added inconvenience happened because they "kayak" changed our itinerary knowing our connection was almost impossible, they wouldn't make different flights. Will never book the flight through KAYAK. USE the carrier for direct.

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!

Both flights were delayed over 1 hour. And I had to pay for seats, even though my reservation supposedly included free seat selection.

Hate their old flights, boatding, food and services. Very poor quality

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

Best flight attendants ever! Very customer and service oriented, courteous, professional and helpful.

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

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.

I was unable to board this flight because of visa changes that I was not alerted about and I’ve been unable to contact Kayak to obtain a refund / credit anything.

My touch screen at my seat wasn't working, the films BA advertised on the website for this flight were not available, and the plane was a little dated, food was good and the staff were good, just let down by the aircraft facilities.

Did not like the seating configuration at all with 2+3+2 in business class. Lacking total privacy and comfort

Check-in experience, for business call please provide a premium experience

Lost my luggage, ran out of food choices in business class, ground crew was completely unapologetic.

Excellent. The crew and flight were great. Checking in was easy and everyone was very helpful.

Late. And service was very slow - passengers sat for well over an hour with dirty trays etc surrounding them

Entertainment devices on A380 need to be fixed, the seats might do with updates.

I like everything about British Airways. Excellence. Perfect. Exquisite service.

The plane was dirty the food was awful and the boarding process took too long

Provide free food and drinks on an international flight. Add updated head rests

We found the chairs to be really uncomfortable. It’s also really unacceptable that no form of food or drink is included in a 6+ hour flight

Deplaning was a mess, I sat in business (seats are horrible) and the front door had a problem so we had to deplane from the rear exit. The stairs were not tall enough to reach so there was a large step down from the plane to the top of the stairs.

Here we have another airline flying to Guatemala but doesn't have a plus or a less, just in the middle. Why? Well, first we don't have even free water Movie selection is poor Seats don't recline in some places Food selection is carb based Forgot to mention, customer service on the web is the worst. Good things; Very reliable on schedule Kind crew

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

We waited for one hour to deboard the plane after landing. That could be better

I handed in my suitcase in perfect condition at SAL Airport. And in MIA Airport I received it with one corner broken and the wheels bent.

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

Usb plugs for charging your phone does not work in every flight. uncomfortable chairs even in higher categories.

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

Information on your arrival and departure airports