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Cheap flights from London Heathrow Airport to Buenos Aires from $820

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London Heathrow Airport to Buenos Aires departing on 23/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Find the cheapest flights from London Heathrow Airport to Buenos Aires

Cheap return flights

Enter your travel dates to find the best prices.
British Airways Logo
20:00 - 16:05
LHR
-
EZE
24h 05m
1 stop
British Airways Logo
12:25 - 08:10
EZE
-
LHR
15h 45m
1 stop
$1,639British Airways
Wed, 1 Jul - Wed, 29 Jul
British Airways Logo
20:00 - 16:05
LHR
-
EZE
24h 05m
1 stop
British Airways Logo
12:25 - 08:10
EZE
-
LHR
15h 45m
1 stop
$1,643British Airways
Wed, 1 Jul - Wed, 29 Jul
British Airways Logo
20:00 - 16:05
LHR
-
EZE
24h 05m
1 stop
British Airways Logo
12:25 - 08:10
EZE
-
LHR
15h 45m
1 stop
$1,652British Airways
Wed, 1 Jul - Wed, 29 Jul
LEVEL Logo
09:55 - 17:55
LHR
-
EZE
35h 00m
1 stop
LEVEL Logo
19:45 - 20:05
EZE
-
LHR
21h 20m
1 stop
$1,664LEVEL
Fri, 20 Nov - Sun, 29 Nov
British Airways Logo
21:45 - 10:45
LHR
-
EZE
17h 00m
1 stop
British Airways Logo
12:25 - 08:10
EZE
-
LHR
15h 45m
1 stop
$1,681British Airways
Mon, 5 Oct - Wed, 14 Oct
British Airways Logo
20:00 - 16:05
LHR
-
EZE
24h 05m
1 stop
British Airways Logo
12:25 - 08:10
EZE
-
LHR
15h 45m
1 stop
$1,684British Airways
Wed, 1 Jul - Wed, 29 Jul
British Airways Logo
20:00 - 16:05
LHR
-
EZE
24h 05m
1 stop
British Airways Logo
12:25 - 08:10
EZE
-
LHR
15h 45m
1 stop
$1,685British Airways
Wed, 1 Jul - Wed, 29 Jul
British Airways Logo
20:00 - 16:05
LHR
-
EZE
24h 05m
1 stop
British Airways Logo
12:25 - 08:10
EZE
-
LHR
15h 45m
1 stop
$1,694British Airways
Wed, 1 Jul - Wed, 29 Jul
British Airways Logo
20:00 - 16:05
LHR
-
EZE
24h 05m
1 stop
British Airways Logo
13:00 - 08:25
EZE
-
LHR
15h 25m
1 stop
$1,699British Airways
Wed, 1 Jul - Wed, 22 Jul
British Airways Logo
20:00 - 16:05
LHR
-
EZE
24h 05m
1 stop
British Airways Logo
13:00 - 08:25
EZE
-
LHR
15h 25m
1 stop
$1,704British Airways
Wed, 1 Jul - Wed, 22 Jul

British Airways flights from London Heathrow Airport to Buenos Aires

Our best British Airways deals on London Heathrow Airport to Buenos Aires flight tickets
British Airways
1 July
LHR20:00London Heathrow
24h 05m
1 stop
EZE16:05Buenos Aires Ministro Pistarini
29 July
EZE12:25Buenos Aires Ministro Pistarini
15h 45m
1 stop
LHR08:10London Heathrow
$1,639
British Airways
1 July
LHR20:00London Heathrow
24h 05m
1 stop
EZE16:05Buenos Aires Ministro Pistarini
29 July
EZE12:25Buenos Aires Ministro Pistarini
15h 45m
1 stop
LHR08:10London Heathrow
$1,643
British Airways
1 July
LHR20:00London Heathrow
24h 05m
1 stop
EZE16:05Buenos Aires Ministro Pistarini
29 July
EZE12:25Buenos Aires Ministro Pistarini
15h 45m
1 stop
LHR08:10London Heathrow
$1,652

KLM flights from London Heathrow Airport to Buenos Aires

Our best KLM deals on London Heathrow Airport to Buenos Aires flight tickets
KLM
8 June
LHR14:45London Heathrow
19h 05m
1 stop
EZE05:50Buenos Aires Ministro Pistarini
15 June
EZE15:05Buenos Aires Ministro Pistarini
24h 20m
1 stop
LHR19:25London Heathrow
$1,709
KLM
7 June
LHR06:30London Heathrow
19h 20m
2 stops
EZE21:50Buenos Aires Ministro Pistarini
17 June
EZE15:05Buenos Aires Ministro Pistarini
22h 30m
1 stop
LHR17:35London Heathrow
$1,754
KLM
7 June
LHR06:30London Heathrow
19h 20m
2 stops
EZE21:50Buenos Aires Ministro Pistarini
23 June
EZE15:05Buenos Aires Ministro Pistarini
15h 40m
1 stop
LHR10:45London Heathrow
$1,756

momondo Fare Finder

 
Customise your flight search to find flights from London Heathrow Airport to Buenos Aires that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 78,305 searches. Data last updated 6 June 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Buenos Aires that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Wed 1/7

20:00-16:05

1 stop24h 05m

Buenos Aires Ministro Pistarini

Wed 29/7

12:25-08:10

1 stop15h 45m

$1,639

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Wed 1/7

20:00-16:05

1 stop24h 05m

Buenos Aires Ministro Pistarini

Wed 29/7

12:25-08:10

1 stop15h 45m

$1,643

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Wed 1/7

20:00-16:05

1 stop24h 05m

Buenos Aires Ministro Pistarini

Wed 29/7

12:25-08:10

1 stop15h 45m

$1,652

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Fri 20/11

09:55-17:55

1 stop35h 00m

Buenos Aires Ministro Pistarini

Sun 29/11

19:45-20:05

1 stop21h 20m

$1,664
Fastest return journey

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Mon 5/10

21:45-10:45

1 stop17h 00m

Buenos Aires Ministro Pistarini

Wed 14/10

12:25-08:10

1 stop15h 45m

$1,681

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Wed 1/7

20:00-16:05

1 stop24h 05m

Buenos Aires Ministro Pistarini

Wed 29/7

12:25-08:10

1 stop15h 45m

$1,684

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Wed 1/7

20:00-16:05

1 stop24h 05m

Buenos Aires Ministro Pistarini

Wed 29/7

12:25-08:10

1 stop15h 45m

$1,685

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Wed 1/7

20:00-16:05

1 stop24h 05m

Buenos Aires Ministro Pistarini

Wed 29/7

12:25-08:10

1 stop15h 45m

$1,694

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Wed 1/7

20:00-16:05

1 stop24h 05m

Buenos Aires Ministro Pistarini

Wed 22/7

13:00-08:25

1 stop15h 25m

$1,699

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Wed 1/7

20:00-16:05

1 stop24h 05m

Buenos Aires Ministro Pistarini

Wed 22/7

13:00-08:25

1 stop15h 25m

$1,704

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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2

See travel insights to Buenos Aires from

How to get the cheapest flight ticket from London Heathrow Airport to Buenos Aires

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between London Heathrow Airport and Buenos Aires?

What is the cheapest month to fly to Buenos Aires?

The cheapest month to fly to Buenos Aires from London Heathrow Airport is in March. Flight prices, which tend to average around $326, are often lower during this time because this is during the off-season. If you don’t want to visit Buenos Aires in March, then you should wait until April to fly from London Heathrow Airport, when ticket prices are also cheap, with an average price of $740.

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

You are more likely to see cheaper flights to Buenos Aires from London Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Buenos Aires for around $1,960 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Buenos Aires from London Heathrow Airport for as low as $1,573 on momondo.

How have London Heathrow Airport to Buenos Aires flight prices changed over time?

As of June 2026, prices for London Heathrow Airport to Buenos Aires flights are approximately 27% cheaper when compared to flights at the same time last year.

When to book flights from London Heathrow Airport to Buenos Aires

Are you open to changing your travel dates? Check out the ideal times to fly from London Heathrow Airport to Buenos Aires according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap London Heathrow Airport to Buenos Aires (LHR to BUE) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London Heathrow Airport to Buenos Aires

Fastest flight time

17h 00m

Direct flights

Mon and Thu

Airports in Buenos Aires

2 airports
The fastest flight from London Heathrow Airport to Buenos Aires takes 17h 00m
Direct flights go from London Heathrow Airport to Buenos Aires on Monday and Thursday. There are no airlines offering direct flights..
There are 2 airports in Buenos Aires. From London Heathrow Airport there are direct flights to Buenos Aires Ministro Pistarini (EZE).
Search flight deals

Frequently asked questions about flying from London Heathrow Airport to Buenos Aires

  • How far is London Heathrow to Buenos Aires by plane?

    London Heathrow and Buenos Aires are 11101.7 km apart from one another. Typically, this will take 17h 00m by plane in normal conditions.

  • When did momondo last update prices for flights from London Heathrow Airport to Buenos Aires?

    Prices for flights from London Heathrow Airport to Buenos Aires are updated daily.

  • How old do you have to be to fly from London Heathrow Airport to Buenos Aires?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and stopovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from London Heathrow Airport to Buenos Aires.

  • What documentation or ID do you need to fly to Buenos Aires?

    The travel and health documents required for your trip to Buenos Aires can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s licence, and a passport valid for six-months after you plan to arrive at Buenos Aires. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from London Heathrow Airport to Buenos Aires?

Why use momondo?

Why should I use momondo to find a flight deal from London to Buenos Aires?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from London to Buenos Aires for you.

Can I find flights from London to Buenos Aires with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Buenos Aires from London with this policy.

How can momondo help me find flights from London to Buenos Aires?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from London to Buenos Aires.

I’m not ready to book a flight from London to Buenos Aires right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of London to Buenos Aires flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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Find better results for your trip to Argentina

Fly into one of these airports located in Buenos Aires

Airports listed have a maximum distance of 27.4 km from Buenos Aires
Buenos Aires Jorge Newbery Airport
Buenos Aires Ministro Pistarini Airport