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Cheap flights from London Heathrow Airport to Buenos Aires from £430

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 13/4. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — BUE
30 Mar — 6 Apr1
1 adult

Cheapflights Tip: The best prices from London Heathrow to Buenos Aires are usually found in May or January, booked 89 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 25 March 2025.

Round-trip from

£814

One-way from

£430

Popular in

December

Cheapest in

May

Average price

£885

Good round-trip deal

£1,037 or less

Good one-way deal

£740 or less
Air Canada
  • Air Canada
  • 17/9-8/10
  • 4 total stops
  • 62h 40m total
  • London to Buenos Aires
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13/4
  • 13/4
  • 3 total stops
  • 49h 40m total
  • London to Buenos Aires
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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 (£23 potential savings vs. average return price).
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Average for round-trip flights in March 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 25 March 2025.

Wed 26/1119:40LHR - EZE
1 stop24h 45mIberia
Fri 5/1213:35EZE - LHR
Nonstop16h 00mIberia
Deal found 24/3£804
Wed 17/915:50LHR - EZE
2 stops26h 40mAir Canada
Wed 8/1016:35EZE - LHR
2 stops36h 00mAir Canada
Deal found 24/3£814
Wed 10/908:40LHR - AEP
2 stops29h 50mSWISS
Sun 21/912:55AEP - LHR
2 stops20h 05mSWISS
Deal found 24/3£816
Thu 13/1122:10LHR - EZE
1 stop16h 40mMultiple Airlines
Thu 4/1213:35EZE - LHR
1 stop16h 00mMultiple Airlines
Deal found 25/3£821
Mon 12/522:05LHR - EZE
1 stop21h 15mAvianca
Sat 17/516:45EZE - LHR
1 stop18h 50mAvianca
Deal found 24/3£825
Thu 20/1114:30LHR - AEP
2 stops29h 40mAir Canada
Thu 4/1213:35AEP - LHR
2 stops38h 35mAir Canada
Deal found 25/3£831
Mon 19/521:20LHR - AEP
1 stop17h 10mLATAM Airlines
Tue 3/614:55AEP - LHR
1 stop20h 10mLATAM Airlines
Deal found 24/3£851
Mon 13/1020:00LHR - EZE
1 stop24h 20mBritish Airways
Wed 29/1014:20EZE - LHR
1 stop21h 35mBritish Airways
Deal found 24/3£862
Thu 8/511:20LHR - AEP
2 stops34h 00mMultiple Airlines
Wed 21/518:20AEP - LHR
2 stops38h 25mMultiple Airlines
Deal found 25/3£865
Thu 11/916:20LHR - EZE
1 stop21h 55mAmerican Airlines
Wed 24/921:15EZE - LHR
1 stop20h 25mAmerican Airlines
Deal found 24/3£872
Tue 4/1119:40LHR - EZE
2 stops26h 05mLATAM Airlines
Tue 18/1110:02EZE - LHR
2 stops25h 03mLATAM Airlines
Deal found 24/3£894
Thu 11/920:05LHR - EZE
2 stops42h 40mSWISS
Tue 23/906:40EZE - LHR
2 stops31h 10mSWISS
Deal found 25/3£895

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 25 March 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

Wed 17/9

15:50-14:30

2 stops26h 40m

Buenos Aires Ministro Pistarini

Wed 8/10

16:35-08:35

2 stops36h 00m

£814

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Wed 10/9

08:40-10:30

2 stops29h 50m

Buenos Aires Jorge Newbery

Sun 21/9

12:55-13:00

2 stops20h 05m

£816

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Mon 12/5

22:05-15:20

1 stop21h 15m

Buenos Aires Ministro Pistarini

Sat 17/5

16:45-15:35

1 stop18h 50m

£825

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Mon 1/9

22:00-10:35

Nonstop16h 35m

Buenos Aires Ministro Pistarini

Tue 30/9

12:15-08:10

Nonstop15h 55m

£839

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Mon 19/5

21:20-10:30

1 stop17h 10m

Buenos Aires Jorge Newbery

Tue 3/6

14:55-15:05

1 stop20h 10m

£851

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Wed 17/9

19:45-12:50

2 stops21h 05m

Buenos Aires Ministro Pistarini

Wed 8/10

14:25-16:15

1 stop21h 50m

£858

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Thu 8/5

11:20-17:20

2 stops34h 00m

Buenos Aires Jorge Newbery

Wed 21/5

18:20-12:45

2 stops38h 25m

£865

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Thu 11/9

14:10-10:15

1 stop24h 05m

Buenos Aires Ministro Pistarini

Thu 25/9

21:15-21:40

1 stop20h 25m

£872

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Wed 17/9

09:30-17:20

2 stops35h 50m

Buenos Aires Jorge Newbery

Wed 8/10

13:40-10:00

2 stops40h 20m

£889

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Thu 11/9

20:05-10:45

2 stops42h 40m

Buenos Aires Ministro Pistarini

Tue 23/9

06:40-17:50

2 stops31h 10m

£895

Flights are sorted by cheapest return flights first.

Deals found on 24/3

Showing 1-10 of 36 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 21 March 2025.

Booking 89 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, June is the cheapest month in which you can book a flight from London Heathrow Airport to Buenos Aires (average of £988). 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 25 March 2025.

It’s typically best to fly out from London Heathrow Airport to Buenos Aires in the morning. Doing so could potentially save you 18% 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.

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 25 March 2025.
To help decide which airline to fly from London to Buenos Aires, see what other customers have to say about Emirates, Delta and Finnair. 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
3,190 reviews
Check prices

Crew

8.3

Comfort

8.0

Food

7.8

Boarding

8.1

Overall

8.0

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
3,190 reviews
Emirates
8.0
Very Good
3,190 reviews
Check prices

Crew

8.3

Comfort

8.0

Food

7.8

Boarding

8.1

Overall

8.0

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
7,890 reviews
Emirates
8.0
Very Good
3,190 reviews
Check prices

Crew

8.3

Comfort

8.0

Food

7.8

Boarding

8.1

Overall

8.0

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
1,266 reviews
Emirates
8.0
Very Good
3,190 reviews
Check prices

Crew

8.3

Comfort

8.0

Food

7.8

Boarding

8.1

Overall

8.0

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
1,569 reviews
Emirates
8.0
Very Good
3,190 reviews
Check prices

Crew

8.3

Comfort

8.0

Food

7.8

Boarding

8.1

Overall

8.0

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.
LATAM Airlines
7.5
Good
1,749 reviews
Emirates
8.0
Very Good
3,190 reviews
Check prices

Crew

8.3

Comfort

8.0

Food

7.8

Boarding

8.1

Overall

8.0

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 Air Canada. Our recent data shows that you can find tickets from as low as £814 on this airline. Additional options worth looking into are SWISS and Avianca, starting at £816 and £825 round-trip. Air Canada is 14% 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?

    £501 is the cheapest one-way deal found within the past few days, from Vueling. You may also be able to find cheap deals on Avianca and United Airlines, with prices starting from £554 and £567, respectively.

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

    Looking at all options, your cheapest flight can be booked for £723. While the most popular route (London Heathrow - Buenos Aires Ministro Pistarini) can be booked for £858 on average our data indicates £1,415 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, June is the cheapest month in which you can book a flight from London Heathrow Airport to Buenos Aires (average of £988). 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

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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 25 March 2025.
AirlineCheapestAverageFlexibilityOn-time
Air FranceCheapest£463Average£1,075FlexibilityNo cancel feeOn-time77%
Search Air France flights
Air CanadaCheapest£669Average£701FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Turkish AirlinesCheapest£681Average£696FlexibilityNo cancel feeOn-time77%
Search Turkish Airlines flights
LufthansaCheapest£716Average£1,078FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
IberiaCheapest£721Average£901FlexibilityNo cancel feeOn-time77%
Search Iberia flights
FinnairCheapest£764Average£845FlexibilityNo cancel feeOn-time76%
Search Finnair flights
British AirwaysCheapest£781Average£1,044FlexibilityNo cancel feeOn-time70%
Search British Airways flights
KLMCheapest£867Average£1,188FlexibilityNo cancel feeOn-time75%
Search KLM flights
LATAM AirlinesCheapest£899Average£1,226FlexibilityNo cancel feeOn-time81%
Search LATAM Airlines 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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