Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from London Heathrow Airport to Buenos Aires from £412

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 8/6. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — BUE
17 Jun — 24 Jun1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from London Heathrow to Buenos Aires are usually found in April or May, booked 82 days in advance, depart on a Monday or Sunday and return on a Monday

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 18 May 2026.

Sun 8/1121:40
LHR
-
EZE
1 stop21h 10m
Avianca
Fri 27/1101:40
EZE
-
LHR
1 stop33h 55m
Avianca
Deal found 13/5£787
Tue 16/618:40
LHR
-
EZE
2 stops20h 10m
Multiple Airlines
Fri 26/616:35
EZE
-
LHR
1 stop25h 35m
Multiple Airlines
Deal found 16/5£806
Tue 16/622:05
LHR
-
EZE
1 stop21h 35m
Avianca
Tue 23/616:50
EZE
-
LHR
1 stop18h 45m
Avianca
Deal found 17/5£807
Mon 21/922:05
LHR
-
AEP
1 stop35h 35m
Avianca
Sun 4/1007:00
AEP
-
LHR
1 stop28h 35m
Avianca
Deal found 15/5£809
Mon 15/620:05
LHR
-
EZE
2 stops42h 45m
SWISS
Wed 24/613:30
EZE
-
LHR
2 stops24h 20m
SWISS
Deal found 17/5£810
Wed 16/922:05
LHR
-
AEP
1 stop35h 35m
Avianca
Wed 14/1007:00
AEP
-
LHR
1 stop28h 35m
Avianca
Deal found 13/5£813
Tue 23/622:05
LHR
-
AEP
1 stop35h 35m
Avianca
Mon 29/607:00
AEP
-
LHR
1 stop28h 35m
Avianca
Deal found 14/5£815
Tue 16/622:05
LHR
-
AEP
1 stop35h 35m
Avianca
Sat 27/607:00
AEP
-
LHR
1 stop28h 35m
Avianca
Deal found 17/5£816
Mon 25/522:05
LHR
-
AEP
1 stop35h 35m
Avianca
Mon 1/607:00
AEP
-
LHR
1 stop28h 35m
Avianca
Deal found 13/5£819
Mon 18/522:05
LHR
-
AEP
1 stop35h 35m
Avianca
Tue 2/607:00
AEP
-
LHR
1 stop28h 35m
Avianca
Deal found 17/5£824
Mon 18/522:05
LHR
-
EZE
1 stop21h 35m
Avianca
Mon 25/516:50
EZE
-
LHR
1 stop18h 45m
Avianca
Deal found 18/5£828
Sat 24/1022:05
LHR
-
AEP
1 stop35h 35m
Avianca
Sun 8/1107:00
AEP
-
LHR
1 stop28h 35m
Avianca
Deal found 18/5£830

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 18 May 2026.

Round-trip from

£787

One-way from

£412

Popular in

December

Cheapest in

April

Average price

£945

Good round-trip deal

£1,203 or less
Avianca
  • Avianca
  • 8/11-27/11
  • 2 total stops
  • 55h 05m total
  • London to Buenos Aires
Search Deals
Avianca
  • Avianca
  • 8/6
  • 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 May 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 18 May 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

Mon 15/6

20:05-10:50

2 stops42h 45m

Buenos Aires Ministro Pistarini

Wed 24/6

13:30-17:50

2 stops24h 20m

£885

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Wed 24/6

08:30-06:25

1 stop25h 55m

Buenos Aires Ministro Pistarini

Wed 22/7

16:35-17:40

1 stop21h 05m

£934

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Sat 5/9

09:20-09:45

1 stop28h 25m

Buenos Aires Ministro Pistarini

Sat 26/9

20:10-06:25

1 stop30h 15m

£937

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Sat 5/9

15:15-09:45

1 stop22h 30m

Buenos Aires Ministro Pistarini

Fri 2/10

20:10-06:20

2 stops30h 10m

£938

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Fri 11/9

13:40-08:00

1 stop22h 20m

Buenos Aires Ministro Pistarini

Fri 25/9

21:00-10:40

2 stops33h 40m

£966

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Mon 22/6

16:30-19:55

1 stop31h 25m

Buenos Aires Ministro Pistarini

Fri 24/7

13:00-08:25

1 stop15h 25m

£969

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Wed 24/6

22:05-05:40

1 stop35h 35m

Buenos Aires Jorge Newbery

Sun 26/7

07:00-15:35

1 stop28h 35m

£971

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Thu 10/9

10:00-08:00

1 stop26h 00m

Buenos Aires Ministro Pistarini

Fri 2/10

21:00-05:55

2 stops28h 55m

£980

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Sun 31/5

06:30-09:45

2 stops31h 15m

Buenos Aires Ministro Pistarini

Wed 10/6

20:10-09:00

2 stops32h 50m

£985
Fastest return journey

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Sat 5/9

14:40-10:30

2 stops23h 50m

Buenos Aires Jorge Newbery

Thu 1/10

10:20-06:25

1 stop16h 05m

£1,030

Flights are sorted by cheapest return flights first.

Deals found on 16/5

Showing 1-10 of 39 resultsSorted by cheapest first
1
2
3
4

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

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.

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

Currently, March is the cheapest month in which you can book a flight from London Heathrow Airport to Buenos Aires (average of £173). Flying from London Heathrow Airport to Buenos Aires in July is currently the most expensive (average of £820). 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 18 May 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 18 May 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 £791.

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.

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 18 May 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
1,923 reviews
Check prices

Food

6.7

Overall

7.4

Comfort

7.3

Crew

8.0

Entertainment

7.0

Boarding

7.5

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
1,923 reviews
LATAM Airlines
7.4
Good
1,923 reviews
Check prices

Food

6.7

Overall

7.4

Comfort

7.3

Crew

8.0

Entertainment

7.0

Boarding

7.5

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
3,220 reviews
LATAM Airlines
7.4
Good
1,923 reviews
Check prices

Food

6.7

Overall

7.4

Comfort

7.3

Crew

8.0

Entertainment

7.0

Boarding

7.5

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
8,010 reviews
LATAM Airlines
7.4
Good
1,923 reviews
Check prices

Food

6.7

Overall

7.4

Comfort

7.3

Crew

8.0

Entertainment

7.0

Boarding

7.5

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
7,986 reviews
LATAM Airlines
7.4
Good
1,923 reviews
Check prices

Food

6.7

Overall

7.4

Comfort

7.3

Crew

8.0

Entertainment

7.0

Boarding

7.5

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
2,528 reviews
LATAM Airlines
7.4
Good
1,923 reviews
Check prices

Food

6.7

Overall

7.4

Comfort

7.3

Crew

8.0

Entertainment

7.0

Boarding

7.5

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 25h 55m. SWISS provides one of the quickest options available for as low as £934. 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 £691 on this airline. Additional options worth looking into are Iberia and Air France, starting at £737 and £753 round-trip. Avianca is 33% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from London Heathrow Airport to Buenos Aires one-way?

    £377 is the cheapest one-way deal found within the past few days, from Avianca. You may also be able to find cheap deals on LATAM Airlines and Iberia, with prices starting from £603 and £683, respectively.

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

    Looking at all options, your cheapest flight can be booked for £1,100. While the most popular route (London Heathrow - Buenos Aires Ministro Pistarini) can be booked for £849 on average, our data indicates £1,283 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, March is the cheapest month in which you can book a flight from London Heathrow Airport to Buenos Aires (average of £173). Flying from London Heathrow Airport to Buenos Aires in July is currently the most expensive (average of £820). 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 18 May 2026.
AirlineCheapestAverageFlexibilityOn-time
AviancaCheapest£691Average£801FlexibilityNo cancel feeOn-time71%
Search Avianca flights
IberiaCheapest£737Average£1,007FlexibilityNo cancel feeOn-time77%
Search Iberia flights
Air FranceCheapest£753Average£1,391FlexibilityNo cancel feeOn-time77%
Search Air France flights
LATAM AirlinesCheapest£851Average£1,015FlexibilityNo cancel feeOn-time81%
Search LATAM Airlines flights
American AirlinesCheapest£874Average£891FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
British AirwaysCheapest£881Average£1,074FlexibilityNo cancel feeOn-time70%
Search British Airways flights
LufthansaCheapest£927Average£1,234FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
FinnairCheapest£1,081Average£1,099FlexibilityNo 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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.