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Cheap flights from London Heathrow Airport to Buenos Aires from $921

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 1/4. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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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.
Avianca Logo
21:40 - 00:35LHR-EZE
29h 55m1 stop
Avianca Logo
16:45 - 15:35EZE-LHR
18h 50m1 stop
$1,675Avianca
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Di, 17 Mrz - Di, 14 Apr
United Airlines Logo
10:00 - 09:20LHR-EZE
26h 20m1 stop
United Airlines Logo
23:55 - 07:30EZE-LHR
28h 35m1 stop
$1,693United Airlines
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So, 15 Feb - Fr, 27 Feb
United Airlines Logo
14:45 - 07:20LHR-EZE
43h 35m1 stop
United Airlines Logo
23:55 - 07:30EZE-LHR
28h 35m1 stop
$1,695United Airlines
Find Deal
Mi, 4 Feb - Mo, 23 Feb
United Airlines Logo
12:05 - 07:20LHR-EZE
22h 15m1 stop
United Airlines Logo
22:05 - 07:30EZE-LHR
30h 25m1 stop
$1,701United Airlines
Find Deal
Do, 5 Feb - Sa, 21 Feb
SWISS Logo
20:05 - 11:50LHR-EZE
42h 45m2 stops
SWISS Logo
14:40 - 13:00EZE-LHR
19h 20m2 stops
$1,710SWISS
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Mo, 23 Feb - Mi, 4 Mrz
British Airways Logo
19:40 - 17:55LHR-EZE
25h 15m1 stop
British Airways Logo
22:45 - 18:15EZE-LHR
16h 30m1 stop
$1,733British Airways
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Di, 10 Feb - Di, 17 Feb
Turkish Airlines Logo
22:35 - 22:25LHR-EZE
50h 50m2 stops
Turkish Airlines Logo
23:55 - 14:55EZE-LHR
36h 00m2 stops
$1,738Turkish Airlines
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Do, 12 Mrz - Mo, 16 Mrz
SWISS Logo
20:05 - 11:50LHR-EZE
42h 45m2 stops
SWISS Logo
14:40 - 18:40EZE-LHR
25h 00m3 stops
$1,762SWISS
Find Deal
Mo, 23 Feb - Mi, 4 Mrz
Turkish Airlines Logo
22:35 - 22:25LHR-EZE
26h 50m2 stops
Turkish Airlines Logo
23:55 - 15:20EZE-LHR
35h 25m2 stops
$1,764Turkish Airlines
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So, 15 Mrz - So, 29 Mrz
SWISS Logo
20:05 - 11:50LHR-EZE
42h 45m2 stops
SWISS Logo
14:40 - 16:20EZE-LHR
22h 40m2 stops
$1,765SWISS
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Mo, 2 Mrz - Sa, 7 Mrz

United Airlines flights from London Heathrow Airport to Buenos Aires

Our best United Airlines deals on London Heathrow Airport to Buenos Aires flight tickets
United Airlines
15 Feb
LHR12:05London Heathrow
24h 15m
1 stop
EZE09:20Buenos Aires Ministro Pistarini
25 Feb
EZE22:05Buenos Aires Ministro Pistarini
28h 50m
2 stops
LHR05:55London Heathrow
$1,693
Find similar
United Airlines
4 Feb
LHR14:45London Heathrow
43h 35m
1 stop
EZE07:20Buenos Aires Ministro Pistarini
23 Feb
EZE23:55Buenos Aires Ministro Pistarini
28h 35m
1 stop
LHR07:30London Heathrow
$1,695
Find similar
United Airlines
5 Feb
LHR12:05London Heathrow
22h 15m
1 stop
EZE07:20Buenos Aires Ministro Pistarini
21 Feb
EZE22:05Buenos Aires Ministro Pistarini
30h 25m
1 stop
LHR07:30London Heathrow
$1,701
Find similar

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
10 Feb
LHR19:40London Heathrow
25h 15m
1 stop
EZE17:55Buenos Aires Ministro Pistarini
17 Feb
EZE22:45Buenos Aires Ministro Pistarini
16h 30m
1 stop
LHR18:15London Heathrow
$1,733
Find similar
British Airways
31 Dec
LHR17:25London Heathrow
18h 15m
1 stop
EZE08:40Buenos Aires Ministro Pistarini
17 Apr
EZE13:00Buenos Aires Ministro Pistarini
23h 20m
1 stop
LHR16:20London Heathrow
$1,834
Find similar
British Airways
12 Feb
LHR19:05London Heathrow
25h 20m
1 stop
EZE17:25Buenos Aires Ministro Pistarini
17 Feb
EZE22:45Buenos Aires Ministro Pistarini
15h 30m
1 stop
LHR17:15London Heathrow
$1,854
Find similar

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 2 Dezember 2025.
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

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Di 17/3

21:40-00:35

1 stop29h 55m

Buenos Aires Ministro Pistarini

Di 14/4

16:45-15:35

1 stop18h 50m

$1,675

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

So 15/2

10:00-09:20

1 stop26h 20m

Buenos Aires Ministro Pistarini

Fr 27/2

23:55-07:30

1 stop28h 35m

$1,693

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Mi 4/2

14:45-07:20

1 stop43h 35m

Buenos Aires Ministro Pistarini

Mo 23/2

23:55-07:30

1 stop28h 35m

$1,695

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Do 5/2

12:05-07:20

1 stop22h 15m

Buenos Aires Ministro Pistarini

Sa 21/2

22:05-07:30

1 stop30h 25m

$1,701

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Mo 23/2

20:05-11:50

2 stops42h 45m

Buenos Aires Ministro Pistarini

Mi 4/3

14:40-13:00

2 stops19h 20m

$1,710

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Di 10/2

19:40-17:55

1 stop25h 15m

Buenos Aires Ministro Pistarini

Di 17/2

22:45-18:15

1 stop16h 30m

$1,733

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Do 12/3

22:35-22:25

2 stops50h 50m

Buenos Aires Ministro Pistarini

Mo 16/3

23:55-14:55

2 stops36h 00m

$1,738

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Mo 23/2

20:05-11:50

2 stops42h 45m

Buenos Aires Ministro Pistarini

Mi 4/3

14:40-18:40

3 stops25h 00m

$1,762

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

So 15/3

22:35-22:25

2 stops26h 50m

Buenos Aires Ministro Pistarini

So 29/3

23:55-15:20

2 stops35h 25m

$1,764

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Mo 2/3

20:05-11:50

2 stops42h 45m

Buenos Aires Ministro Pistarini

Sa 7/3

14:40-16:20

2 stops22h 40m

$1,765

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 February. Flight prices, which tend to average around $1,796, are often lower during this time because this is during the off-season. If you don’t want to visit Buenos Aires in February, then you should wait until March to fly from London Heathrow Airport, when ticket prices are also cheap, with an average price of $1,816.

How far in advance should I book a flight 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 $2,094 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 $1,765 on momondo.

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

As of December 2025, prices for London Heathrow Airport to Buenos Aires flights are approximately 16% more expensive 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

23h 55m

Direct flights

None
The fastest flight from London Heathrow Airport to Buenos Aires takes 23h 55m
There are no direct flights from London Heathrow Airport to Buenos Aires. There are no popular flight routes from London Heathrow Airport to Buenos Aires.
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  • 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 16h 25m 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