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Cheap flights from London Heathrow Airport to Buenos Aires from £452

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 15/3. 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
22:05 - 05:40
LHR
-
AEP
35h 35m
1 stop
Avianca Logo
07:00 - 15:35
AEP
-
LHR
28h 35m
1 stop
£779Avianca
Mon, 1 Jun - Tue, 30 Jun
United Airlines Logo
10:00 - 07:20
LHR
-
EZE
24h 20m
1 stop
United Airlines Logo
22:05 - 07:30
EZE
-
LHR
30h 25m
1 stop
£781United Airlines
Mon, 9 Feb - Tue, 24 Feb
Avianca Logo
22:05 - 05:40
LHR
-
AEP
35h 35m
1 stop
Avianca Logo
07:00 - 15:35
AEP
-
LHR
28h 35m
1 stop
£782Avianca
Mon, 1 Jun - Mon, 22 Jun
United Airlines Logo
12:05 - 07:20
LHR
-
EZE
22h 15m
1 stop
United Airlines Logo
21:05 - 07:30
EZE
-
LHR
31h 25m
1 stop
£782United Airlines
Mon, 2 Mar - Sun, 8 Mar
Air Canada Logo
08:45 - 14:30
LHR
-
EZE
33h 45m
3 stops
Air Canada Logo
16:35 - 06:35
EZE
-
LHR
34h 00m
2 stops
£783Air Canada
Tue, 14 Apr - Mon, 11 May
Avianca Logo
21:40 - 05:40
LHR
-
AEP
35h 00m
1 stop
Avianca Logo
07:00 - 15:35
AEP
-
LHR
28h 35m
1 stop
£783Avianca
Wed, 11 Mar - Mon, 30 Mar
Turkish Airlines Logo
22:35 - 22:25
LHR
-
EZE
50h 50m
2 stops
Turkish Airlines Logo
23:55 - 14:10
EZE
-
LHR
35h 15m
2 stops
£783Turkish Airlines
Mon, 9 Mar - Tue, 17 Mar
United Airlines Logo
06:55 - 08:00
LHR
-
EZE
29h 05m
2 stops
United Airlines Logo
21:00 - 07:40
EZE
-
LHR
30h 40m
1 stop
£785United Airlines
Mon, 13 Apr - Sun, 19 Apr
United Airlines Logo
12:05 - 09:20
LHR
-
EZE
24h 15m
1 stop
United Airlines Logo
22:55 - 07:30
EZE
-
LHR
29h 35m
1 stop
£785United Airlines
Thu, 26 Feb - Thu, 19 Mar
Avianca Logo
21:40 - 05:40
LHR
-
AEP
35h 00m
1 stop
Avianca Logo
07:00 - 14:35
AEP
-
LHR
28h 35m
1 stop
£787Avianca
Mon, 9 Mar - Wed, 25 Mar

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
9 Feb
LHR10:00London Heathrow
24h 20m
1 stop
EZE07:20Buenos Aires Ministro Pistarini
24 Feb
EZE22:05Buenos Aires Ministro Pistarini
30h 25m
1 stop
LHR07:30London Heathrow
£781
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
£782
United Airlines
14 Feb
LHR12:05London Heathrow
24h 15m
1 stop
EZE09:20Buenos Aires Ministro Pistarini
28 Feb
EZE23:55Buenos Aires Ministro Pistarini
31h 20m
1 stop
LHR10:15London Heathrow
£785

SWISS flights from London Heathrow Airport to Buenos Aires

Our best SWISS deals on London Heathrow Airport to Buenos Aires flight tickets
SWISS
16 Mar
LHR20:05London Heathrow
42h 45m
2 stops
EZE11:50Buenos Aires Ministro Pistarini
1 Apr
EZE13:30Buenos Aires Ministro Pistarini
22h 55m
2 stops
LHR16:25London Heathrow
£800
SWISS
16 Mar
LHR20:05London Heathrow
42h 45m
2 stops
EZE11:50Buenos Aires Ministro Pistarini
1 Apr
EZE13:30Buenos Aires Ministro Pistarini
22h 55m
2 stops
LHR16:25London Heathrow
£801
SWISS
5 May
LHR17:15London Heathrow
21h 35m
2 stops
EZE10:50Buenos Aires Ministro Pistarini
27 May
EZE13:30Buenos Aires Ministro Pistarini
22h 55m
2 stops
LHR16:25London Heathrow
£813

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 4 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

Mon 1/6

22:05-05:40

1 stop35h 35m

Buenos Aires Jorge Newbery

Tue 30/6

07:00-15:35

1 stop28h 35m

£779

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Mon 9/2

10:00-07:20

1 stop24h 20m

Buenos Aires Ministro Pistarini

Tue 24/2

22:05-07:30

1 stop30h 25m

£781

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Mon 1/6

22:05-05:40

1 stop35h 35m

Buenos Aires Jorge Newbery

Mon 22/6

07:00-15:35

1 stop28h 35m

£782

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Mon 2/3

12:05-07:20

1 stop22h 15m

Buenos Aires Ministro Pistarini

Sun 8/3

21:05-07:30

1 stop31h 25m

£782

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Tue 14/4

08:45-14:30

3 stops33h 45m

Buenos Aires Ministro Pistarini

Mon 11/5

16:35-06:35

2 stops34h 00m

£783

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Wed 11/3

21:40-05:40

1 stop35h 00m

Buenos Aires Jorge Newbery

Mon 30/3

07:00-15:35

1 stop28h 35m

£783

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Mon 9/3

22:35-22:25

2 stops50h 50m

Buenos Aires Ministro Pistarini

Tue 17/3

23:55-14:10

2 stops35h 15m

£783

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Mon 13/4

06:55-08:00

2 stops29h 05m

Buenos Aires Ministro Pistarini

Sun 19/4

21:00-07:40

1 stop30h 40m

£785

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Thu 26/2

12:05-09:20

1 stop24h 15m

Buenos Aires Ministro Pistarini

Thu 19/3

22:55-07:30

1 stop29h 35m

£785

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Mon 9/3

21:40-05:40

1 stop35h 00m

Buenos Aires Jorge Newbery

Wed 25/3

07:00-14:35

1 stop28h 35m

£787

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, May 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 £886. If you don’t want to visit Buenos Aires in May, then you should wait until February to fly from London Heathrow Airport, when ticket prices are also cheap, with an average price of £888.

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 £960. 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 £1,117.

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 £1,005 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 £845 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 26% 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 45% 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

£903

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 £903
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 £687Free CancellationRating
6.5
2,499 reviews
Search Avianca flights
IberiaPriceFrom £707Free CancellationRating
7.0
3,104 reviews
Search Iberia flights
FinnairPriceFrom £740Free CancellationRating
7.6
1,357 reviews
Search Finnair flights
Air FrancePriceFrom £753Free CancellationRating
7.4
1,532 reviews
Search Air France flights
British AirwaysPriceFrom £813Free CancellationRating
6.7
7,716 reviews
Search British Airways flights
American AirlinesPriceFrom £851Free CancellationRating
7.2
11,223 reviews
Search American Airlines flights
LufthansaPriceFrom £903Free CancellationRating
6.8
7,759 reviews
Search Lufthansa flights
LATAM AirlinesPriceFrom £903Free CancellationRating
7.5
1,918 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 1,357 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 £740 (round-trip), much lower than the average airfare cost of £1,070 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 £707 round-trip, depending on your selected dates, with average Iberia deals seen on momondo around £888. Iberia operates 7 flights to Buenos Aires from London Heathrow Airport in an average week. Users have rated it 7.0/10 across 3,104 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