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Cheap flights from London Heathrow Airport to Buenos Aires from £455

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 28/1. 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.
Air Canada Logo
13:25 - 15:10
LHR
-
EZE
52h 45m
3 stops
Air Canada Logo
16:45 - 07:10
EZE
-
LHR
35h 25m
3 stops
£817Air Canada
mer., 18 mars - mer., 25 mars
Air Canada Logo
14:05 - 14:30
LHR
-
EZE
52h 25m
3 stops
Air Canada Logo
16:35 - 06:35
EZE
-
LHR
34h 00m
2 stops
£820Air Canada
sam., 25 avr. - mer., 13 mai
United Airlines Logo
11:35 - 06:20
LHR
-
EZE
45h 45m
2 stops
United Airlines Logo
21:05 - 07:30
EZE
-
LHR
31h 25m
1 stop
£823United Airlines
sam., 7 mars - mar., 24 mars
Air Canada Logo
14:05 - 14:30
LHR
-
EZE
52h 25m
3 stops
Air Canada Logo
16:35 - 06:35
EZE
-
LHR
34h 00m
3 stops
£824Air Canada
sam., 25 avr. - mer., 13 mai
British Airways Logo
22:00 - 11:45
LHR
-
EZE
16h 45m
1 stop
British Airways Logo
19:20 - 17:15
EZE
-
LHR
18h 55m
1 stop
£825British Airways
jeu., 5 mars - ven., 13 mars
Avianca Logo
21:40 - 05:40
LHR
-
AEP
35h 00m
1 stop
Avianca Logo
07:00 - 15:35
AEP
-
LHR
28h 35m
1 stop
£825Avianca
dim., 15 mars - dim., 29 mars
Avianca Logo
21:40 - 15:50
LHR
-
EZE
21h 10m
1 stop
Avianca Logo
07:30 - 14:35
EZE
-
LHR
28h 05m
1 stop
£827Avianca
ven., 6 mars - jeu., 19 mars
British Airways Logo
22:00 - 11:45
LHR
-
EZE
16h 45mdirect
British Airways Logo
14:20 - 09:15
EZE
-
LHR
15h 55m
1 stop
£828British Airways
jeu., 5 mars - mar., 17 mars
LATAM Airlines Logo
20:15 - 09:40
LHR
-
AEP
16h 25m
1 stop
LATAM Airlines Logo
18:20 - 14:05
AEP
-
LHR
16h 45m
1 stop
£838LATAM Airlines
mar., 10 mars - mar., 24 mars
LATAM Airlines Logo
20:15 - 09:40
LHR
-
AEP
16h 25m
1 stop
LATAM Airlines Logo
14:55 - 14:05
AEP
-
LHR
20h 10m
1 stop
£840LATAM Airlines
lun., 9 mars - mar., 24 mars

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
7 Mar
LHR11:35London Heathrow
45h 45m
2 stops
EZE06:20Buenos Aires Ministro Pistarini
24 Mar
EZE21:05Buenos Aires Ministro Pistarini
31h 25m
1 stop
LHR07:30London Heathrow
£823
United Airlines
8 Feb
LHR12:05London Heathrow
24h 15m
1 stop
EZE09:20Buenos Aires Ministro Pistarini
17 Feb
EZE23:55Buenos Aires Ministro Pistarini
28h 35m
1 stop
LHR07:30London Heathrow
£835
United Airlines
10 Feb
LHR12:05London Heathrow
22h 15m
1 stop
EZE07:20Buenos Aires Ministro Pistarini
24 Feb
EZE22:05Buenos Aires Ministro Pistarini
32h 05m
2 stops
LHR09:10London Heathrow
£836

Turkish Airlines flights from London Heathrow Airport to Buenos Aires

Our best Turkish Airlines deals on London Heathrow Airport to Buenos Aires flight tickets
Turkish Airlines
13 Mar
LHR11:30London Heathrow
37h 55m
2 stops
EZE22:25Buenos Aires Ministro Pistarini
6 Apr
EZE23:55Buenos Aires Ministro Pistarini
36h 55m
2 stops
LHR16:50London Heathrow
£842
Turkish Airlines
6 Feb
LHR22:35London Heathrow
26h 50m
2 stops
EZE22:25Buenos Aires Ministro Pistarini
13 Apr
EZE23:55Buenos Aires Ministro Pistarini
29h 40m
2 stops
LHR09:35London Heathrow
£849
Turkish Airlines
21 Jun
LHR13:15London Heathrow
37h 10m
2 stops
EZE22:25Buenos Aires Ministro Pistarini
14 Jul
EZE23:55Buenos Aires Ministro Pistarini
42h 30m
2 stops
LHR22:25London Heathrow
£850

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 22 janvier 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

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

mer. 18/3

13:25-15:10

3 stops52h 45m

Buenos Aires Ministro Pistarini

mer. 25/3

16:45-07:10

3 stops35h 25m

£817

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

sam. 25/4

14:05-14:30

3 stops52h 25m

Buenos Aires Ministro Pistarini

mer. 13/5

16:35-06:35

2 stops34h 00m

£820

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

sam. 7/3

11:35-06:20

2 stops45h 45m

Buenos Aires Ministro Pistarini

mar. 24/3

21:05-07:30

1 stop31h 25m

£823

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

sam. 25/4

14:05-14:30

3 stops52h 25m

Buenos Aires Ministro Pistarini

mer. 13/5

16:35-06:35

3 stops34h 00m

£824

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

jeu. 5/3

22:00-11:45

1 stop16h 45m

Buenos Aires Ministro Pistarini

ven. 13/3

19:20-17:15

1 stop18h 55m

£825

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

dim. 15/3

21:40-05:40

1 stop35h 00m

Buenos Aires Jorge Newbery

dim. 29/3

07:00-15:35

1 stop28h 35m

£825

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

ven. 6/3

21:40-15:50

1 stop21h 10m

Buenos Aires Ministro Pistarini

jeu. 19/3

07:30-14:35

1 stop28h 05m

£827

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

jeu. 5/3

22:00-11:45

Nonstop16h 45m

Buenos Aires Ministro Pistarini

mar. 17/3

14:20-09:15

1 stop15h 55m

£828

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

mar. 10/3

20:15-09:40

1 stop16h 25m

Buenos Aires Jorge Newbery

mar. 24/3

18:20-14:05

1 stop16h 45m

£838

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

lun. 9/3

20:15-09:40

1 stop16h 25m

Buenos Aires Jorge Newbery

mar. 24/3

14:55-14:05

1 stop20h 10m

£840

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 cheapest month to fly to Buenos Aires?

In general, February 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 £897. If you don’t want to visit Buenos Aires in February, then you should wait until May to fly from London Heathrow Airport, when ticket prices are also cheap, with an average price of £904.

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 Monday when prices can be found for as low as £988. This is often the case because there is less demand to fly during this day of the week. On the other hand, Saturday 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 £1,153.

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 £1,031 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 £861 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 46% 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 January 2026, prices for London Heathrow Airport to Buenos Aires flights are approximately 24% 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

£911

Fastest flight time

16h 05m

Direct flights

Every day

Airports in Buenos Aires

2 airports
The best flight deal from London Heathrow Airport to Buenos Aires found on momondo in the last 72 hours is £911
The fastest flight from London Heathrow Airport to Buenos Aires takes 16h 05m
Direct flights go from London Heathrow Airport to Buenos Aires every day.
There are 2 airports in Buenos Aires. From London Heathrow Airport there are direct flights to Buenos Aires Ministro Pistarini (EZE).
Search flight deals

  • 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 16h 05m.

  • 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
AviancaPriceFrom £700Free CancellationRating
6.6
2,496 reviews
Search Avianca flights
IberiaPriceFrom £718Free CancellationRating
7.0
3,097 reviews
Search Iberia flights
FinnairPriceFrom £754Free CancellationRating
7.6
1,353 reviews
Search Finnair flights
Air FrancePriceFrom £768Free CancellationRating
7.4
1,523 reviews
Search Air France flights
British AirwaysPriceFrom £810Free CancellationRating
6.7
7,690 reviews
Search British Airways flights
American AirlinesPriceFrom £867Free CancellationRating
7.2
11,176 reviews
Search American Airlines flights
LufthansaPriceFrom £906Free CancellationRating
6.8
7,742 reviews
Search Lufthansa flights
LATAM AirlinesPriceFrom £937Free CancellationRating
7.5
1,913 reviews
Search LATAM Airlines flights

  • Finnair Flights From London Heathrow Airport to Buenos Aires

    Finnair flies from London Heathrow Airport to Buenos Aires around 7 times per week, with 1,353 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 £754 (round-trip), much lower than the average airfare cost of £1,090 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 £718 round-trip, depending on your selected dates, with average Iberia deals seen on momondo around £905. Iberia operates 7 flights to Buenos Aires from London Heathrow Airport in an average week. Users have rated it 7.0/10 across 3,097 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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sam. 21/2
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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