Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from London Heathrow Airport to Buenos Aires from £517

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 13/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

Voted winner of Europe's Best Travel App 2023

Save money when you book flights with momondo

Big names, great deals

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

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
16:55 - 14:35EZE-LHR
18h 40m1 stop
£699Avianca
Find Deal
Tue, 28 Oct - Sat, 15 Nov
Avianca Logo
21:40 - 05:50LHR-EZE
35h 10m1 stop
Avianca Logo
01:40 - 14:35EZE-LHR
33h 55m1 stop
£709Avianca
Find Deal
Thu, 6 Nov - Sun, 16 Nov
Avianca Logo
21:40 - 15:50LHR-EZE
21h 10m1 stop
Avianca Logo
16:55 - 14:35EZE-LHR
18h 40m1 stop
£711Avianca
Find Deal
Wed, 19 Nov - Mon, 9 Mar
Turkish Airlines Logo
06:35 - 22:25LHR-EZE
42h 50m2 stops
Turkish Airlines Logo
23:55 - 15:05EZE-LHR
36h 10m2 stops
£766Turkish Airlines
Find Deal
Tue, 10 Feb - Tue, 10 Mar
United Airlines Logo
12:05 - 08:20LHR-EZE
23h 15m1 stop
United Airlines Logo
23:55 - 07:30EZE-LHR
28h 35m1 stop
£779United Airlines
Find Deal
Sun, 26 Oct - Sat, 8 Nov
United Airlines Logo
16:40 - 06:20LHR-EZE
41h 40m2 stops
United Airlines Logo
23:55 - 10:15EZE-LHR
31h 20m1 stop
£780United Airlines
Find Deal
Sat, 25 Oct - Thu, 13 Nov
Multiple Airlines Logo
14:05 - 17:30LHR-AEP
31h 25m2 stops
Multiple Airlines Logo
00:05 - 07:10AEP-LHR
52h 05m2 stops
£828Multiple Airlines
Find Deal
Sun, 12 Oct - Sat, 25 Oct
Multiple Airlines Logo
13:25 - 17:20LHR-AEP
30h 55m2 stops
Multiple Airlines Logo
13:40 - 11:20AEP-LHR
42h 40m2 stops
£849Multiple Airlines
Find Deal
Thu, 12 Mar - Thu, 26 Mar
LATAM Airlines Logo
20:15 - 14:00LHR-AEP
20h 45m1 stop
LATAM Airlines Logo
12:40 - 14:05AEP-LHR
22h 25m1 stop
£870LATAM Airlines
Find Deal
Sun, 16 Nov - Mon, 1 Dec
LATAM Airlines Logo
19:05 - 16:00LHR-AEP
23h 55m2 stops
LATAM Airlines Logo
12:40 - 14:05AEP-LHR
22h 25m1 stop
£871LATAM Airlines
Find Deal
Mon, 17 Nov - Sun, 7 Dec

Avianca flights from London Heathrow Airport to Buenos Aires

Our best Avianca deals on London Heathrow Airport to Buenos Aires flight tickets
Avianca
28 Oct
LHR21:40London Heathrow
35h 10m
1 stop
EZE05:50Buenos Aires Ministro Pistarini
15 Nov
EZE16:55Buenos Aires Ministro Pistarini
18h 40m
1 stop
LHR14:35London Heathrow
£699
Find similar
Avianca
6 Nov
LHR21:40London Heathrow
35h 10m
1 stop
EZE05:50Buenos Aires Ministro Pistarini
16 Nov
EZE01:40Buenos Aires Ministro Pistarini
33h 55m
1 stop
LHR14:35London Heathrow
£709
Find similar
Avianca
19 Nov
LHR21:40London Heathrow
21h 10m
1 stop
EZE15:50Buenos Aires Ministro Pistarini
9 Mar
EZE16:55Buenos Aires Ministro Pistarini
18h 40m
1 stop
LHR14:35London Heathrow
£711
Find similar

American Airlines flights from London Heathrow Airport to Buenos Aires

Our best American Airlines deals on London Heathrow Airport to Buenos Aires flight tickets
American Airlines
18 Sept
LHR14:10London Heathrow
24h 05m
1 stop
EZE10:15Buenos Aires Ministro Pistarini
26 Sept
EZE20:40Buenos Aires Ministro Pistarini
31h 05m
2 stops
LHR07:45London Heathrow
£863
Find similar
American Airlines
18 Sept
LHR14:10London Heathrow
24h 05m
1 stop
EZE10:15Buenos Aires Ministro Pistarini
22 Oct
EZE22:30Buenos Aires Ministro Pistarini
28h 25m
1 stop
LHR06:55London Heathrow
£866
Find similar
American Airlines
25 Sept
LHR18:05London Heathrow
20h 10m
1 stop
EZE10:15Buenos Aires Ministro Pistarini
17 Oct
EZE21:15Buenos Aires Ministro Pistarini
29h 05m
1 stop
LHR06:20London Heathrow
£868
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 18 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

Tue 28/10

21:40-05:50

1 stop35h 10m

Buenos Aires Ministro Pistarini

Sat 15/11

16:55-14:35

1 stop18h 40m

£699

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Thu 6/11

21:40-05:50

1 stop35h 10m

Buenos Aires Ministro Pistarini

Sun 16/11

01:40-14:35

1 stop33h 55m

£709

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Wed 19/11

21:40-15:50

1 stop21h 10m

Buenos Aires Ministro Pistarini

Mon 9/3

16:55-14:35

1 stop18h 40m

£711

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Tue 10/2

06:35-22:25

2 stops42h 50m

Buenos Aires Ministro Pistarini

Tue 10/3

23:55-15:05

2 stops36h 10m

£766

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Sun 26/10

12:05-08:20

1 stop23h 15m

Buenos Aires Ministro Pistarini

Sat 8/11

23:55-07:30

1 stop28h 35m

£779

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Sat 25/10

16:40-06:20

2 stops41h 40m

Buenos Aires Ministro Pistarini

Thu 13/11

23:55-10:15

1 stop31h 20m

£780

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Sun 12/10

14:05-17:30

2 stops31h 25m

Buenos Aires Jorge Newbery

Sat 25/10

00:05-07:10

2 stops52h 05m

£828

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Thu 12/3

13:25-17:20

2 stops30h 55m

Buenos Aires Jorge Newbery

Thu 26/3

13:40-11:20

2 stops42h 40m

£849

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Sun 16/11

20:15-14:00

1 stop20h 45m

Buenos Aires Jorge Newbery

Mon 1/12

12:40-14:05

1 stop22h 25m

£870

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Mon 17/11

19:05-16:00

2 stops23h 55m

Buenos Aires Jorge Newbery

Sun 7/12

12:40-14:05

1 stop22h 25m

£871

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 £851. If you don’t want to visit Buenos Aires in February, then you should wait until January to fly from London Heathrow Airport, when ticket prices are also cheap, with an average price of £857.

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 £983. 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 £1,113.

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 £809. Flights to Buenos Aires are more costly in the evening, with an average ticket price of £1,042. 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 £993 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 £854 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 9% 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

£1,278

Fastest flight time

16h 25m

Direct flights

Every day

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 £1,278
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 19h 15m.

  • 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 £439Free CancellationRating
7.4
1,468 reviews
Search Air France flights
Air CanadaPriceFrom £634Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights
AviancaPriceFrom £695Free CancellationRating
6.7
2,436 reviews
Search Avianca flights
IberiaPriceFrom £706Free CancellationRating
7.0
2,925 reviews
Search Iberia flights
FinnairPriceFrom £725Free CancellationRating
7.6
1,324 reviews
Search Finnair flights
British AirwaysPriceFrom £785Free CancellationRating
6.7
7,367 reviews
Search British Airways flights
LufthansaPriceFrom £808Free CancellationRating
6.8
7,409 reviews
Search Lufthansa flights
LATAM AirlinesPriceFrom £857Free CancellationRating
7.5
1,849 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 1,324 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 £964 round-trip, depending on your selected dates, with average Iberia deals seen on momondo around £1,305. Iberia operates 6 flights to Buenos Aires from London Heathrow Airport in an average week. Users have rated it 7.0/10 across 2,925 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.

An easier way to manage your Buenos Aires trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sat 18/10
Sat 25/10
By creating a price alert you accept our terms of use and privacy policy.

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