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Cheap flights from London Heathrow Airport to Buenos Aires from $949

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 20/3. 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.
Multiple Airlines Logo
18:40 - 10:50
LHR
-
EZE
20h 10m
2 stops
Multiple Airlines Logo
16:35 - 16:40
EZE
-
LHR
20h 05m
1 stop
$1,421Multiple Airlines
Tue, 12 May - Mon, 8 Jun
SWISS Logo
20:05 - 10:50
LHR
-
EZE
42h 45m
2 stops
SWISS Logo
13:30 - 17:50
EZE
-
LHR
24h 20m
2 stops
$1,427SWISS
Mon, 11 May - Wed, 10 Jun
Lufthansa Logo
17:30 - 06:25
LHR
-
EZE
16h 55m
1 stop
Lufthansa Logo
16:35 - 16:40
EZE
-
LHR
20h 05m
1 stop
$1,433Lufthansa
Mon, 11 May - Mon, 8 Jun
SWISS Logo
08:55 - 10:50
LHR
-
EZE
29h 55m
3 stops
SWISS Logo
13:30 - 17:50
EZE
-
LHR
24h 20m
2 stops
$1,477SWISS
Tue, 12 May - Wed, 10 Jun
SWISS Logo
07:00 - 10:50
LHR
-
EZE
31h 50m
3 stops
SWISS Logo
13:30 - 17:50
EZE
-
LHR
24h 20m
2 stops
$1,481SWISS
Tue, 12 May - Wed, 10 Jun
Avianca Logo
22:05 - 00:25
LHR
-
EZE
30h 20m
1 stop
Avianca Logo
07:10 - 15:35
EZE
-
LHR
28h 25m
1 stop
$1,487Avianca
Thu, 23 Apr - Thu, 7 May
Avianca Logo
22:05 - 15:40
LHR
-
EZE
21h 35m
1 stop
Avianca Logo
07:10 - 15:35
EZE
-
LHR
28h 25m
1 stop
$1,488Avianca
Thu, 23 Apr - Thu, 7 May
SWISS Logo
19:15 - 10:50
LHR
-
EZE
43h 35m
3 stops
SWISS Logo
13:30 - 17:50
EZE
-
LHR
24h 20m
2 stops
$1,498SWISS
Mon, 18 May - Wed, 10 Jun
Lufthansa Logo
06:30 - 06:25
LHR
-
EZE
27h 55m
1 stop
Lufthansa Logo
16:35 - 18:40
EZE
-
LHR
22h 05m
1 stop
$1,520Lufthansa
Mon, 8 Jun - Wed, 17 Jun
SWISS Logo
18:40 - 10:50
LHR
-
EZE
20h 10m
2 stops
SWISS Logo
13:30 - 16:25
EZE
-
LHR
22h 55m
2 stops
$1,521SWISS
Tue, 5 May - Wed, 20 May

Avianca flights from London Heathrow Airport to Buenos Aires

Our best Avianca deals on London Heathrow Airport to Buenos Aires flight tickets
Avianca
23 Apr
LHR22:05London Heathrow
30h 20m
1 stop
EZE00:25Buenos Aires Ministro Pistarini
7 May
EZE07:10Buenos Aires Ministro Pistarini
28h 25m
1 stop
LHR15:35London Heathrow
$1,487
Avianca
23 Apr
LHR22:05London Heathrow
21h 35m
1 stop
EZE15:40Buenos Aires Ministro Pistarini
7 May
EZE07:10Buenos Aires Ministro Pistarini
28h 25m
1 stop
LHR15:35London Heathrow
$1,488
Avianca
16 May
LHR22:05London Heathrow
21h 35m
1 stop
EZE15:40Buenos Aires Ministro Pistarini
9 June
EZE16:50Buenos Aires Ministro Pistarini
18h 45m
1 stop
LHR15:35London Heathrow
$1,538

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
19 Mar
LHR12:05London Heathrow
23h 15m
1 stop
EZE08:20Buenos Aires Ministro Pistarini
26 Apr
EZE21:00Buenos Aires Ministro Pistarini
34h 35m
1 stop
LHR11:35London Heathrow
$1,636
United Airlines
19 Mar
LHR09:10London Heathrow
26h 10m
2 stops
EZE08:20Buenos Aires Ministro Pistarini
29 Apr
EZE21:00Buenos Aires Ministro Pistarini
29h 45m
2 stops
LHR06:45London Heathrow
$1,641
United Airlines
19 Mar
LHR09:10London Heathrow
26h 10m
2 stops
EZE08:20Buenos Aires Ministro Pistarini
7 May
EZE21:00Buenos Aires Ministro Pistarini
33h 40m
2 stops
LHR10:40London Heathrow
$1,642

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 9 March 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

Tue 12/5

18:40-10:50

2 stops20h 10m

Buenos Aires Ministro Pistarini

Mon 8/6

16:35-16:40

1 stop20h 05m

$1,421

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Mon 11/5

20:05-10:50

2 stops42h 45m

Buenos Aires Ministro Pistarini

Wed 10/6

13:30-17:50

2 stops24h 20m

$1,427
Fastest return journey

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Mon 11/5

17:30-06:25

1 stop16h 55m

Buenos Aires Ministro Pistarini

Mon 8/6

16:35-16:40

1 stop20h 05m

$1,433

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Tue 12/5

08:55-10:50

3 stops29h 55m

Buenos Aires Ministro Pistarini

Wed 10/6

13:30-17:50

2 stops24h 20m

$1,477

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Tue 12/5

07:00-10:50

3 stops31h 50m

Buenos Aires Ministro Pistarini

Wed 10/6

13:30-17:50

2 stops24h 20m

$1,481

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Thu 23/4

22:05-00:25

1 stop30h 20m

Buenos Aires Ministro Pistarini

Thu 7/5

07:10-15:35

1 stop28h 25m

$1,487

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Thu 23/4

22:05-15:40

1 stop21h 35m

Buenos Aires Ministro Pistarini

Thu 7/5

07:10-15:35

1 stop28h 25m

$1,488

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Mon 18/5

19:15-10:50

3 stops43h 35m

Buenos Aires Ministro Pistarini

Wed 10/6

13:30-17:50

2 stops24h 20m

$1,498

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Mon 8/6

06:30-06:25

1 stop27h 55m

Buenos Aires Ministro Pistarini

Wed 17/6

16:35-18:40

1 stop22h 05m

$1,520

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Tue 5/5

18:40-10:50

2 stops20h 10m

Buenos Aires Ministro Pistarini

Wed 20/5

13:30-16:25

2 stops22h 55m

$1,521

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 May. Flight prices, which tend to average around $1,730, are often lower during this time because this is during the off-season. If you don’t want to visit Buenos Aires in May, then you should wait until April to fly from London Heathrow Airport, when ticket prices are also cheap, with an average price of $1,756.

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 $1,990 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 $1,678 on momondo.

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

As of March 2026, prices for London Heathrow Airport to Buenos Aires flights are approximately 19% 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

21h 35m

Direct flights

None
The fastest flight from London Heathrow Airport to Buenos Aires takes 21h 35m
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.
Search flight deals

  • 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 21h 35m 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