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Cheap flights from London Heathrow Airport to Buenos Aires from £460

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 30/10. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — BUE
20 Nov — 27 Nov1
1 adult
1 adult, Economy

Cheapflights Tip: The best prices from London Heathrow to Buenos Aires are usually found in March or February, booked 90 days in advance, depart on a Monday or Tuesday and return on a Monday

Cheap 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 21 October 2025.

Round-trip from

£727

One-way from

£460

Popular in

December

Cheapest in

March

Average price

£914

Good round-trip deal

£1,447 or less
Avianca
  • Avianca
  • 15/3-31/3
  • 2 total stops
  • 40h 00m total
  • London to Buenos Aires
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United Airlines
  • United Airlines
  • 30/10
  • 2 total stops
  • 47h 45m total
  • London to Buenos Aires
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (£56 potential increase over avg. return price).
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Cheapest flight prices on average. 3% potential price decrease (£26 potential savings vs. average return price).
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Average for round-trip flights in October 2025
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Price to beat on a round-trip flight from London Heathrow to Buenos Aires (BUE).
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Find 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 21 October 2025.

Thu 27/1111:30LHR - EZE
1 stop23h 25mLufthansa
Thu 11/1217:45EZE - LHR
1 stop19h 05mLufthansa
Deal found 20/10£737
Sun 16/1121:40LHR - EZE
1 stop35h 10mAvianca
Tue 2/1207:30EZE - LHR
1 stop28h 05mAvianca
Deal found 19/10£751
Tue 18/1121:40LHR - EZE
1 stop35h 10mAvianca
Fri 12/1216:55EZE - LHR
1 stop18h 40mAvianca
Deal found 19/10£753
Wed 3/1209:55LHR - EZE
2 stops25h 50mMultiple Airlines
Tue 9/1213:50EZE - LHR
2 stops25h 10mMultiple Airlines
Deal found 20/10£762
Wed 3/1209:55LHR - EZE
2 stops25h 50mMultiple Airlines
Wed 10/1213:50EZE - LHR
2 stops25h 10mMultiple Airlines
Deal found 19/10£770
Tue 18/1121:40LHR - EZE
1 stop21h 10mAvianca
Tue 9/1216:55EZE - LHR
1 stop18h 40mAvianca
Deal found 19/10£772
Mon 10/1107:40LHR - EZE
2 stops28h 40mUnited Airlines
Mon 17/1123:55EZE - LHR
1 stop31h 20mUnited Airlines
Deal found 19/10£775
Sat 15/1116:40LHR - EZE
2 stops41h 40mUnited Airlines
Sun 23/1123:55EZE - LHR
1 stop28h 35mUnited Airlines
Deal found 19/10£782
Wed 3/1206:20LHR - EZE
1 stop17h 00mAir France
Wed 10/1222:40EZE - LHR
1 stop16h 40mAir France
Deal found 19/10£783
Tue 11/1110:00LHR - EZE
1 stop26h 20mUnited Airlines
Mon 17/1123:55EZE - LHR
2 stops30h 45mUnited Airlines
Deal found 19/10£785
Fri 7/1112:05LHR - EZE
1 stop22h 15mUnited Airlines
Wed 12/1123:55EZE - LHR
2 stops32h 10mUnited Airlines
Deal found 20/10£785
Tue 18/1121:40LHR - AEP
1 stop35h 00mAvianca
Tue 9/1207:00AEP - LHR
1 stop28h 35mAvianca
Deal found 19/10£790

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 21 October 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Buenos Aires that are best for you.

Fly from

Heathrow

Fly to

Buenos Aires

Route

Depart

Return

Price

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Sun 12/4

22:05-05:40

1 stop35h 35m

Buenos Aires Jorge Newbery

Wed 15/4

07:00-15:35

1 stop28h 35m

£759

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Sun 12/4

22:05-05:40

1 stop35h 35m

Buenos Aires Jorge Newbery

Thu 16/4

07:00-15:35

1 stop28h 35m

£759

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Wed 8/4

22:05-05:40

1 stop35h 35m

Buenos Aires Jorge Newbery

Thu 16/4

07:00-15:35

1 stop28h 35m

£759

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Thu 9/4

22:05-05:40

1 stop35h 35m

Buenos Aires Jorge Newbery

Thu 16/4

07:00-15:35

1 stop28h 35m

£759

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Wed 8/4

22:05-05:40

1 stop35h 35m

Buenos Aires Jorge Newbery

Wed 15/4

07:00-15:35

1 stop28h 35m

£759

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Thu 9/4

22:05-00:10

1 stop30h 05m

Buenos Aires Ministro Pistarini

Thu 16/4

16:45-15:35

1 stop18h 50m

£765

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Mon 10/11

07:40-09:20

2 stops28h 40m

Buenos Aires Ministro Pistarini

Mon 17/11

23:55-09:40

2 stops30h 45m

£775

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Sat 15/11

16:40-07:20

2 stops41h 40m

Buenos Aires Ministro Pistarini

Sun 23/11

23:55-07:30

1 stop28h 35m

£782

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Wed 5/11

12:05-07:20

1 stop22h 15m

Buenos Aires Ministro Pistarini

Sat 22/11

23:55-07:30

1 stop28h 35m

£785

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Tue 11/11

12:05-09:20

1 stop24h 15m

Buenos Aires Ministro Pistarini

Mon 24/11

23:55-10:15

1 stop31h 20m

£785

Flights are sorted by cheapest return flights first.

Deals found on 20/10

Showing 1-10 of 37 results
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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

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

Use this chart to determine the optimal time to book a return flight from Heathrow to Buenos Aires. Price data was last updated on 17 October 2025.

Booking 90 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 £573). Flying from London Heathrow Airport to Buenos Aires in July is currently the most expensive (average of £890). 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 21 October 2025.

It’s typically best to fly out from London Heathrow Airport to Buenos Aires in the morning. Doing so could potentially save you 25% on the flight price compared to flying in the evening, which is usually more expensive.

What is the cheapest day to fly from London Heathrow Airport to Buenos Aires?

Use this chart to determine the cheapest time to fly return from Heathrow to Buenos Aires. Price data was last updated on 16 December 2024.

Travellers seeking maximum savings on their London Heathrow Airport to Buenos Aires flight should consider departing on Sunday afternoons when fares are most often at their lowest. Friday at midday flights should be avoided if possible as fares are typically the most expensive at this time.

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 23% 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.

Toronto (YYZ) is the most affordable one-stop option, with an average return flight price of £740.

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 Amsterdam (AMS) have the shortest average one-way travel time for one-stop routes: 16h 14m.

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 Amsterdam (AMS) offer the fastest connection on this route, with an average stopover time of 1h 28m.

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 21 October 2025.
Read through reviews of airlines operating flights from London Heathrow Airport to Buenos Aires, such as Finnair, LATAM Airlines, andIberia. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Finnair
7.6
Good
1,333 reviews
Check prices

Boarding

7.6

Food

6.7

Comfort

7.4

Entertainment

6.9

Overall

7.6

Crew

8.1

Reviews

1 / 20
6.0
Good

Matt,May 2025

LHR - MIA

Difficult to say what I liked, cabin crew very miserable, looked like they were sick of the job and it was their 50th flight if the day, long wait between drinks and food was somewhat very budget. We did travel in economy but with such a long flight you'd expect this type of service with Ryanair for a two/three hour flight to benidorm, not 8 hours over the Altantic.. entertainment was limited with films and difficult to hear even with headphones on. I think the pilot spoke once and I couldn't hear him over the noise in the cabin. I'd say to say you get what you pay for but my opinion I've flown with a much better airlines. Sorry...you dud ask :(
Finnair
7.6
Good
1,333 reviews
Finnair
7.6
Good
1,333 reviews
Check prices

Boarding

7.6

Food

6.7

Comfort

7.4

Entertainment

6.9

Overall

7.6

Crew

8.1

Reviews

1 / 20
6.0
Good

Matt,May 2025

LHR - MIA

Difficult to say what I liked, cabin crew very miserable, looked like they were sick of the job and it was their 50th flight if the day, long wait between drinks and food was somewhat very budget. We did travel in economy but with such a long flight you'd expect this type of service with Ryanair for a two/three hour flight to benidorm, not 8 hours over the Altantic.. entertainment was limited with films and difficult to hear even with headphones on. I think the pilot spoke once and I couldn't hear him over the noise in the cabin. I'd say to say you get what you pay for but my opinion I've flown with a much better airlines. Sorry...you dud ask :(
LATAM Airlines
7.5
Good
1,868 reviews
Finnair
7.6
Good
1,333 reviews
Check prices

Boarding

7.6

Food

6.7

Comfort

7.4

Entertainment

6.9

Overall

7.6

Crew

8.1

Reviews

1 / 20
6.0
Good

Matt,May 2025

LHR - MIA

Difficult to say what I liked, cabin crew very miserable, looked like they were sick of the job and it was their 50th flight if the day, long wait between drinks and food was somewhat very budget. We did travel in economy but with such a long flight you'd expect this type of service with Ryanair for a two/three hour flight to benidorm, not 8 hours over the Altantic.. entertainment was limited with films and difficult to hear even with headphones on. I think the pilot spoke once and I couldn't hear him over the noise in the cabin. I'd say to say you get what you pay for but my opinion I've flown with a much better airlines. Sorry...you dud ask :(
Iberia
7.0
Good
2,996 reviews
Finnair
7.6
Good
1,333 reviews
Check prices

Boarding

7.6

Food

6.7

Comfort

7.4

Entertainment

6.9

Overall

7.6

Crew

8.1

Reviews

1 / 20
6.0
Good

Matt,May 2025

LHR - MIA

Difficult to say what I liked, cabin crew very miserable, looked like they were sick of the job and it was their 50th flight if the day, long wait between drinks and food was somewhat very budget. We did travel in economy but with such a long flight you'd expect this type of service with Ryanair for a two/three hour flight to benidorm, not 8 hours over the Altantic.. entertainment was limited with films and difficult to hear even with headphones on. I think the pilot spoke once and I couldn't hear him over the noise in the cabin. I'd say to say you get what you pay for but my opinion I've flown with a much better airlines. Sorry...you dud ask :(
Lufthansa
6.8
Okay
7,506 reviews
Finnair
7.6
Good
1,333 reviews
Check prices

Boarding

7.6

Food

6.7

Comfort

7.4

Entertainment

6.9

Overall

7.6

Crew

8.1

Reviews

1 / 20
6.0
Good

Matt,May 2025

LHR - MIA

Difficult to say what I liked, cabin crew very miserable, looked like they were sick of the job and it was their 50th flight if the day, long wait between drinks and food was somewhat very budget. We did travel in economy but with such a long flight you'd expect this type of service with Ryanair for a two/three hour flight to benidorm, not 8 hours over the Altantic.. entertainment was limited with films and difficult to hear even with headphones on. I think the pilot spoke once and I couldn't hear him over the noise in the cabin. I'd say to say you get what you pay for but my opinion I've flown with a much better airlines. Sorry...you dud ask :(
British Airways
6.7
Okay
7,461 reviews
Finnair
7.6
Good
1,333 reviews
Check prices

Boarding

7.6

Food

6.7

Comfort

7.4

Entertainment

6.9

Overall

7.6

Crew

8.1

Reviews

1 / 20
6.0
Good

Matt,May 2025

LHR - MIA

Difficult to say what I liked, cabin crew very miserable, looked like they were sick of the job and it was their 50th flight if the day, long wait between drinks and food was somewhat very budget. We did travel in economy but with such a long flight you'd expect this type of service with Ryanair for a two/three hour flight to benidorm, not 8 hours over the Altantic.. entertainment was limited with films and difficult to hear even with headphones on. I think the pilot spoke once and I couldn't hear him over the noise in the cabin. I'd say to say you get what you pay for but my opinion I've flown with a much better airlines. Sorry...you dud ask :(

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 28h 40m. Avianca provides one of the quickest options available for as low as £775. 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 Air France. Our recent data shows that you can find tickets from as low as £446 on this airline. Additional options worth looking into are Avianca and Iberia, starting at £716 and £724 round-trip. Air France is 54% 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 £932. While the most popular route (London Heathrow - Buenos Aires Ministro Pistarini) can be booked for £737 on average, our data indicates £1,978 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 £573). Flying from London Heathrow Airport to Buenos Aires in July is currently the most expensive (average of £890). 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

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Top 9 airlines flying from Heathrow to Buenos Aires

Discover the top 9 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 21 October 2025.
AirlineCheapestAverageFlexibilityOn-time
Air FranceCheapest£446Average£1,132FlexibilityNo cancel feeOn-time77%
Search Air France flights
AviancaCheapest£716Average£798FlexibilityNo cancel feeOn-time71%
Search Avianca flights
IberiaCheapest£724Average£1,035FlexibilityNo cancel feeOn-time77%
Search Iberia flights
FinnairCheapest£737Average£1,080FlexibilityNo cancel feeOn-time76%
Search Finnair flights
British AirwaysCheapest£799Average£1,077FlexibilityNo cancel feeOn-time70%
Search British Airways flights
LufthansaCheapest£821Average£1,211FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
LATAM AirlinesCheapest£872Average£1,028FlexibilityNo cancel feeOn-time81%
Search LATAM Airlines flights
American AirlinesCheapest£876Average£1,159FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
KLMCheapest£1,024Average£1,366FlexibilityNo cancel feeOn-time75%
Search KLM flights

Fly with Cheapflights

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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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