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Cheap flights from London Heathrow Airport to Buenos Aires from £436

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 2/9. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — BUE
3 May — 10 May1
1 adult

Cheapflights Tip: The best prices from London Heathrow to Buenos Aires are usually found in January or March, booked 61 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday

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 28 April 2025.

Round-trip from

£822

One-way from

£436

Popular in

December

Cheapest in

January

Average price

£947

Good round-trip deal

£880 or less

Good one-way deal

£755 or less
Avianca
  • Avianca
  • 9/6-24/6
  • 2 total stops
  • 40h 05m total
  • London to Buenos Aires
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2/9
  • 2/9
  • 2 total stops
  • 23h 30m total
  • London to Buenos Aires
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Highest demand for flights based on searches. 6% potential increase in price (£46 potential increase over avg. return price).
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Cheapest flight prices on average. 3% potential price decrease (£22 potential savings vs. average return price).
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Average for round-trip flights in April 2025
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Price to beat on a round-trip flight from London Heathrow to Buenos Aires (BUE).
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Price to beat on a one-way flight from London Heathrow to Buenos Aires (BUE).
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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 28 April 2025.

Mon 9/622:05LHR - EZE
1 stop21h 15mAvianca
Tue 24/616:45EZE - LHR
1 stop18h 50mAvianca
Deal found 28/4£822
Sun 2/1114:30LHR - EZE
3 stops27h 55mAir Canada
Thu 5/317:00EZE - LHR
2 stops39h 50mAir Canada
Deal found 27/4£825
Sun 2/1111:10LHR - AEP
2 stops33h 00mAir Canada
Wed 26/1113:35AEP - LHR
2 stops38h 35mAir Canada
Deal found 28/4£827
Wed 14/517:30LHR - EZE
1 stop16h 55mLufthansa
Tue 8/706:40EZE - LHR
2 stops29h 00mLufthansa
Deal found 27/4£829
Sun 8/621:20LHR - AEP
1 stop20h 40mLATAM Airlines
Tue 24/618:20AEP - LHR
1 stop16h 45mLATAM Airlines
Deal found 27/4£830
Sat 17/519:10LHR - EZE
1 stop25h 10mMultiple Airlines
Wed 2/712:15EZE - LHR
1 stop15h 40mMultiple Airlines
Deal found 27/4£848
Wed 28/519:45LHR - EZE
1 stop30h 10mAir France
Tue 24/623:55EZE - LHR
1 stop17h 30mAir France
Deal found 27/4£849
Sat 3/518:30LHR - AEP
2 stops18h 50mMultiple Airlines
Thu 9/1013:40AEP - LHR
2 stops19h 00mMultiple Airlines
Deal found 28/4£853
Mon 2/617:00LHR - EZE
1 stop18h 35mBritish Airways
Sun 29/613:00EZE - LHR
1 stop16h 30mBritish Airways
Deal found 28/4£855
Thu 11/917:00LHR - EZE
1 stop21h 15mAmerican Airlines
Tue 23/922:00EZE - LHR
2 stops28h 20mAmerican Airlines
Deal found 27/4£867
Wed 5/1114:30LHR - EZE
1 stop21h 30mFinnair
Sat 22/1121:00EZE - LHR
1 stop20h 00mFinnair
Deal found 28/4£867
Sat 15/1120:05LHR - AEP
2 stops42h 55mSWISS
Fri 28/1114:55AEP - LHR
2 stops22h 25mSWISS
Deal found 28/4£876

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 28 April 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 - EZE

LHREZE

London Heathrow

Mon 9/6

22:05-15:20

1 stop21h 15m

Buenos Aires Ministro Pistarini

Tue 24/6

16:45-15:35

1 stop18h 50m

£822

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Wed 14/5

17:30-06:25

1 stop16h 55m

Buenos Aires Ministro Pistarini

Tue 8/7

06:40-15:40

2 stops29h 00m

£829

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Sun 8/6

21:20-14:00

1 stop20h 40m

Buenos Aires Jorge Newbery

Tue 24/6

18:20-15:05

1 stop16h 45m

£830

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Thu 29/5

06:15-21:55

1 stop19h 40m

Buenos Aires Ministro Pistarini

Tue 24/6

23:55-21:25

1 stop17h 30m

£839

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Wed 1/10

12:05-14:30

2 stops30h 25m

Buenos Aires Ministro Pistarini

Thu 16/10

16:35-06:35

2 stops34h 00m

£842

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Tue 14/10

14:05-17:20

2 stops31h 15m

Buenos Aires Jorge Newbery

Tue 25/11

13:35-11:50

2 stops43h 15m

£847

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Sat 17/5

19:10-16:20

1 stop25h 10m

Buenos Aires Ministro Pistarini

Wed 2/7

12:15-07:55

1 stop15h 40m

£848

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Mon 2/6

17:00-07:35

1 stop18h 35m

Buenos Aires Ministro Pistarini

Sun 29/6

13:00-09:30

1 stop16h 30m

£855

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Tue 14/10

07:45-06:40

2 stops26h 55m

Buenos Aires Jorge Newbery

Mon 24/11

00:05-14:05

1 stop35h 00m

£859

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Thu 11/9

17:00-10:15

1 stop21h 15m

Buenos Aires Ministro Pistarini

Tue 23/9

22:00-05:50

2 stops27h 50m

£867

Flights are sorted by cheapest return flights first.

Deals found on 28/4

Showing 1-10 of 32 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 25 April 2025.

Booking 61 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?

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 28 April 2025.

It’s typically best to fly out from London Heathrow Airport to Buenos Aires in the morning. Doing so could potentially save you 19% 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 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.

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 28 April 2025.

The most flights from LHR to BUE are scheduled on a Monday (2 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (2 on average).

Rainfall in Buenos Aires by month

Plan your trip to Buenos Aires by taking into account the average rainfall totals by month.

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.

Temperature in Buenos Aires by month

Plan your trip to Buenos Aires by taking into account the average temperature totals by month.

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).

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 28 April 2025.
To help decide which airline to fly from London to Buenos Aires, see what other customers have to say about Emirates, Delta and KLM. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Emirates
8.0
Very Good
3,213 reviews
Check prices

Crew

8.3

Comfort

8.0

Food

7.8

Overall

8.0

Boarding

8.1

Entertainment

8.2

Reviews

1 / 20
10.0
Excellent

Steven,Feb 2025

GLA - DXB

Although I was in economy it made no difference where the staff were concerned they were attentive and pleasant throughout the flight maybe one day I'll get the chance to see if there's a difference in business or 1st class service but in truth for the way I was treated I can only see the menu being an upgrade as the staff don't need upgrading and are indeed the biggest asset on a long journey a credit to the company.
Emirates
8.0
Very Good
3,213 reviews
Emirates
8.0
Very Good
3,213 reviews
Check prices

Crew

8.3

Comfort

8.0

Food

7.8

Overall

8.0

Boarding

8.1

Entertainment

8.2

Reviews

1 / 20
10.0
Excellent

Steven,Feb 2025

GLA - DXB

Although I was in economy it made no difference where the staff were concerned they were attentive and pleasant throughout the flight maybe one day I'll get the chance to see if there's a difference in business or 1st class service but in truth for the way I was treated I can only see the menu being an upgrade as the staff don't need upgrading and are indeed the biggest asset on a long journey a credit to the company.
Delta
8.0
Very Good
7,929 reviews
Emirates
8.0
Very Good
3,213 reviews
Check prices

Crew

8.3

Comfort

8.0

Food

7.8

Overall

8.0

Boarding

8.1

Entertainment

8.2

Reviews

1 / 20
10.0
Excellent

Steven,Feb 2025

GLA - DXB

Although I was in economy it made no difference where the staff were concerned they were attentive and pleasant throughout the flight maybe one day I'll get the chance to see if there's a difference in business or 1st class service but in truth for the way I was treated I can only see the menu being an upgrade as the staff don't need upgrading and are indeed the biggest asset on a long journey a credit to the company.
KLM
7.8
Good
1,333 reviews
Emirates
8.0
Very Good
3,213 reviews
Check prices

Crew

8.3

Comfort

8.0

Food

7.8

Overall

8.0

Boarding

8.1

Entertainment

8.2

Reviews

1 / 20
10.0
Excellent

Steven,Feb 2025

GLA - DXB

Although I was in economy it made no difference where the staff were concerned they were attentive and pleasant throughout the flight maybe one day I'll get the chance to see if there's a difference in business or 1st class service but in truth for the way I was treated I can only see the menu being an upgrade as the staff don't need upgrading and are indeed the biggest asset on a long journey a credit to the company.
Finnair
7.6
Good
1,273 reviews
Emirates
8.0
Very Good
3,213 reviews
Check prices

Crew

8.3

Comfort

8.0

Food

7.8

Overall

8.0

Boarding

8.1

Entertainment

8.2

Reviews

1 / 20
10.0
Excellent

Steven,Feb 2025

GLA - DXB

Although I was in economy it made no difference where the staff were concerned they were attentive and pleasant throughout the flight maybe one day I'll get the chance to see if there's a difference in business or 1st class service but in truth for the way I was treated I can only see the menu being an upgrade as the staff don't need upgrading and are indeed the biggest asset on a long journey a credit to the company.
SWISS
7.5
Good
1,587 reviews
Emirates
8.0
Very Good
3,213 reviews
Check prices

Crew

8.3

Comfort

8.0

Food

7.8

Overall

8.0

Boarding

8.1

Entertainment

8.2

Reviews

1 / 20
10.0
Excellent

Steven,Feb 2025

GLA - DXB

Although I was in economy it made no difference where the staff were concerned they were attentive and pleasant throughout the flight maybe one day I'll get the chance to see if there's a difference in business or 1st class service but in truth for the way I was treated I can only see the menu being an upgrade as the staff don't need upgrading and are indeed the biggest asset on a long journey a credit to the company.

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.

  • 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 £822 on this airline. Additional options worth looking into are LATAM Airlines and Air Canada, starting at £829 and £842 round-trip. Avianca is 11% 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?

    £498 is the cheapest one-way deal found within the past few days, from LATAM Airlines. You may also be able to find cheap deals on Avianca and United Airlines, with prices starting from £552 and £565, respectively.

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

    Looking at all options, your cheapest flight can be booked for £755. While the most popular route (London Heathrow - Buenos Aires Ministro Pistarini) can be booked for £747 on average our data indicates £845 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

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 28 April 2025.
AirlineCheapestAverageFlexibilityOn-time
Air FranceCheapest£448Average£1,007FlexibilityNo cancel feeOn-time77%
Search Air France flights
Air CanadaCheapest£647Average£689FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
IberiaCheapest£698Average£900FlexibilityNo cancel feeOn-time77%
Search Iberia flights
LufthansaCheapest£732Average£1,090FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
FinnairCheapest£740Average£863FlexibilityNo cancel feeOn-time76%
Search Finnair flights
British AirwaysCheapest£755Average£1,017FlexibilityNo cancel feeOn-time70%
Search British Airways flights
KLMCheapest£839Average£1,121FlexibilityNo cancel feeOn-time75%
Search KLM flights
LATAM AirlinesCheapest£871Average£1,187FlexibilityNo cancel feeOn-time81%
Search LATAM Airlines 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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