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Cheap flights from London Heathrow Airport to Buenos Aires from $801

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 4/9. 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 (LHR-BUE)

Cheap return flights

Avianca Logo
22:05 - 00:10LHR-EZE
30h 05m1 stop
Avianca Logo
01:40 - 15:35EZE-LHR
33h 55m1 stop
$1,398Avianca
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Mon, 8 Sep - Tue, 23 Sep
United Airlines Logo
11:05 - 08:00LHR-EZE
24h 55m2 stops
United Airlines Logo
21:00 - 05:55EZE-LHR
28h 55m2 stops
$1,605United Airlines
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Wed, 3 Sep - Mon, 29 Sep
United Airlines Logo
13:40 - 08:00LHR-EZE
22h 20m1 stop
United Airlines Logo
21:00 - 06:55EZE-LHR
29h 55m2 stops
$1,611United Airlines
Find Deal
Tue, 9 Sep - Mon, 22 Sep
Turkish Airlines Logo
22:35 - 22:25LHR-EZE
26h 50m2 stops
Turkish Airlines Logo
23:55 - 09:55EZE-LHR
31h 00m2 stops
$1,662Turkish Airlines
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Sat, 1 Nov - Sun, 23 Nov
Logo
15:30 - 06:25LHR-EZE
18h 55m1 stop
Logo
13:30 - 16:25EZE-LHR
22h 55m2 stops
$1,665
Find Deal
Fri, 12 Sep - Wed, 22 Oct
Logo
15:30 - 06:25LHR-EZE
18h 55m1 stop
Logo
13:30 - 16:25EZE-LHR
22h 55m2 stops
$1,671
Find Deal
Fri, 12 Sep - Wed, 22 Oct
Lufthansa Logo
10:30 - 06:25LHR-EZE
23h 55m1 stop
Lufthansa Logo
16:40 - 12:40EZE-LHR
16h 00m1 stop
$1,676Lufthansa
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Fri, 5 Sep - Sun, 28 Sep
Lufthansa Logo
06:30 - 06:25LHR-EZE
27h 55m1 stop
Lufthansa Logo
16:40 - 18:40EZE-LHR
22h 00m1 stop
$1,683Lufthansa
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Tue, 16 Sep - Fri, 24 Oct
SWISS Logo
06:00 - 10:45LHR-EZE
32h 45m2 stops
SWISS Logo
13:30 - 17:50EZE-LHR
24h 20m2 stops
$1,705SWISS
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Tue, 2 Sep - Wed, 1 Oct
SWISS Logo
20:05 - 10:45LHR-EZE
42h 40m2 stops
SWISS Logo
13:30 - 13:00EZE-LHR
19h 30m2 stops
$1,747SWISS
Find Deal
Mon, 8 Sep - Wed, 24 Sep

SWISS flights from London Heathrow Airport to Buenos Aires

Our best SWISS deals on London Heathrow Airport to Buenos Aires flight tickets
SWISS
2 Sept
LHR06:00London Heathrow
32h 45m
2 stops
EZE10:45Buenos Aires Ministro Pistarini
1 Oct
EZE13:30Buenos Aires Ministro Pistarini
24h 20m
2 stops
LHR17:50London Heathrow
$1,705
Find similar
SWISS
8 Sept
LHR20:05London Heathrow
42h 40m
2 stops
EZE10:45Buenos Aires Ministro Pistarini
24 Sept
EZE13:30Buenos Aires Ministro Pistarini
19h 30m
2 stops
LHR13:00London Heathrow
$1,747
Find similar
SWISS
8 Sept
LHR20:05London Heathrow
42h 40m
2 stops
EZE10:45Buenos Aires Ministro Pistarini
24 Sept
EZE13:30Buenos Aires Ministro Pistarini
22h 55m
2 stops
LHR16:25London Heathrow
$1,765
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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
3 Sept
LHR11:05London Heathrow
24h 55m
2 stops
EZE08:00Buenos Aires Ministro Pistarini
29 Sept
EZE21:00Buenos Aires Ministro Pistarini
28h 55m
2 stops
LHR05:55London Heathrow
$1,605
Find similar
United Airlines
9 Sept
LHR13:40London Heathrow
22h 20m
1 stop
EZE08:00Buenos Aires Ministro Pistarini
22 Sept
EZE21:00Buenos Aires Ministro Pistarini
29h 55m
2 stops
LHR06:55London Heathrow
$1,611
Find similar
United Airlines
8 Sept
LHR14:50London Heathrow
45h 10m
2 stops
EZE08:00Buenos Aires Ministro Pistarini
24 Sept
EZE21:00Buenos Aires Ministro Pistarini
30h 40m
1 stop
LHR07:40London Heathrow
$1,614
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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 5 August 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

Mon 8/9

22:05-00:10

1 stop30h 05m

Buenos Aires Ministro Pistarini

Tue 23/9

01:40-15:35

1 stop33h 55m

$1,398

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Wed 3/9

11:05-08:00

2 stops24h 55m

Buenos Aires Ministro Pistarini

Mon 29/9

21:00-05:55

2 stops28h 55m

$1,605

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Tue 9/9

13:40-08:00

1 stop22h 20m

Buenos Aires Ministro Pistarini

Mon 22/9

21:00-06:55

2 stops29h 55m

$1,611

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Sat 1/11

22:35-22:25

2 stops26h 50m

Buenos Aires Ministro Pistarini

Sun 23/11

23:55-09:55

2 stops31h 00m

$1,662

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Fri 12/9

15:30-06:25

1 stop18h 55m

Buenos Aires Ministro Pistarini

Wed 22/10

13:30-16:25

2 stops22h 55m

$1,665

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Fri 12/9

15:30-06:25

1 stop18h 55m

Buenos Aires Ministro Pistarini

Wed 22/10

13:30-16:25

2 stops22h 55m

$1,671

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Fri 5/9

10:30-06:25

1 stop23h 55m

Buenos Aires Ministro Pistarini

Sun 28/9

16:40-12:40

1 stop16h 00m

$1,676

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Tue 16/9

06:30-06:25

1 stop27h 55m

Buenos Aires Ministro Pistarini

Fri 24/10

16:40-18:40

1 stop22h 00m

$1,683

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Tue 2/9

06:00-10:45

2 stops32h 45m

Buenos Aires Ministro Pistarini

Wed 1/10

13:30-17:50

2 stops24h 20m

$1,705

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Mon 8/9

20:05-10:45

2 stops42h 40m

Buenos Aires Ministro Pistarini

Wed 24/9

13:30-13:00

2 stops19h 30m

$1,747

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 cheapest month to fly to Buenos Aires?

The cheapest month to fly to Buenos Aires from London Heathrow Airport is in January. Flight prices, which tend to average around $1,773, are often lower during this time because this is during the off-season. If you don’t want to visit Buenos Aires in January, then you should wait until February to fly from London Heathrow Airport, when ticket prices are also cheap, with an average price of $1,785.

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 $2,066 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 $1,873 on momondo.

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

As of August 2025, prices for London Heathrow Airport to Buenos Aires flights are approximately 8% 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

Best price found

$801

Fastest flight time

16h 05m

Direct flights

None

Airports in Buenos Aires

1 airport
The best one-way flight to Buenos Aires from London Heathrow Airport in the past 72 hours is $801. The best return flight deal from London Heathrow Airport to Buenos Aires found on momondo in the last 72 hours is $1,398.
The fastest flight from London Heathrow Airport to Buenos Aires takes 16h 05m
There are no direct flights from London Heathrow Airport to Buenos Aires. Popular non-direct route for this connection is London Heathrow Airport - Buenos Aires Ministro Pistarini Airport.
There is 1 airport near Buenos Aires: Buenos Aires Ministro Pistarini (EZE)
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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 55m 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