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Cheap flights from London Heathrow Airport to Buenos Aires from £435

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/9. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — BUE
9 Jul — 16 Jul1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Heathrow to Buenos Aires

Enter your travel dates to find the best prices.

Cheapest flights from Heathrow to Buenos Aires
Explore the most affordable flight options available from Heathrow to Buenos Aires. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 9 June 2026.

Wed 1/720:00
LHR
-
EZE
1 stop24h 05m
British Airways
Wed 29/712:25
EZE
-
LHR
1 stop15h 45m
British Airways
Deal found 4/6£872
Sun 28/611:30
LHR
-
EZE
1 stop16h 00m
Iberia
Mon 10/813:00
EZE
-
LHR
1 stop15h 25m
Iberia
Deal found 6/6£877
Fri 13/1115:00
LHR
-
EZE
2 stops27h 10m
Air Canada
Wed 2/1216:45
EZE
-
LHR
2 stops34h 45m
Air Canada
Deal found 6/6£878
Tue 13/1022:05
LHR
-
AEP
1 stop35h 35m
Avianca
Tue 20/1007:00
AEP
-
LHR
1 stop28h 35m
Avianca
Deal found 7/6£878
Sat 28/1118:00
LHR
-
EZE
2 stops24h 10m
Air Canada
Wed 9/1216:45
EZE
-
LHR
2 stops39h 35m
Air Canada
Deal found 8/6£879
Thu 12/1115:00
LHR
-
EZE
2 stops27h 10m
Air Canada
Fri 20/1116:45
EZE
-
LHR
2 stops36h 45m
Air Canada
Deal found 4/6£880
Sat 14/1118:00
LHR
-
EZE
2 stops24h 10m
Air Canada
Wed 9/1216:45
EZE
-
LHR
2 stops39h 35m
Air Canada
Deal found 5/6£881
Sat 28/1120:50
LHR
-
EZE
1 stop24h 05m
Multiple Airlines
Wed 9/1219:45
EZE
-
LHR
1 stop21h 20m
Multiple Airlines
Deal found 8/6£881
Fri 13/1113:00
LHR
-
EZE
3 stops29h 10m
Air Canada
Mon 16/1116:45
EZE
-
LHR
2 stops36h 45m
Air Canada
Deal found 4/6£882
Wed 1/713:30
LHR
-
EZE
1 stop20h 55m
Multiple Airlines
Wed 29/713:30
EZE
-
LHR
2 stops24h 20m
Multiple Airlines
Deal found 8/6£884
Tue 22/906:00
LHR
-
AEP
2 stops24h 20m
Multiple Airlines
Sun 4/1014:30
AEP
-
LHR
2 stops28h 25m
Multiple Airlines
Deal found 5/6£884
Tue 3/1121:40
LHR
-
AEP
1 stop35h 00m
Multiple Airlines
Thu 12/1105:45
AEP
-
LHR
3 stops29h 20m
Multiple Airlines
Deal found 5/6£887

Find flight deals from Heathrow to Buenos Aires

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Buenos Aires (BUE). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 9 June 2026.

Round-trip from

£872

One-way from

£435

Popular in

December

Cheapest in

April

Average price

£945

Good round-trip deal

£1,202 or less
British Airways
  • British Airways
  • 1/7-29/7
  • 2 total stops
  • 39h 50m total
  • London to Buenos Aires
Search Deals
Avianca
  • Avianca
  • 9/9
  • 1 total stop
  • 21h 35m total
  • London to Buenos Aires
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (£63 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£27 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 2026
Search Deals
Price to beat on a round-trip flight from London Heathrow to Buenos Aires (BUE).
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Heathrow 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, Cheapflights users made 858,174 searches. Data last updated 9 June 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

Cheapest return flight

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Wed 1/7

20:00-16:05

1 stop24h 05m

Buenos Aires Ministro Pistarini

Wed 29/7

12:25-08:10

1 stop15h 45m

£878

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Mon 16/11

09:40-10:55

2 stops28h 15m

Buenos Aires Ministro Pistarini

Tue 8/12

21:30-06:50

2 stops30h 20m

£938

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Sat 5/9

10:45-09:45

2 stops27h 00m

Buenos Aires Ministro Pistarini

Sat 26/9

20:10-09:15

2 stops33h 05m

£938

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Wed 11/11

06:20-10:55

2 stops31h 35m

Buenos Aires Ministro Pistarini

Wed 25/11

21:30-06:50

2 stops30h 20m

£949

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Fri 13/11

06:35-07:20

2 stops27h 45m

Buenos Aires Ministro Pistarini

Tue 1/12

23:55-05:55

2 stops27h 00m

£962

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Sun 15/11

12:05-09:20

1 stop24h 15m

Buenos Aires Ministro Pistarini

Thu 3/12

23:55-05:55

2 stops27h 00m

£967

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Wed 9/9

11:25-08:00

2 stops24h 35m

Buenos Aires Ministro Pistarini

Sun 20/9

21:00-05:55

2 stops28h 55m

£971

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Mon 5/10

17:15-10:50

3 stops45h 35m

Buenos Aires Ministro Pistarini

Wed 14/10

13:30-21:30

3 stops28h 00m

£1,007

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Wed 1/7

13:30-06:25

1 stop20h 55m

Buenos Aires Ministro Pistarini

Wed 22/7

13:30-13:00

2 stops19h 30m

£1,018

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Thu 9/7

13:30-06:25

1 stop20h 55m

Buenos Aires Ministro Pistarini

Sat 11/7

13:30-16:25

2 stops22h 55m

£1,034

Flights are sorted by cheapest return flights first.

Deals found on 8/6

Showing 1-10 of 43 resultsSorted by cheapest first
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Best time to book a flight from Heathrow to Buenos Aires

Have a flexible travel schedule? Discover the best time to fly to Buenos Aires from Heathrow with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from London Heathrow Airport to Buenos Aires

What is the cheapest month to book a flight from London Heathrow Airport to Buenos Aires?

Currently, July is the cheapest month in which you can book a flight from London Heathrow Airport to Buenos Aires (average of £118). Flying from London Heathrow Airport to Buenos Aires in August is currently the most expensive (average of £753). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from LHR to BUE?

Find hourly flight availability from Heathrow to Buenos Aires. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 9 June 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London Heathrow Airport to Buenos Aires as you normally would.

Weekly flight availability from London Heathrow Airport to Buenos Aires

Explore weekly flight availability from Heathrow to Buenos Aires. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 9 June 2026.

The most flights from LHR to BUE are scheduled on a Monday (3 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (3 on average).

How much does it cost for a return flight from London Heathrow Airport to Buenos Aires?

What’s the top stopover airport for flights from London Heathrow Airport to Buenos Aires?

Share of one-stop return flights from London Heathrow Airport to Buenos Aires chosen by Cheapflights users in the past 12 months, using the same stopover each way.

Frankfurt am Main (FRA) – chosen by Cheapflights users on 28% of one-stop itineraries from London Heathrow Airport to Buenos Aires on Cheapflights.

What’s the cheapest stopover airport for flights from London Heathrow Airport to Buenos Aires?

Average return fare for one-stop flights from London Heathrow Airport to Buenos Aires, chosen by Cheapflights users in the past 12 months, with the same stopover each way.

Houston (IAH) is the most affordable one-stop option, with an average return flight price of £790.

What’s the fastest stopover option from London Heathrow Airport to Buenos Aires?

Shortest average travel time for one-stop one-way flights from London Heathrow Airport to Buenos Aires, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.

Flights via Madrid (MAD) have the shortest average one-way travel time for one-stop routes: 16h 25m.

Which airport typically offers the quickest stopover for flights from London Heathrow Airport to Buenos Aires?

Average stopover duration for one-stop one-way flights from London Heathrow Airport to Buenos Aires, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Frankfurt am Main (FRA) offer the fastest connection on this route, with an average stopover time of 1h 11m.

How far ahead should I book a flight from London Heathrow Airport to Buenos Aires?

Booking 39 days in advance of your planned departure date is, on average, the best time to get cheap flights from London Heathrow Airport to Buenos Aires. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

Reviews of airlines servicing Buenos Aires

Get insights into the airlines that provide service to Buenos Aires. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Buenos Aires. Reviews last updated 9 June 2026.
Read through reviews of airlines operating flights from London Heathrow Airport to Buenos Aires, such as LATAM Airlines,Iberia, andLufthansa. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
LATAM Airlines
7.4
Good
1,926 reviews
Check prices

Food

6.7

Entertainment

7.0

Boarding

7.5

Comfort

7.3

Crew

8.0

Overall

7.4

Reviews

1 / 20
6.0
Good

Juan,Apr 2026

BOG - CLO

Very old aircraft and it was very dirty in the seats and floor
LATAM Airlines
7.4
Good
1,926 reviews
LATAM Airlines
7.4
Good
1,926 reviews
Check prices

Food

6.7

Entertainment

7.0

Boarding

7.5

Comfort

7.3

Crew

8.0

Overall

7.4

Reviews

1 / 20
6.0
Good

Juan,Apr 2026

BOG - CLO

Very old aircraft and it was very dirty in the seats and floor
Iberia
7.0
Good
3,230 reviews
LATAM Airlines
7.4
Good
1,926 reviews
Check prices

Food

6.7

Entertainment

7.0

Boarding

7.5

Comfort

7.3

Crew

8.0

Overall

7.4

Reviews

1 / 20
6.0
Good

Juan,Apr 2026

BOG - CLO

Very old aircraft and it was very dirty in the seats and floor
Lufthansa
6.8
Okay
8,049 reviews
LATAM Airlines
7.4
Good
1,926 reviews
Check prices

Food

6.7

Entertainment

7.0

Boarding

7.5

Comfort

7.3

Crew

8.0

Overall

7.4

Reviews

1 / 20
6.0
Good

Juan,Apr 2026

BOG - CLO

Very old aircraft and it was very dirty in the seats and floor
British Airways
6.7
Okay
8,031 reviews
LATAM Airlines
7.4
Good
1,926 reviews
Check prices

Food

6.7

Entertainment

7.0

Boarding

7.5

Comfort

7.3

Crew

8.0

Overall

7.4

Reviews

1 / 20
6.0
Good

Juan,Apr 2026

BOG - CLO

Very old aircraft and it was very dirty in the seats and floor
Avianca
6.5
Okay
2,533 reviews
LATAM Airlines
7.4
Good
1,926 reviews
Check prices

Food

6.7

Entertainment

7.0

Boarding

7.5

Comfort

7.3

Crew

8.0

Overall

7.4

Reviews

1 / 20
6.0
Good

Juan,Apr 2026

BOG - CLO

Very old aircraft and it was very dirty in the seats and floor

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Buenos Aires. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from London Heathrow Airport to Buenos Aires?

    A quick flight from London Heathrow Airport to Buenos Aires can take about 24h 05m. British Airways provides one of the quickest options available for as low as £878. London Heathrow Airport and Buenos Aires are separated by a distance of 6915 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What are the cheapest airlines flying from London Heathrow Airport to Buenos Aires round-trip?

    Our cheapest airline available from London Heathrow Airport to Buenos Aires is Avianca. Our recent data shows that you can find tickets from as low as £690 on this airline. Additional options worth looking into are Iberia and Air France, starting at £737 and £752 round-trip. Avianca is 32% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest flights from London Heathrow Airport to Buenos Aires?

    Looking at all options, your cheapest flight can be booked for £1,019. While the most popular route (London Heathrow - Buenos Aires Ministro Pistarini) can be booked for £726 on average, our data indicates £1,261 when flying from London Heathrow Airport to Buenos Aires.

  • Can I find deals for flights from Heathrow to Buenos Aires that include hotel bookings?

    Yes. In addition to deals on Heathrow to Buenos Aires flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Heathrow to Buenos Aires?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Buenos Aires.

  • Can I find deals for business class flights from Heathrow to Buenos Aires?

    Yes. Cheapflights offers flight deals from Heathrow to Buenos Aires by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from London Heathrow Airport to Buenos Aires?

    Currently, July is the cheapest month in which you can book a flight from London Heathrow Airport to Buenos Aires (average of £118). Flying from London Heathrow Airport to Buenos Aires in August is currently the most expensive (average of £753). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 8 airlines flying from Heathrow to Buenos Aires

Discover the top 8 airlines that operate flights from Heathrow to Buenos Aires. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 9 June 2026.
AirlineCheapestAverageFlexibilityOn-time
AviancaCheapest£690Average£800FlexibilityNo cancel feeOn-time71%
Search Avianca flights
IberiaCheapest£737Average£1,005FlexibilityNo cancel feeOn-time77%
Search Iberia flights
Air FranceCheapest£752Average£1,390FlexibilityNo cancel feeOn-time77%
Search Air France flights
LATAM AirlinesCheapest£850Average£1,014FlexibilityNo cancel feeOn-time81%
Search LATAM Airlines flights
American AirlinesCheapest£873Average£890FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
British AirwaysCheapest£880Average£1,063FlexibilityNo cancel feeOn-time70%
Search British Airways flights
LufthansaCheapest£945Average£1,237FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
FinnairCheapest£1,080Average£1,097FlexibilityNo cancel feeOn-time76%
Search Finnair flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Heathrow to Buenos Aires?

When you search for this flight from Heathrow to Buenos Aires, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Heathrow to Buenos Aires?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Heathrow to Buenos Aires.

Can Cheapflights find flights from Heathrow to Buenos Aires with no change fees?

Yes, we can. To see specific flights from Heathrow to Buenos Aires with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Heathrow to Buenos Aires become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Buenos Aires from Heathrow today and book when prices fit your budget.

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