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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 21/1. 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.
Multiple Airlines Logo
21:40 - 15:50LHR-EZE
21h 10m1 stop
Multiple Airlines Logo
01:40 - 12:15EZE-LHR
31h 35m2 stops
£801Multiple Airlines
Find Deal
Tue, 3 Mar - Mon, 16 Mar
Avianca Logo
22:05 - 05:40LHR-AEP
35h 35m1 stop
Avianca Logo
07:00 - 15:35AEP-LHR
28h 35m1 stop
£802Avianca
Find Deal
Wed, 6 May - Thu, 14 May
Turkish Airlines Logo
17:45 - 22:25LHR-EZE
55h 40m2 stops
Turkish Airlines Logo
23:55 - 14:45EZE-LHR
35h 50m2 stops
£802Turkish Airlines
Find Deal
Mon, 2 Mar - Wed, 25 Mar
Avianca Logo
22:05 - 15:20LHR-EZE
21h 15m1 stop
Avianca Logo
06:50 - 15:35EZE-LHR
28h 45m1 stop
£803Avianca
Find Deal
Wed, 15 Apr - Wed, 22 Apr
Air Canada Logo
14:05 - 14:30LHR-EZE
52h 25m3 stops
Air Canada Logo
16:35 - 06:35EZE-LHR
34h 00m2 stops
£804Air Canada
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Sat, 2 May - Wed, 13 May
Multiple Airlines Logo
21:40 - 05:50LHR-EZE
35h 10m1 stop
Multiple Airlines Logo
06:50 - 10:50EZE-LHR
24h 00m2 stops
£804Multiple Airlines
Find Deal
Sat, 14 Mar - Tue, 31 Mar
LATAM Airlines Logo
20:15 - 09:40LHR-AEP
16h 25m1 stop
LATAM Airlines Logo
14:55 - 15:05AEP-LHR
20h 10m1 stop
£805LATAM Airlines
Find Deal
Thu, 26 Mar - Sat, 25 Apr
Multiple Airlines Logo
21:40 - 15:50LHR-EZE
21h 10m1 stop
Multiple Airlines Logo
01:40 - 15:00EZE-LHR
34h 20m2 stops
£805Multiple Airlines
Find Deal
Wed, 18 Mar - Tue, 24 Mar
Iberia Logo
19:05 - 08:40LHR-EZE
16h 35m1 stop
Iberia Logo
13:00 - 08:25EZE-LHR
15h 25m1 stop
£810Iberia
Find Deal
Sat, 28 Mar - Tue, 21 Apr
LATAM Airlines Logo
20:15 - 11:40LHR-AEP
18h 25m1 stop
LATAM Airlines Logo
14:55 - 15:05AEP-LHR
20h 10m1 stop
£831LATAM Airlines
Find Deal
Fri, 27 Mar - Mon, 27 Apr

Iberia flights from London Heathrow Airport to Buenos Aires

Our best Iberia deals on London Heathrow Airport to Buenos Aires flight tickets
Iberia
28 Mar
LHR19:05London Heathrow
16h 35m
1 stop
EZE08:40Buenos Aires Ministro Pistarini
21 Apr
EZE13:00Buenos Aires Ministro Pistarini
15h 25m
1 stop
LHR08:25London Heathrow
£810
Find similar
Iberia
28 Mar
LHR19:05London Heathrow
16h 35m
1 stop
EZE08:40Buenos Aires Ministro Pistarini
26 Apr
EZE21:40Buenos Aires Ministro Pistarini
15h 35m
1 stop
LHR17:15London Heathrow
£823
Find similar
Iberia
10 Feb
LHR19:40London Heathrow
25h 15m
1 stop
EZE17:55Buenos Aires Ministro Pistarini
26 Feb
EZE22:45Buenos Aires Ministro Pistarini
16h 30m
1 stop
LHR18:15London Heathrow
£826
Find similar

Avianca flights from London Heathrow Airport to Buenos Aires

Our best Avianca deals on London Heathrow Airport to Buenos Aires flight tickets
Avianca
6 May
LHR22:05London Heathrow
35h 35m
1 stop
AEP05:40Buenos Aires Jorge Newbery
14 May
AEP07:00Buenos Aires Jorge Newbery
28h 35m
1 stop
LHR15:35London Heathrow
£802
Find similar
Avianca
15 Apr
LHR22:05London Heathrow
21h 15m
1 stop
EZE15:20Buenos Aires Ministro Pistarini
22 Apr
EZE06:50Buenos Aires Ministro Pistarini
28h 45m
1 stop
LHR15:35London Heathrow
£803
Find similar
Avianca
3 Mar
LHR21:40London Heathrow
35h 00m
1 stop
AEP05:40Buenos Aires Jorge Newbery
31 Mar
AEP07:00Buenos Aires Jorge Newbery
28h 35m
1 stop
LHR15:35London Heathrow
£808
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 27 November 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

Tue 3/3

21:40-15:50

1 stop21h 10m

Buenos Aires Ministro Pistarini

Mon 16/3

01:40-12:15

2 stops31h 35m

£801

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Wed 6/5

22:05-05:40

1 stop35h 35m

Buenos Aires Jorge Newbery

Thu 14/5

07:00-15:35

1 stop28h 35m

£802

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Mon 2/3

17:45-22:25

2 stops55h 40m

Buenos Aires Ministro Pistarini

Wed 25/3

23:55-14:45

2 stops35h 50m

£802

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Wed 15/4

22:05-15:20

1 stop21h 15m

Buenos Aires Ministro Pistarini

Wed 22/4

06:50-15:35

1 stop28h 45m

£803

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Sat 2/5

14:05-14:30

3 stops52h 25m

Buenos Aires Ministro Pistarini

Wed 13/5

16:35-06:35

2 stops34h 00m

£804

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Sat 14/3

21:40-05:50

1 stop35h 10m

Buenos Aires Ministro Pistarini

Tue 31/3

06:50-10:50

2 stops24h 00m

£804

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Thu 26/3

20:15-09:40

1 stop16h 25m

Buenos Aires Jorge Newbery

Sat 25/4

14:55-15:05

1 stop20h 10m

£805

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Wed 18/3

21:40-15:50

1 stop21h 10m

Buenos Aires Ministro Pistarini

Tue 24/3

01:40-15:00

2 stops34h 20m

£805

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Sat 28/3

19:05-08:40

1 stop16h 35m

Buenos Aires Ministro Pistarini

Tue 21/4

13:00-08:25

1 stop15h 25m

£810

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Fri 27/3

20:15-11:40

1 stop18h 25m

Buenos Aires Jorge Newbery

Mon 27/4

14:55-15:05

1 stop20h 10m

£831

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 £891. If you don’t want to visit Buenos Aires in February, then you should wait until March to fly from London Heathrow Airport, when ticket prices are also cheap, with an average price of £901.

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 £1,009. 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 £1,173.

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 £836. Flights to Buenos Aires are more costly in the evening, with an average ticket price of £1,085. 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 £1,038 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 £876 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 37% 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 November 2025, prices for London Heathrow Airport to Buenos Aires flights are approximately 15% 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

Best price found

£794

Fastest flight time

16h 25m

Direct flights

Every day

Airports in Buenos Aires

1 airport
The best one-way flight to Buenos Aires from London Heathrow Airport in the past 72 hours is £794. The best return flight deal from London Heathrow Airport to Buenos Aires found on momondo in the last 72 hours is £1,143.
The fastest flight from London Heathrow Airport to Buenos Aires takes 16h 25m
Direct flights go from London Heathrow Airport to Buenos Aires every day.
There is 1 airport near Buenos Aires: 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 00m.

  • 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 £454Free CancellationRating
7.4
1,498 reviews
Search Air France flights
AviancaPriceFrom £712Free CancellationRating
6.6
2,477 reviews
Search Avianca flights
IberiaPriceFrom £733Free CancellationRating
7.0
3,036 reviews
Search Iberia flights
FinnairPriceFrom £749Free CancellationRating
7.6
1,334 reviews
Search Finnair flights
British AirwaysPriceFrom £819Free CancellationRating
6.7
7,539 reviews
Search British Airways flights
LufthansaPriceFrom £833Free CancellationRating
6.8
7,594 reviews
Search Lufthansa flights
LATAM AirlinesPriceFrom £886Free CancellationRating
7.5
1,886 reviews
Search LATAM Airlines flights
American AirlinesPriceFrom £891Free CancellationRating
7.2
11,037 reviews
Search American Airlines flights
KLMPriceFrom £1,041Free CancellationRating
7.7
1,423 reviews
Search KLM 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 1,334 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 £749 (round-trip), much lower than the average airfare cost of £1,099 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 £733 round-trip, depending on your selected dates, with average Iberia deals seen on momondo around £923. Iberia operates 7 flights to Buenos Aires from London Heathrow Airport in an average week. Users have rated it 7.0/10 across 3,035 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