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Cheap flights from London Heathrow Airport to Buenos Aires from £531

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 31/12. 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

Avianca Logo
21:40 - 05:50LHR-EZE
35h 10m1 stop
Avianca Logo
01:40 - 14:35EZE-LHR
33h 55m1 stop
£704Avianca
Find Deal
Wed, 12 Nov - Sun, 23 Nov
Avianca Logo
21:40 - 15:50LHR-EZE
21h 10m1 stop
Avianca Logo
07:35 - 14:35EZE-LHR
28h 00m1 stop
£721Avianca
Find Deal
Mon, 10 Nov - Fri, 28 Nov
Avianca Logo
22:05 - 00:10LHR-EZE
30h 05m1 stop
Avianca Logo
16:45 - 15:35EZE-LHR
18h 50m1 stop
£722Avianca
Find Deal
Wed, 24 Sep - Thu, 23 Oct
Lufthansa Logo
14:50 - 06:20LHR-EZE
43h 30m2 stops
Lufthansa Logo
22:05 - 10:15EZE-LHR
33h 10m1 stop
£754Lufthansa
Find Deal
Sat, 25 Oct - Sun, 9 Nov
United Airlines Logo
16:40 - 08:20LHR-EZE
43h 40m2 stops
United Airlines Logo
23:55 - 07:30EZE-LHR
28h 35m1 stop
£783United Airlines
Find Deal
Sat, 25 Oct - Sun, 23 Nov
United Airlines Logo
16:40 - 06:20LHR-EZE
41h 40m2 stops
United Airlines Logo
23:55 - 07:30EZE-LHR
28h 35m1 stop
£784United Airlines
Find Deal
Sat, 25 Oct - Tue, 11 Nov
British Airways Logo
06:10 - 20:05LHR-EZE
17h 55m1 stop
British Airways Logo
13:00 - 10:15EZE-LHR
17h 15m1 stop
£824British Airways
Find Deal
Tue, 14 Oct - Sat, 25 Oct
Lufthansa Logo
13:35 - 07:20LHR-EZE
44h 45m2 stops
Lufthansa Logo
23:55 - 10:15EZE-LHR
31h 20m1 stop
£828Lufthansa
Find Deal
Sat, 1 Nov - Mon, 17 Nov
LATAM Airlines Logo
18:45 - 14:40LHR-AEP
22h 55m2 stops
LATAM Airlines Logo
12:40 - 14:05AEP-LHR
22h 25m1 stop
£843LATAM Airlines
Find Deal
Tue, 10 Mar - Tue, 24 Mar
LATAM Airlines Logo
19:05 - 16:00LHR-AEP
23h 55m2 stops
LATAM Airlines Logo
14:55 - 14:05AEP-LHR
20h 10m1 stop
£874LATAM Airlines
Find Deal
Wed, 25 Feb - Mon, 9 Mar

Avianca flights from London Heathrow Airport to Buenos Aires

Our best Avianca deals on London Heathrow Airport to Buenos Aires flight tickets
Avianca
12 Nov
LHR21:40London Heathrow
35h 10m
1 stop
EZE05:50Buenos Aires Ministro Pistarini
23 Nov
EZE01:40Buenos Aires Ministro Pistarini
33h 55m
1 stop
LHR14:35London Heathrow
£704
Find similar
Avianca
10 Nov
LHR21:40London Heathrow
21h 10m
1 stop
EZE15:50Buenos Aires Ministro Pistarini
28 Nov
EZE07:35Buenos Aires Ministro Pistarini
28h 00m
1 stop
LHR14:35London Heathrow
£721
Find similar
Avianca
24 Sept
LHR22:05London Heathrow
30h 05m
1 stop
EZE00:10Buenos Aires Ministro Pistarini
23 Oct
EZE16:45Buenos Aires Ministro Pistarini
18h 50m
1 stop
LHR15:35London Heathrow
£722
Find similar

LATAM Airlines flights from London Heathrow Airport to Buenos Aires

Our best LATAM Airlines deals on London Heathrow Airport to Buenos Aires flight tickets
LATAM Airlines
10 Mar
LHR18:45London Heathrow
22h 55m
2 stops
AEP14:40Buenos Aires Jorge Newbery
24 Mar
AEP12:40Buenos Aires Jorge Newbery
22h 25m
1 stop
LHR14:05London Heathrow
£843
Find similar
LATAM Airlines
25 Feb
LHR19:05London Heathrow
23h 55m
2 stops
AEP16:00Buenos Aires Jorge Newbery
9 Mar
AEP14:55Buenos Aires Jorge Newbery
20h 10m
1 stop
LHR14:05London Heathrow
£874
Find similar
LATAM Airlines
9 Mar
LHR15:45London Heathrow
20h 55m
2 stops
AEP09:40Buenos Aires Jorge Newbery
15 Mar
AEP18:20Buenos Aires Jorge Newbery
16h 45m
1 stop
LHR14:05London Heathrow
£876
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 279,928 searches. Data last updated 12 September 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

Wed 12/11

21:40-05:50

1 stop35h 10m

Buenos Aires Ministro Pistarini

Sun 23/11

01:40-14:35

1 stop33h 55m

£704

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Mon 10/11

21:40-15:50

1 stop21h 10m

Buenos Aires Ministro Pistarini

Fri 28/11

07:35-14:35

1 stop28h 00m

£721

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Wed 24/9

22:05-00:10

1 stop30h 05m

Buenos Aires Ministro Pistarini

Thu 23/10

16:45-15:35

1 stop18h 50m

£722

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Sat 25/10

14:50-06:20

2 stops43h 30m

Buenos Aires Ministro Pistarini

Sun 9/11

22:05-10:15

1 stop33h 10m

£754

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Sat 25/10

16:40-08:20

2 stops43h 40m

Buenos Aires Ministro Pistarini

Sun 23/11

23:55-07:30

1 stop28h 35m

£783

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Sat 25/10

16:40-06:20

2 stops41h 40m

Buenos Aires Ministro Pistarini

Tue 11/11

23:55-07:30

1 stop28h 35m

£784

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Tue 14/10

06:10-20:05

1 stop17h 55m

Buenos Aires Ministro Pistarini

Sat 25/10

13:00-10:15

1 stop17h 15m

£824

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Sat 1/11

13:35-07:20

2 stops44h 45m

Buenos Aires Ministro Pistarini

Mon 17/11

23:55-10:15

1 stop31h 20m

£828

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Tue 10/3

18:45-14:40

2 stops22h 55m

Buenos Aires Jorge Newbery

Tue 24/3

12:40-14:05

1 stop22h 25m

£843

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Wed 25/2

19:05-16:00

2 stops23h 55m

Buenos Aires Jorge Newbery

Mon 9/3

14:55-14:05

1 stop20h 10m

£874

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?

In general, January is the cheapest month to fly from London Heathrow Airport to Buenos Aires. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £848. 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 £856.

What is the cheapest day to depart on your flight to Buenos Aires?

The cheapest day to depart on your flight to Buenos Aires is on a Tuesday when prices can be found for as low as £987. This is often the case because there is less demand to fly during this day of the week. On the other hand, Friday is the most expensive day to depart from London Heathrow Airport because it is more convenient for both business and leisure travellers. As a result, prices tend to be around £1,122.

What is the cheapest time of day to depart on your flight to Buenos Aires?

Our most recent data shows that the best time of day to fly to Buenos Aires is in the afternoon. Flights from London Heathrow Airport to Buenos Aires during this time can be as low as £815. Flights to Buenos Aires are more costly in the evening, with an average ticket price of £1,048. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest London Heathrow to Buenos Aires flight route?

Fly from London Heathrow to Buenos Aires Ministro Pistarini for the best London Heathrow - Buenos Aires flight prices

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 £1,001 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 £853 on momondo.

What cabin class options are available on London Heathrow to Buenos Aires flights?

There are 2 cabin classes available to choose from on London Heathrow to Buenos Aires flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on London Heathrow Airport to Buenos Aires flights?

You could potentially save up to 24% on your flight if you consider stops on a London Heathrow Airport to Buenos Aires flight.

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

As of September 2025, prices for London Heathrow Airport to Buenos Aires flights are approximately 26% 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

£1,189

Fastest flight time

16h 25m

Direct flights

Mon, Wed, Thu, Fri, Sat and Sun

Airports in Buenos Aires

1 airport
The best flight deal from London Heathrow Airport to Buenos Aires found on momondo in the last 72 hours is £1,189
The fastest flight from London Heathrow Airport to Buenos Aires takes 16h 25m
Direct flights go from London Heathrow Airport to Buenos Aires on Monday, Wednesday, Thursday, Friday, Saturday and Sunday. There are no airlines offering direct flights..
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?

    Buenos Aires is 6898.3 mi away from London Heathrow. In terms of flight time, this usually takes a little over 17h 55m.

  • 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 many operators does momondo search for flights from London Heathrow Airport to Buenos Aires?

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to 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 you'll need for your trip to Buenos Aires may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Buenos Aires. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

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

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

Best airlines flying from London Heathrow Airport to Buenos Aires

Compare and see reviews for airlines that fly from London Heathrow Airport to Buenos Aires with momondo
Airline
Rating
Free Cancellation
Price
Air FrancePriceFrom £442Free CancellationRating
7.4
1,469 reviews
Search Air France flights
Air CanadaPriceFrom £639Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights
IberiaPriceFrom £706Free CancellationRating
7.0
2,929 reviews
Search Iberia flights
FinnairPriceFrom £731Free CancellationRating
7.6
1,323 reviews
Search Finnair flights
British AirwaysPriceFrom £786Free CancellationRating
6.6
7,361 reviews
Search British Airways flights
LufthansaPriceFrom £814Free CancellationRating
6.8
7,409 reviews
Search Lufthansa flights
American AirlinesPriceFrom £863Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
LATAM AirlinesPriceFrom £897Free CancellationRating
7.5
1,847 reviews
Search LATAM Airlines flights

  • Finnair Flights From London Heathrow Airport to Buenos Aires

    Finnair flies from London Heathrow Airport to Buenos Aires around 6 times per week, with 1,323 momondo users rating the airline 7.6/10. The cheapest Finnair deal from London Heathrow Airport to Buenos Aires in the last 72 hours was £990 (round-trip), much lower than the average airfare cost of £1,268 for Finnair flights on this route.

  • Iberia Flights From London Heathrow Airport to Buenos Aires

    Iberia is also a popular choice for this route. Iberia flight deals for London Heathrow Airport to Buenos Aires start from as low as £956 round-trip, depending on your selected dates, with average Iberia deals seen on momondo around £1,285. Iberia operates 6 flights to Buenos Aires from London Heathrow Airport in an average week. Users have rated it 7.0/10 across 2,929 reviews.

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from London to Buenos Aires . Millions of users trust and use momondo every year so you are in good hands.

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 17.0 mi from Buenos Aires
Buenos Aires Jorge Newbery Airport
Buenos Aires Ministro Pistarini Airport