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Cheap flights from London Heathrow Airport to Buenos Aires from £496

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 14/10. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — BUE
17 Jul — 24 Jul1
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 Tuesday or Wednesday 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 12 July 2025.

Round-trip from

£796

One-way from

£496

Popular in

December

Cheapest in

January

Average price

£1,042

Good round-trip deal

£937 or less
Avianca
  • Avianca
  • 31/8-21/9
  • 2 total stops
  • 64h 10m total
  • London to Buenos Aires
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14/10
  • 14/10
  • 3 total stops
  • 39h 00m total
  • London to Buenos Aires
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Highest demand for flights based on searches. 5% potential increase in price (£44 potential increase over avg. return price).
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Cheapest flight prices on average. 3% potential price decrease (£24 potential savings vs. average return price).
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Average for round-trip flights in July 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

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 12 July 2025.

Sun 31/822:05LHR - AEP
1 stop35h 35mAvianca
Sun 21/907:00AEP - LHR
1 stop28h 35mAvianca
Deal found 11/7£796
Mon 15/922:05LHR - EZE
1 stop30h 05mAvianca
Wed 22/1001:40EZE - LHR
1 stop33h 55mAvianca
Deal found 11/7£800
Mon 1/910:00LHR - EZE
1 stop26h 00mUnited Airlines
Tue 16/921:00EZE - LHR
1 stop30h 40mUnited Airlines
Deal found 10/7£801
Thu 13/1113:25LHR - AEP
2 stops30h 45mAir Canada
Mon 17/1113:35AEP - LHR
2 stops38h 35mAir Canada
Deal found 11/7£806
Sat 25/1010:00LHR - EZE
1 stop26h 20mLufthansa
Sat 8/1123:55EZE - LHR
1 stop31h 20mLufthansa
Deal found 11/7£807
Tue 4/1118:00LHR - EZE
1 stop24h 10mAir Canada
Wed 12/1116:45EZE - LHR
1 stop39h 35mAir Canada
Deal found 10/7£808
Tue 11/1108:15LHR - AEP
2 stops39h 45mMultiple Airlines
Mon 17/1109:00AEP - LHR
2 stops29h 30mMultiple Airlines
Deal found 11/7£813
Thu 17/706:15LHR - EZE
1 stop19h 30mMultiple Airlines
Wed 30/714:25EZE - LHR
1 stop37h 15mMultiple Airlines
Deal found 11/7£823
Tue 4/1119:40LHR - AEP
2 stops23h 20mLATAM Airlines
Tue 25/1118:20AEP - LHR
1 stop16h 45mLATAM Airlines
Deal found 11/7£841
Sat 8/1119:40LHR - EZE
2 stops40h 24mLATAM Airlines
Sat 29/1115:50EZE - LHR
2 stops27h 05mLATAM Airlines
Deal found 10/7£852
Sun 16/1110:00LHR - EZE
2 stops27h 50mAmerican Airlines
Fri 28/1122:50EZE - LHR
1 stop33h 40mAmerican Airlines
Deal found 11/7£857
Thu 13/1106:20LHR - EZE
1 stop17h 00mAir France
Thu 27/1122:40EZE - LHR
1 stop16h 40mAir France
Deal found 10/7£867

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 12 July 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 31/8

22:05-05:40

1 stop35h 35m

Buenos Aires Jorge Newbery

Sun 21/9

07:00-15:35

1 stop28h 35m

£796

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Mon 15/9

22:05-00:10

1 stop30h 05m

Buenos Aires Ministro Pistarini

Wed 22/10

01:40-15:35

1 stop33h 55m

£800

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Mon 1/9

10:00-08:00

1 stop26h 00m

Buenos Aires Ministro Pistarini

Tue 16/9

21:00-07:40

1 stop30h 40m

£801

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Thu 13/11

13:25-17:10

2 stops30h 45m

Buenos Aires Jorge Newbery

Mon 17/11

13:35-07:10

2 stops38h 35m

£806

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Sat 25/10

10:00-08:20

1 stop26h 20m

Buenos Aires Ministro Pistarini

Sat 8/11

23:55-10:15

1 stop31h 20m

£807

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Tue 4/11

18:00-15:10

1 stop24h 10m

Buenos Aires Ministro Pistarini

Wed 12/11

16:45-11:20

1 stop39h 35m

£808

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Tue 11/11

08:15-21:00

2 stops39h 45m

Buenos Aires Jorge Newbery

Mon 17/11

09:00-17:30

2 stops29h 30m

£813

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Tue 28/10

06:35-15:10

3 stops35h 35m

Buenos Aires Ministro Pistarini

Wed 19/11

16:45-11:20

2 stops39h 35m

£827

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Tue 4/11

19:40-16:00

2 stops23h 20m

Buenos Aires Jorge Newbery

Tue 25/11

18:20-14:05

1 stop16h 45m

£841

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Sat 8/11

19:40-09:04

2 stops40h 24m

Buenos Aires Ministro Pistarini

Sat 29/11

15:50-21:55

2 stops27h 05m

£852

Flights are sorted by cheapest return flights first.

Deals found on 11/7

Showing 1-10 of 20 results
1
2

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 27 June 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 12 July 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.

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 12 July 2025.
Read through reviews of airlines operating flights from London Heathrow Airport to Buenos Aires, such as LATAM Airlines, Air France, andAeromexico. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
LATAM Airlines
7.5
Good
1,807 reviews
Check prices

Crew

8.1

Food

6.7

Overall

7.5

Comfort

7.4

Boarding

7.6

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Murilo,Jun 2025

SFO - LAX

I had mixed feelings regarding this flight. Called several times Latam and Delta regarding the purchase of checked baggage and price. I was told 80 dollars, could not buy it ahead of time,, they told me it was not Possible, that I had to buy at the airport. Check in my luggage the attendant says 80 dollars but I was charged 200 . No one could get me a solid answer why. Very disappointing
LATAM Airlines
7.5
Good
1,807 reviews
LATAM Airlines
7.5
Good
1,807 reviews
Check prices

Crew

8.1

Food

6.7

Overall

7.5

Comfort

7.4

Boarding

7.6

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Murilo,Jun 2025

SFO - LAX

I had mixed feelings regarding this flight. Called several times Latam and Delta regarding the purchase of checked baggage and price. I was told 80 dollars, could not buy it ahead of time,, they told me it was not Possible, that I had to buy at the airport. Check in my luggage the attendant says 80 dollars but I was charged 200 . No one could get me a solid answer why. Very disappointing
Air France
7.5
Good
1,468 reviews
LATAM Airlines
7.5
Good
1,807 reviews
Check prices

Crew

8.1

Food

6.7

Overall

7.5

Comfort

7.4

Boarding

7.6

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Murilo,Jun 2025

SFO - LAX

I had mixed feelings regarding this flight. Called several times Latam and Delta regarding the purchase of checked baggage and price. I was told 80 dollars, could not buy it ahead of time,, they told me it was not Possible, that I had to buy at the airport. Check in my luggage the attendant says 80 dollars but I was charged 200 . No one could get me a solid answer why. Very disappointing
Aeromexico
7.5
Good
1,719 reviews
LATAM Airlines
7.5
Good
1,807 reviews
Check prices

Crew

8.1

Food

6.7

Overall

7.5

Comfort

7.4

Boarding

7.6

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Murilo,Jun 2025

SFO - LAX

I had mixed feelings regarding this flight. Called several times Latam and Delta regarding the purchase of checked baggage and price. I was told 80 dollars, could not buy it ahead of time,, they told me it was not Possible, that I had to buy at the airport. Check in my luggage the attendant says 80 dollars but I was charged 200 . No one could get me a solid answer why. Very disappointing
United Airlines
7.4
Good
8,850 reviews
LATAM Airlines
7.5
Good
1,807 reviews
Check prices

Crew

8.1

Food

6.7

Overall

7.5

Comfort

7.4

Boarding

7.6

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Murilo,Jun 2025

SFO - LAX

I had mixed feelings regarding this flight. Called several times Latam and Delta regarding the purchase of checked baggage and price. I was told 80 dollars, could not buy it ahead of time,, they told me it was not Possible, that I had to buy at the airport. Check in my luggage the attendant says 80 dollars but I was charged 200 . No one could get me a solid answer why. Very disappointing
American Airlines
7.2
Good
10,000 reviews
LATAM Airlines
7.5
Good
1,807 reviews
Check prices

Crew

8.1

Food

6.7

Overall

7.5

Comfort

7.4

Boarding

7.6

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Murilo,Jun 2025

SFO - LAX

I had mixed feelings regarding this flight. Called several times Latam and Delta regarding the purchase of checked baggage and price. I was told 80 dollars, could not buy it ahead of time,, they told me it was not Possible, that I had to buy at the airport. Check in my luggage the attendant says 80 dollars but I was charged 200 . No one could get me a solid answer why. Very disappointing

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 £796 on this airline. Additional options worth looking into are United Airlines and Air Canada, starting at £801 and £806 round-trip. Avianca is 15% 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?

    £560 is the cheapest one-way deal found within the past few days, from Aeromexico. You may also be able to find cheap deals on United Airlines and LATAM Airlines, with prices starting from £569 and £613, respectively.

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

    Looking at all options, your cheapest flight can be booked for £878. While the most popular route (London Heathrow - Buenos Aires Ministro Pistarini) can be booked for £737 on average our data indicates £1,699 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 12 July 2025.
AirlineCheapestAverageFlexibilityOn-time
Air FranceCheapest£443Average£1,099FlexibilityNo cancel feeOn-time77%
Search Air France flights
Air CanadaCheapest£640Average£681FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
IberiaCheapest£689Average£893FlexibilityNo cancel feeOn-time77%
Search Iberia flights
FinnairCheapest£732Average£992FlexibilityNo cancel feeOn-time76%
Search Finnair flights
British AirwaysCheapest£753Average£1,035FlexibilityNo cancel feeOn-time70%
Search British Airways flights
KLMCheapest£780Average£1,025FlexibilityNo cancel feeOn-time75%
Search KLM flights
LufthansaCheapest£815Average£1,200FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
LATAM AirlinesCheapest£860Average£1,085FlexibilityNo 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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