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Cheap flights from London Heathrow Airport to Buenos Aires from £454

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 22/2. 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.
Avianca Logo
21:40 - 05:40
LHR
-
AEP
35h 00m
1 stop
Avianca Logo
07:00 - 15:35
AEP
-
LHR
28h 35m
1 stop
£766Avianca
Wed, 11 Mar - Tue, 31 Mar
Avianca Logo
22:05 - 00:25
LHR
-
EZE
30h 20m
1 stop
Avianca Logo
16:50 - 15:35
EZE
-
LHR
18h 45m
1 stop
£767Avianca
Sun, 31 May - Mon, 29 Jun
Avianca Logo
21:40 - 05:40
LHR
-
AEP
35h 00m
1 stop
Avianca Logo
07:00 - 14:35
AEP
-
LHR
28h 35m
1 stop
£767Avianca
Mon, 16 Mar - Mon, 23 Mar
Avianca Logo
22:05 - 15:40
LHR
-
EZE
21h 35m
1 stop
Avianca Logo
16:50 - 15:35
EZE
-
LHR
18h 45m
1 stop
£767Avianca
Sat, 16 May - Sun, 7 Jun
Avianca Logo
21:40 - 05:50
LHR
-
EZE
35h 10m
1 stop
Avianca Logo
16:55 - 14:35
EZE
-
LHR
18h 40m
1 stop
£769Avianca
Sun, 15 Mar - Wed, 18 Mar
Lufthansa Logo
15:30 - 06:25
LHR
-
EZE
18h 55m
1 stop
Lufthansa Logo
16:35 - 15:40
EZE
-
LHR
19h 05m
2 stops
£776Lufthansa
Wed, 20 May - Sun, 7 Jun
SWISS Logo
20:05 - 11:50
LHR
-
EZE
42h 45m
2 stops
SWISS Logo
13:30 - 17:50
EZE
-
LHR
24h 20m
2 stops
£778SWISS
Mon, 23 Mar - Wed, 22 Apr
Turkish Airlines Logo
22:35 - 22:25
LHR
-
EZE
51h 50m
2 stops
Turkish Airlines Logo
23:55 - 15:10
EZE
-
LHR
35h 15m
2 stops
£779Turkish Airlines
Wed, 13 May - Wed, 20 May
United Airlines Logo
09:10 - 07:20
LHR
-
EZE
25h 10m
2 stops
United Airlines Logo
22:55 - 06:20
EZE
-
LHR
28h 25m
2 stops
£780United Airlines
Thu, 19 Feb - Thu, 19 Mar
United Airlines Logo
12:05 - 07:20
LHR
-
EZE
22h 15m
1 stop
United Airlines Logo
22:55 - 07:30
EZE
-
LHR
29h 35m
1 stop
£781United Airlines
Thu, 19 Feb - Mon, 16 Mar

Lufthansa flights from London Heathrow Airport to Buenos Aires

Our best Lufthansa deals on London Heathrow Airport to Buenos Aires flight tickets
Lufthansa
16 Feb
LHR12:05London Heathrow
24h 15m
1 stop
EZE09:20Buenos Aires Ministro Pistarini
26 Feb
EZE22:05Buenos Aires Ministro Pistarini
33h 10m
1 stop
LHR10:15London Heathrow
£751
Lufthansa
20 May
LHR15:30London Heathrow
18h 55m
1 stop
EZE06:25Buenos Aires Ministro Pistarini
7 Jun
EZE16:35Buenos Aires Ministro Pistarini
19h 05m
2 stops
LHR15:40London Heathrow
£776
Lufthansa
4 Jun
LHR07:25London Heathrow
27h 00m
2 stops
EZE06:25Buenos Aires Ministro Pistarini
7 Jun
EZE16:35Buenos Aires Ministro Pistarini
22h 05m
1 stop
LHR18:40London Heathrow
£788

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
19 Feb
LHR12:05London Heathrow
22h 15m
1 stop
EZE07:20Buenos Aires Ministro Pistarini
19 Mar
EZE21:05Buenos Aires Ministro Pistarini
30h 15m
2 stops
LHR06:20London Heathrow
£780
United Airlines
19 Feb
LHR12:05London Heathrow
22h 15m
1 stop
EZE07:20Buenos Aires Ministro Pistarini
16 Mar
EZE22:55Buenos Aires Ministro Pistarini
29h 35m
1 stop
LHR07:30London Heathrow
£781
United Airlines
19 Feb
LHR11:10London Heathrow
47h 10m
2 stops
EZE07:20Buenos Aires Ministro Pistarini
1 Mar
EZE23:55Buenos Aires Ministro Pistarini
32h 20m
2 stops
LHR11:15London Heathrow
£781

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 9 February 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 - AEP

LHRAEP

London Heathrow

Wed 11/3

21:40-05:40

1 stop35h 00m

Buenos Aires Jorge Newbery

Tue 31/3

07:00-15:35

1 stop28h 35m

£766

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Sun 31/5

22:05-00:25

1 stop30h 20m

Buenos Aires Ministro Pistarini

Mon 29/6

16:50-15:35

1 stop18h 45m

£767

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Mon 16/3

21:40-05:40

1 stop35h 00m

Buenos Aires Jorge Newbery

Mon 23/3

07:00-14:35

1 stop28h 35m

£767

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Sat 16/5

22:05-15:40

1 stop21h 35m

Buenos Aires Ministro Pistarini

Sun 7/6

16:50-15:35

1 stop18h 45m

£767

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Sun 15/3

21:40-05:50

1 stop35h 10m

Buenos Aires Ministro Pistarini

Wed 18/3

16:55-14:35

1 stop18h 40m

£769

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Wed 20/5

15:30-06:25

1 stop18h 55m

Buenos Aires Ministro Pistarini

Sun 7/6

16:35-15:40

2 stops19h 05m

£776

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Mon 23/3

20:05-11:50

2 stops42h 45m

Buenos Aires Ministro Pistarini

Wed 22/4

13:30-17:50

2 stops24h 20m

£778

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Wed 13/5

22:35-22:25

2 stops51h 50m

Buenos Aires Ministro Pistarini

Wed 20/5

23:55-15:10

2 stops35h 15m

£779

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Thu 19/2

09:10-07:20

2 stops25h 10m

Buenos Aires Ministro Pistarini

Thu 19/3

22:55-06:20

2 stops28h 25m

£780

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Thu 19/2

12:05-07:20

1 stop22h 15m

Buenos Aires Ministro Pistarini

Mon 16/3

22:55-07:30

1 stop29h 35m

£781

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, September 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 September, then you should wait until November 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 £965. 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 £1,120.

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 £1,032 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 £866 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 30% 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 February 2026, prices for London Heathrow Airport to Buenos Aires flights are approximately 44% 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

£908

Fastest flight time

16h 10m

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 £908
The fastest flight from London Heathrow Airport to Buenos Aires takes 16h 10m
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 10m.

  • 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 £683Free CancellationRating
6.5
2,498 reviews
Search Avianca flights
IberiaPriceFrom £708Free CancellationRating
7.0
3,110 reviews
Search Iberia flights
FinnairPriceFrom £743Free CancellationRating
7.6
1,360 reviews
Search Finnair flights
Air FrancePriceFrom £757Free CancellationRating
7.4
1,531 reviews
Search Air France flights
British AirwaysPriceFrom £820Free CancellationRating
6.7
7,724 reviews
Search British Airways flights
American AirlinesPriceFrom £855Free CancellationRating
7.2
11,259 reviews
Search American Airlines flights
LufthansaPriceFrom £896Free CancellationRating
6.8
7,777 reviews
Search Lufthansa flights
LATAM AirlinesPriceFrom £908Free CancellationRating
7.5
1,919 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 1,360 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 £743 (round-trip), much lower than the average airfare cost of £1,075 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 £708 round-trip, depending on your selected dates, with average Iberia deals seen on momondo around £893. Iberia operates 7 flights to Buenos Aires from London Heathrow Airport in an average week. Users have rated it 7.0/10 across 3,110 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