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Cheap flights from London Heathrow Airport to Buenos Aires from $993

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 26/11. 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

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 - 12:40
EZE
-
LHR
16h 05m
1 stop
$1,707Multiple Airlines
Tue, 8 Sep - Sun, 4 Oct
British Airways Logo
07:30 - 21:00
LHR
-
EZE
16h 30m
1 stop
British Airways Logo
13:15 - 08:25
EZE
-
LHR
16h 10m
1 stop
$1,743British Airways
Sat, 21 Nov - Fri, 18 Dec
British Airways Logo
06:15 - 21:00
LHR
-
EZE
17h 45m
1 stop
British Airways Logo
22:45 - 18:50
EZE
-
LHR
17h 05m
1 stop
$1,745British Airways
Fri, 11 Dec - Thu, 31 Dec
British Airways Logo
06:15 - 21:00
LHR
-
EZE
17h 45m
1 stop
British Airways Logo
22:45 - 18:15
EZE
-
LHR
16h 30m
1 stop
$1,746British Airways
Fri, 11 Dec - Thu, 31 Dec
British Airways Logo
22:00 - 11:45
LHR
-
EZE
16h 45m
1 stop
British Airways Logo
22:45 - 18:50
EZE
-
LHR
17h 05m
1 stop
$1,749British Airways
Fri, 11 Dec - Thu, 31 Dec
TAP AIR PORTUGAL Logo
06:00 - 12:25
LHR
-
EZE
34h 25m
3 stops
TAP AIR PORTUGAL Logo
13:15 - 15:35
EZE
-
LHR
22h 20m
2 stops
$1,752TAP AIR PORTUGAL
Thu, 17 Sep - Wed, 30 Sep
TAP AIR PORTUGAL Logo
18:45 - 16:15
LHR
-
EZE
49h 30m
3 stops
TAP AIR PORTUGAL Logo
13:15 - 22:55
EZE
-
LHR
29h 40m
2 stops
$1,755TAP AIR PORTUGAL
Wed, 9 Sep - Wed, 23 Sep
TAP AIR PORTUGAL Logo
06:00 - 01:35
LHR
-
EZE
22h 35m
2 stops
TAP AIR PORTUGAL Logo
04:15 - 11:25
EZE
-
LHR
28h 10m
2 stops
$1,756TAP AIR PORTUGAL
Fri, 6 Nov - Wed, 25 Nov
TAP AIR PORTUGAL Logo
19:50 - 16:15
LHR
-
EZE
48h 25m
3 stops
TAP AIR PORTUGAL Logo
13:15 - 22:00
EZE
-
LHR
28h 45m
2 stops
$1,757TAP AIR PORTUGAL
Wed, 16 Sep - Tue, 22 Sep
TAP AIR PORTUGAL Logo
08:00 - 12:25
LHR
-
EZE
32h 25m
2 stops
TAP AIR PORTUGAL Logo
13:15 - 22:55
EZE
-
LHR
29h 40m
2 stops
$1,759TAP AIR PORTUGAL
Tue, 8 Sep - Tue, 22 Sep

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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
8 Sept
LHR07:25London Heathrow
28h 35m
2 stops
EZE08:00Buenos Aires Ministro Pistarini
15 Sept
EZE21:00Buenos Aires Ministro Pistarini
33h 25m
2 stops
LHR10:25London Heathrow
$1,826
United Airlines
7 Sept
LHR06:55London Heathrow
29h 05m
2 stops
EZE08:00Buenos Aires Ministro Pistarini
20 Sept
EZE21:00Buenos Aires Ministro Pistarini
33h 25m
2 stops
LHR10:25London Heathrow
$1,833
United Airlines
6 Sept
LHR10:25London Heathrow
25h 35m
2 stops
EZE08:00Buenos Aires Ministro Pistarini
4 Oct
EZE21:00Buenos Aires Ministro Pistarini
28h 55m
2 stops
LHR05:55London Heathrow
$1,845

TAP AIR PORTUGAL flights from London Heathrow Airport to Buenos Aires

Our best TAP AIR PORTUGAL deals on London Heathrow Airport to Buenos Aires flight tickets
TAP AIR PORTUGAL
17 Sept
LHR06:00London Heathrow
34h 25m
3 stops
EZE12:25Buenos Aires Ministro Pistarini
30 Sept
EZE13:15Buenos Aires Ministro Pistarini
22h 20m
2 stops
LHR15:35London Heathrow
$1,752
TAP AIR PORTUGAL
9 Sept
LHR18:45London Heathrow
49h 30m
3 stops
EZE16:15Buenos Aires Ministro Pistarini
23 Sept
EZE13:15Buenos Aires Ministro Pistarini
29h 40m
2 stops
LHR22:55London Heathrow
$1,755
TAP AIR PORTUGAL
6 Nov
LHR06:00London Heathrow
22h 35m
2 stops
EZE01:35Buenos Aires Ministro Pistarini
25 Nov
EZE04:15Buenos Aires Ministro Pistarini
28h 10m
2 stops
LHR11:25London 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 27 July 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 8/9

18:40-10:50

2 stops20h 10m

Buenos Aires Ministro Pistarini

Sun 4/10

16:35-12:40

1 stop16h 05m

$1,707
Fastest return journey

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Sat 21/11

07:30-21:00

1 stop16h 30m

Buenos Aires Ministro Pistarini

Fri 18/12

13:15-08:25

1 stop16h 10m

$1,743

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Fri 11/12

06:15-21:00

1 stop17h 45m

Buenos Aires Ministro Pistarini

Thu 31/12

22:45-18:50

1 stop17h 05m

$1,744

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Fri 11/12

06:15-21:00

1 stop17h 45m

Buenos Aires Ministro Pistarini

Thu 31/12

22:45-18:15

1 stop16h 30m

$1,746

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Fri 11/12

22:00-11:45

1 stop16h 45m

Buenos Aires Ministro Pistarini

Thu 31/12

22:45-18:50

1 stop17h 05m

$1,749

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Thu 17/9

06:00-12:25

3 stops34h 25m

Buenos Aires Ministro Pistarini

Wed 30/9

13:15-15:35

2 stops22h 20m

$1,752

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Wed 9/9

18:45-16:15

3 stops49h 30m

Buenos Aires Ministro Pistarini

Wed 23/9

13:15-22:55

2 stops29h 40m

$1,755

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Fri 6/11

06:00-01:35

2 stops22h 35m

Buenos Aires Ministro Pistarini

Wed 25/11

04:15-11:25

2 stops28h 10m

$1,756

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Wed 16/9

19:50-16:15

3 stops48h 25m

Buenos Aires Ministro Pistarini

Tue 22/9

13:15-22:00

2 stops28h 45m

$1,757

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Tue 8/9

08:00-12:25

2 stops32h 25m

Buenos Aires Ministro Pistarini

Tue 22/9

13:15-22:55

2 stops29h 40m

$1,759

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?

Prices are currently low for flights on this route.

Typical prices usually range from $1,986 to $2,523.
The lowest price recently found on this route was $1,707.

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 $1,606, 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 October to fly from London Heathrow Airport, when ticket prices are also cheap, with an average price of $1,782.

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 $1,974 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 $1,538 on momondo.

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

As of July 2026, prices for London Heathrow Airport to Buenos Aires flights are approximately 16% 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

19h 45m

Direct flights

Fri

Airports in Buenos Aires

2 airports
The fastest flight from London Heathrow Airport to Buenos Aires takes 19h 45m
Direct flights go from London Heathrow Airport to Buenos Aires on Friday. 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 19h 45m 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