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 23h 15m. United Airlines provides one of the quickest options available for as low as £780. 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 £439 on this airline. Additional options worth looking into are Air Canada and Avianca, starting at £634 and £696 round-trip. Air France is 54% cheaper than the average price of flights available within the next 90 days to this destination.

In terms of precipitation, rainfall in Buenos Aires ranges from 50.0 - 100.0 inches per month. January is typically the wettest month, when rainfall can reach 100.0 mm. June is typically the driest time to visit Buenos Aires when rainfall is around 50.0 mm.

If weather is an important factor for your trip to Buenos Aires, use this chart to help with planning. For those seeking warmer temperatures, January is the ideal time of year to visit, when temperatures reach an average of 25.0 C. Travellers hoping to avoid the cold should look outside of June, when temperatures are typically at their lowest (around 11.0 C).

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

Looking at all options, your cheapest flight can be booked for £1,061. While the most popular route (London Heathrow - Buenos Aires Ministro Pistarini) can be booked for £719 on average, our data indicates £1,874 when flying from London Heathrow Airport to Buenos Aires.

What are the most popular airlines that fly from London Heathrow Airport to Buenos Aires?

Before booking your flight from London Heathrow Airport to Buenos Aires check out the most popular airlines for this route: Air Canada, Air France or Avianca.

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.

£521+ Cheap Flights from London Heathrow Airport to Buenos Aires

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

Airfare is below average for this route at the moment. London Heathrow Airport to Buenos Aires flights typically cost between £815 and £1,008 in October. The cheapest return flight price found within the last 3 days was £700 on Avianca (28 Oct-15 Nov).

Cheapflights Tip: The best prices from London Heathrow to Buenos Aires are usually found in February or January, booked 63 days in advance, depart on a Monday or Tuesday and return on a Monday

Cheap flight deals from Heathrow to Buenos Aires

Round-trip from	£700
One-way from	£521
Popular in	December
Cheapest in	February
Average price	£893
Good round-trip deal	£1,279 or less

Avianca
28/10-15/11
2 total stops
53h 50m total
London to Buenos Aires

Search Deals

26/1
2 total stops
35h 48m total
London to Buenos Aires

Search Deals

Highest demand for flights based on searches. 6% potential increase in price (£48 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease (£23 potential savings vs. average return price).

Search Deals

Average for round-trip flights in September 2025

Search Deals

Price to beat on a round-trip flight from London Heathrow to Buenos Aires (BUE).

Search Deals

Find flight deals from Heathrow to Buenos Aires

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 17 September 2025.

Tue 28/1021:40LHR - EZE

1 stop35h 10mAvianca

Sat 15/1116:55EZE - LHR

1 stop18h 40mAvianca

Deal found 15/9£700

Thu 6/1121:40LHR - EZE

1 stop35h 10mAvianca

Sun 16/1101:40EZE - LHR

1 stop33h 55mAvianca

Deal found 15/9£710

Wed 19/1121:40LHR - EZE

1 stop21h 10mAvianca

Mon 9/316:55EZE - LHR

1 stop18h 40mAvianca

Deal found 15/9£711

Tue 11/1121:40LHR - EZE

1 stop21h 10mAvianca

Mon 17/1116:55EZE - LHR

1 stop18h 40mAvianca

Deal found 16/9£714

Mon 10/1121:40LHR - EZE

1 stop21h 10mAvianca

Thu 11/1207:35EZE - LHR

1 stop28h 00mAvianca

Deal found 15/9£716

Thu 13/1121:40LHR - EZE

1 stop35h 10mAvianca

Fri 28/1107:35EZE - LHR

1 stop28h 00mAvianca

Deal found 15/9£717

Wed 24/922:05LHR - EZE

1 stop21h 15mAvianca

Wed 1/1006:50EZE - LHR

1 stop28h 45mAvianca

Deal found 15/9£718

Wed 24/922:05LHR - EZE

1 stop21h 15mAvianca

Thu 23/1016:45EZE - LHR

1 stop18h 50mAvianca

Deal found 15/9£719

Mon 22/922:05LHR - EZE

1 stop21h 15mAvianca

Sun 5/1006:50EZE - LHR

1 stop28h 45mAvianca

Deal found 15/9£719

Thu 9/1022:05LHR - EZE

1 stop30h 05mAvianca

Thu 23/1001:40EZE - LHR

1 stop33h 55mAvianca

Deal found 15/9£723

Mon 17/1121:40LHR - EZE

1 stop35h 10mAvianca

Sat 6/1201:40EZE - LHR

1 stop33h 55mAvianca

Deal found 16/9£724

Mon 22/922:05LHR - AEP

1 stop35h 35mAvianca

Mon 29/907:00AEP - LHR

1 stop28h 35mAvianca

Deal found 15/9£762

Best flights from Heathrow to Buenos Aires
Discover carefully curated flight deals from Heathrow to Buenos Aires that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 17 September 2025.

Tue 28/1012:05LHR - EZE

1 stop23h 15mUnited Airlines

Mon 17/1123:55EZE - LHR

2 stops29h 30mUnited Airlines

Deal found 16/9£780

Tue 7/1010:50LHR - EZE

1 stop24h 45mBritish Airways

Thu 23/1012:15EZE - LHR

1 stop15h 40mBritish Airways

Deal found 16/9£823

Sat 8/1121:40LHR - AEP

1 stop35h 00mAvianca

Tue 11/1107:00AEP - LHR

1 stop28h 35mAvianca

Deal found 16/9£862

Tue 13/113:25LHR - AEP

2 stops30h 55mAir Canada

Tue 10/213:40AEP - LHR

2 stops37h 50mAir Canada

Deal found 16/9£922

Tue 14/1021:20LHR - AEP

1 stop18h 40mLATAM Airlines

Sat 25/1018:20AEP - LHR

1 stop16h 45mLATAM Airlines

Deal found 16/9£1,022

Wed 12/1120:05LHR - AEP

2 stops42h 35mSWISS

Mon 17/1114:55AEP - LHR

3 stops24h 45mSWISS

Deal found 16/9£1,112

Sat 1/1119:55LHR - AEP

2 stops28h 35mMultiple Airlines

Sat 8/1118:20AEP - LHR

2 stops20h 10mMultiple Airlines

Deal found 16/9£1,114

Sat 25/1016:40LHR - EZE

2 stops41h 40mUnited Airlines

Fri 14/1123:55EZE - LHR

2 stops30h 45mUnited Airlines

Deal found 16/9£780

Tue 7/1020:00LHR - EZE

1 stop24h 20mBritish Airways

Thu 6/1113:35EZE - LHR

1 stop16h 00mBritish Airways

Deal found 16/9£823

Sat 25/1016:40LHR - EZE

2 stops41h 40mUnited Airlines

Sun 16/1122:05EZE - LHR

1 stop30h 25mUnited Airlines

Deal found 16/9£780

Mon 1/1221:40LHR - AEP

1 stop35h 00mAvianca

Mon 15/1207:00AEP - LHR

1 stop28h 35mAvianca

Deal found 15/9£908

Sun 26/1012:05LHR - EZE

1 stop23h 15mUnited Airlines

Thu 13/1123:55EZE - LHR

2 stops32h 10mUnited Airlines

Deal found 16/9£780

Sun 15/218:00LHR - AEP

2 stops26h 20mAir Canada

Wed 4/313:40AEP - LHR

2 stops38h 30mAir Canada

Deal found 15/9£1,016

Sun 26/1012:05LHR - EZE

1 stop23h 15mUnited Airlines

Mon 17/1123:55EZE - LHR

2 stops29h 00mUnited Airlines

Deal found 16/9£780

Wed 31/1217:25LHR - AEP

2 stops19h 15mLATAM Airlines

Fri 17/422:55AEP - LHR

1 stop36h 10mLATAM Airlines

Deal found 17/9£1,047

Sun 16/1120:05LHR - AEP

2 stops42h 35mSWISS

Mon 1/1214:55AEP - LHR

3 stops27h 30mSWISS

Deal found 16/9£1,112

Mon 27/1016:20LHR - EZE

2 stops41h 00mUnited Airlines

Wed 12/1122:05EZE - LHR

2 stops28h 50mUnited Airlines

Deal found 16/9£780

Tue 28/1020:15LHR - AEP

1 stop18h 25mLATAM Airlines

Sat 15/1114:55AEP - LHR

2 stops21h 00mLATAM Airlines

Deal found 16/9£1,050

Mon 10/1120:05LHR - AEP

2 stops42h 35mSWISS

Wed 12/1114:55AEP - LHR

2 stops19h 05mSWISS

Deal found 16/9£1,114

Sat 25/1016:40LHR - EZE

2 stops41h 40mUnited Airlines

Thu 13/1122:05EZE - LHR

2 stops29h 35mUnited Airlines

Deal found 16/9£780

Tue 2/1220:15LHR - AEP

2 stops26h 25mLATAM Airlines

Tue 16/1214:55AEP - LHR

1 stop20h 10mLATAM Airlines

Deal found 15/9£1,072

Direct flights from Heathrow to Buenos Aires
Explore direct flight options from Heathrow to Buenos Aires based on user searches, and compare prices and availability for your desired travel dates. Data last updated 17 September 2025.

Sun 11/122:00LHR - EZE

Nonstop16h 45mBritish Airways

Thu 22/113:35EZE - LHR

Nonstop16h 00mBritish Airways

Deal found 16/9£1,227

Fri 21/1122:00LHR - EZE

Nonstop16h 45mBritish Airways

Wed 3/1213:35EZE - LHR

Nonstop16h 00mBritish Airways

Deal found 15/9£1,255

Mon 5/122:00LHR - EZE

Nonstop16h 45mBritish Airways

Mon 26/113:35EZE - LHR

Nonstop16h 00mBritish Airways

Deal found 15/9£1,285

Tue 11/1122:00LHR - EZE

Nonstop16h 45mBritish Airways

Mon 17/1113:35EZE - LHR

Nonstop16h 00mBritish Airways

Deal found 16/9£1,353

Wed 12/1122:00LHR - EZE

Nonstop16h 45mBritish Airways

Mon 17/1113:35EZE - LHR

Nonstop16h 00mBritish Airways

Deal found 16/9£1,354

Tue 11/1122:00LHR - EZE

Nonstop16h 45mBritish Airways

Tue 25/1113:35EZE - LHR

Nonstop16h 00mBritish Airways

Deal found 16/9£1,428

Thu 13/1122:00LHR - EZE

Nonstop16h 45mBritish Airways

Fri 28/1113:35EZE - LHR

Nonstop16h 00mBritish Airways

Deal found 16/9£1,451

Sat 24/122:00LHR - EZE

Nonstop16h 45mBritish Airways

Fri 13/213:35EZE - LHR

Nonstop16h 00mBritish Airways

Deal found 16/9£1,481

Sat 14/322:00LHR - EZE

Nonstop16h 45mBritish Airways

Sat 21/313:35EZE - LHR

Nonstop16h 00mBritish Airways

Deal found 15/9£1,508

Mon 10/1122:00LHR - EZE

Nonstop16h 45mBritish Airways

Fri 12/1213:35EZE - LHR

Nonstop16h 00mBritish Airways

Deal found 16/9£1,612

Last-minute flights from Heathrow to Buenos Aires
Discover last-minute flight deals from Heathrow to Buenos Aires. Data last updated 17 September 2025 and is based on user searches.

Mon 22/922:05LHR - EZE

1 stop21h 15mAvianca

Sun 5/1006:50EZE - LHR

1 stop28h 45mAvianca

Deal found 15/9£719

Mon 22/922:05LHR - EZE

1 stop21h 15mAvianca

Sun 28/901:40EZE - LHR

1 stop33h 55mAvianca

Deal found 15/9£741

Mon 22/922:05LHR - EZE

1 stop21h 15mAvianca

Thu 9/1001:40EZE - LHR

1 stop33h 55mAvianca

Deal found 15/9£743

Mon 22/922:05LHR - AEP

1 stop35h 35mAvianca

Mon 29/907:00AEP - LHR

1 stop28h 35mAvianca

Deal found 15/9£762

Wed 24/922:05LHR - EZE

1 stop21h 15mAvianca

Wed 1/1006:50EZE - LHR

1 stop28h 45mAvianca

Deal found 15/9£718

Wed 24/922:05LHR - EZE

1 stop21h 15mAvianca

Thu 23/1016:45EZE - LHR

1 stop18h 50mAvianca

Deal found 15/9£719

Wed 24/922:05LHR - EZE

1 stop21h 15mAvianca

Thu 9/1016:45EZE - LHR

1 stop18h 50mAvianca

Deal found 15/9£727

Wed 24/922:05LHR - AEP

1 stop35h 35mAvianca

Thu 23/1007:00AEP - LHR

1 stop28h 35mAvianca

Deal found 16/9£765

Wed 24/922:05LHR - AEP

1 stop35h 35mAvianca

Wed 8/1007:00AEP - LHR

1 stop28h 35mAvianca

Deal found 15/9£768

Thu 9/1022:05LHR - EZE

1 stop30h 05mAvianca

Thu 23/1001:40EZE - LHR

1 stop33h 55mAvianca

Deal found 15/9£723

Thu 9/1022:05LHR - EZE

1 stop35h 40mAvianca

Fri 7/1116:55EZE - LHR

1 stop18h 40mAvianca

Deal found 16/9£728

Tue 28/1021:40LHR - EZE

1 stop35h 10mAvianca

Sat 15/1116:55EZE - LHR

1 stop18h 40mAvianca

Deal found 15/9£700

One-way flights from Heathrow to Buenos Aires
Search for one-way flight options from Heathrow to Buenos Aires. Find affordable one-way fares based on user searches. Data last updated 17 September 2025.

Mon 26/109:55LHR - EZE

2 stops35h 48mMultiple Airlines

Deal found 15/9£521

Wed 18/215:45LHR - AEP

3 stops23h 55mMultiple Airlines

Deal found 16/9£523

Wed 14/109:15LHR - EZE

2 stops19h 15mMultiple Airlines

Deal found 15/9£524

Sat 15/1106:00LHR - AEP

2 stops23h 20mMultiple Airlines

Deal found 15/9£527

Tue 23/906:00LHR - AEP

2 stops27h 20mMultiple Airlines

Deal found 15/9£528

Tue 27/108:15LHR - AEP

2 stops36h 05mMultiple Airlines

Deal found 15/9£529

Sun 18/118:45LHR - EZE

1 stop27h 15mMultiple Airlines

Deal found 16/9£530

Tue 30/920:50LHR - EZE

3 stops58h 55mMultiple Airlines

Deal found 16/9£531

Wed 15/1017:50LHR - AEP

3 stops51h 40mMultiple Airlines

Deal found 15/9£532

Fri 26/922:05LHR - EZE

2 stops28h 20mMultiple Airlines

Deal found 16/9£532

Sat 28/215:45LHR - AEP

3 stops26h 55mMultiple Airlines

Deal found 15/9£535

Thu 22/111:05LHR - AEP

3 stops31h 25mMultiple Airlines

Deal found 15/9£535

Cheapflights Fare Finder

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 - EZE

LHREZE

London Heathrow

Tue 28/10

12:05-08:20

1 stop23h 15m

Buenos Aires Ministro Pistarini

Mon 17/11

23:55-08:25

2 stops29h 30m

£780

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Sat 25/10

16:40-06:20

2 stops41h 40m

Buenos Aires Ministro Pistarini

Fri 14/11

23:55-09:40

2 stops30h 45m

£780

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Sat 25/10

16:40-06:20

2 stops41h 40m

Buenos Aires Ministro Pistarini

Sun 16/11

22:05-07:30

1 stop30h 25m

£780

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Sun 26/10

12:05-08:20

1 stop23h 15m

Buenos Aires Ministro Pistarini

Thu 13/11

23:55-11:05

2 stops32h 10m

£780

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Sun 26/10

12:05-08:20

1 stop23h 15m

Buenos Aires Ministro Pistarini

Mon 17/11

23:55-07:55

2 stops29h 00m

£780

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Mon 27/10

16:20-06:20

2 stops41h 00m

Buenos Aires Ministro Pistarini

Wed 12/11

22:05-05:55

2 stops28h 50m

£780

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Sat 25/10

16:40-06:20

2 stops41h 40m

Buenos Aires Ministro Pistarini

Thu 13/11

22:05-06:40

2 stops29h 35m

£780

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Tue 7/10

10:50-07:35

1 stop24h 45m

Buenos Aires Ministro Pistarini

Thu 23/10

12:15-07:55

1 stop15h 40m

£823

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Tue 7/10

20:00-16:20

1 stop24h 20m

Buenos Aires Ministro Pistarini

Thu 6/11

13:35-08:35

1 stop16h 00m

£823

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Sat 8/11

21:40-05:40

1 stop35h 00m

Buenos Aires Jorge Newbery

Tue 11/11

07:00-14:35

1 stop28h 35m

£862

Flights are sorted by cheapest return flights first.

Deals found on 16/9

Showing 1-10 of 43 results

...

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 63 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, May is the cheapest month in which you can book a flight from London Heathrow Airport to Buenos Aires (average of £1,012). Flying from London Heathrow Airport to Buenos Aires in December is currently the most expensive (average of £1,250). 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?

It’s typically best to fly out from London Heathrow Airport to Buenos Aires in the morning. Doing so could potentially save you 22% 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?

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

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?

Frankfurt am Main (FRA) – chosen by Cheapflights users on 25% 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?

Toronto (YYZ) is the most affordable one-stop option, with an average return flight price of £697.

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

Flights via Amsterdam (AMS) have the shortest average one-way travel time for one-stop routes: 16h 07m.

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

Flights via Amsterdam (AMS) offer the fastest connection on this route, with an average stopover time of 1h 30m.

Reviews of airlines servicing Buenos Aires

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

1,324 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.

Finnair

7.6

Good

1,324 reviews

Finnair

7.6

Good

1,324 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

LATAM Airlines

7.5

Good

1,847 reviews

Finnair

7.6

Good

1,324 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

Iberia

7.0

Good

2,924 reviews

Finnair

7.6

Good

1,324 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

Lufthansa

6.8

Okay

7,407 reviews

Finnair

7.6

Good

1,324 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

British Airways

6.7

Okay

7,363 reviews

Finnair

7.6

Good

1,324 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

Related info for your journey

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 23h 15m. United Airlines provides one of the quickest options available for as low as £780. 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 £439 on this airline. Additional options worth looking into are Air Canada and Avianca, starting at £634 and £696 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 £1,061. While the most popular route (London Heathrow - Buenos Aires Ministro Pistarini) can be booked for £719 on average, our data indicates £1,874 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, May is the cheapest month in which you can book a flight from London Heathrow Airport to Buenos Aires (average of £1,012). Flying from London Heathrow Airport to Buenos Aires in December is currently the most expensive (average of £1,250). 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

Alternative routes for Heathrow to Buenos Aires

Heathrow to Ministro Pistarini flights

Heathrow to Jorge Newbery flights

Gatwick to Ministro Pistarini flights

London City to Ministro Pistarini flights

Luton to Ministro Pistarini flights

London City to Jorge Newbery flights

Heathrow to Cordoba flights

Heathrow to Mendoza flights

Gatwick to Cordoba flights

London City to Mendoza flights

Heathrow to Ushuaia flights

Gatwick to Ushuaia flights

London City to Cordoba flights

Stansted to Mendoza flights

Heathrow to San Carlos de Bariloche flights

Heathrow to Salta flights

Gatwick to San Carlos de Bariloche flights

Heathrow to Rosario flights

Gatwick to Rosario flights

Other flights to Buenos Aires

Heathrow to Ministro Pistarini flights

Buenos Aires Ministro Pistarini Airport to Puerto Iguazú flights

Buenos Aires Jorge Newbery Airport to Puerto Iguazú flights

Buenos Aires Jorge Newbery Airport to Mendoza flights

Buenos Aires Jorge Newbery Airport to San Carlos de Bariloche flights

Buenos Aires Ministro Pistarini Airport to San Carlos de Bariloche flights

Buenos Aires Ministro Pistarini Airport to Ushuaia flights

Buenos Aires Jorge Newbery Airport to Puerto Iguazú flights

Buenos Aires Ministro Pistarini Airport to Puerto Iguazú flights

Buenos Aires Ministro Pistarini Airport to El Calafate flights

Buenos Aires Jorge Newbery Airport to Mendoza flights

Buenos Aires Jorge Newbery Airport to El Calafate flights

Buenos Aires Jorge Newbery Airport to Ushuaia flights

Buenos Aires Jorge Newbery Airport to Santiago flights

Buenos Aires Jorge Newbery Airport to Ushuaia flights

Buenos Aires Ministro Pistarini Airport to Ushuaia flights

Buenos Aires Jorge Newbery Airport to Santiago flights

Buenos Aires Ministro Pistarini Airport to Lima flights

Buenos Aires Ministro Pistarini Airport to Barcelona-El Prat Airport flights

Top 8 airlines flying from Heathrow to Buenos Aires

Airline	Cheapest	Average	Flexibility	On-time
Air France	Cheapest£439	Average£1,189	FlexibilityNo cancel fee	On-time77%	Search Air France flights
Air Canada	Cheapest£634	Average£665	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
Avianca	Cheapest£696	Average£782	FlexibilityNo cancel fee	On-time71%	Search Avianca flights
Iberia	Cheapest£707	Average£957	FlexibilityNo cancel fee	On-time77%	Search Iberia flights
Finnair	Cheapest£726	Average£930	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
British Airways	Cheapest£785	Average£1,049	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Lufthansa	Cheapest£808	Average£1,161	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
LATAM Airlines	Cheapest£858	Average£1,125	FlexibilityNo cancel fee	On-time81%	Search LATAM Airlines flights

Fly with Cheapflights

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.

Cheap flights from London Heathrow Airport to Buenos Aires from £521

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 26/1. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from London Heathrow to Buenos Aires are usually found in February or January, booked 63 days in advance, depart on a Monday or Tuesday and return on a Monday

Cheap flight deals from Heathrow to Buenos Aires

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Find flight deals from Heathrow to Buenos Aires

Cheapest flights from Heathrow to Buenos AiresExplore 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 17 September 2025.

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 17 September 2025.

Cheapflights Fare Finder

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

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.

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 12 September 2025.

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

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 17 September 2025.

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.

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.

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.

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.

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.

Reviews of airlines servicing Buenos Aires

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.

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?

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

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

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

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

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

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

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.

Alternative routes for Heathrow to Buenos Aires

See prices for flight routes from nearby airports that may be better suited for you.

Top 8 airlines flying from Heathrow to Buenos Aires

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?

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

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

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

100% Free

Book with Flexibility

Travel Smart

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 17 September 2025.