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Cheap flights from London Heathrow Airport to Buenos Aires from £456

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 19/1. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — BUE
8 Feb — 15 Feb1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from London Heathrow to Buenos Aires are usually found in February or September, booked 90 days in advance, depart on a Monday or Thursday 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 9 January 2026.

Round-trip from

£817

One-way from

£456

Popular in

December

Cheapest in

February

Average price

£926

Good round-trip deal

£966 or less
Air Canada
  • Air Canada
  • 11/5-25/5
  • 5 total stops
  • 84h 50m total
  • London to Buenos Aires
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19/1
  • 19/1
  • 2 total stops
  • 28h 00m total
  • London to Buenos Aires
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (£54 potential increase over avg. return price).
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Cheapest flight prices on average. 3% potential price decrease (£27 potential savings vs. average return price).
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Average for round-trip flights in January 2026
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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 9 January 2026.

Sat 31/1018:00LHR - EZE
2 stops24h 10mAir Canada
Sun 8/1116:45EZE - LHR
2 stops34h 45mAir Canada
Deal found 8/1£817
Wed 8/408:30LHR - EZE
2 stops34h 00mAir Canada
Wed 15/416:30EZE - LHR
2 stops39h 20mAir Canada
Deal found 8/1£818
Wed 4/1115:45LHR - EZE
1 stop18h 00mMultiple Airlines
Sun 22/1113:25EZE - LHR
1 stop22h 30mMultiple Airlines
Deal found 8/1£819
Wed 4/1113:25LHR - EZE
3 stops52h 45mAir Canada
Sat 14/1116:45EZE - LHR
2 stops34h 45mAir Canada
Deal found 8/1£820
Thu 29/1012:00LHR - EZE
3 stops30h 10mAir Canada
Sun 15/1116:45EZE - LHR
2 stops39h 35mAir Canada
Deal found 7/1£820
Fri 2/1011:10LHR - EZE
2 stops39h 15mTurkish Airlines
Tue 20/1023:55EZE - LHR
2 stops35h 15mTurkish Airlines
Deal found 7/1£821
Sat 6/620:00LHR - EZE
1 stop24h 25mBritish Airways
Wed 17/612:25EZE - LHR
1 stop15h 45mBritish Airways
Deal found 7/1£822
Wed 15/408:30LHR - EZE
2 stops34h 00mAir Canada
Thu 23/416:30EZE - LHR
3 stops37h 30mAir Canada
Deal found 7/1£823
Thu 15/106:20LHR - EZE
1 stop17h 00mAir France
Wed 4/222:40EZE - LHR
1 stop19h 45mAir France
Deal found 8/1£823
Thu 16/416:45LHR - EZE
2 stops33h 40mTurkish Airlines
Sun 3/523:55EZE - LHR
2 stops41h 05mTurkish Airlines
Deal found 7/1£824
Sat 6/606:30LHR - EZE
2 stops43h 55mTurkish Airlines
Sat 20/623:55EZE - LHR
2 stops35h 15mTurkish Airlines
Deal found 8/1£825
Mon 16/322:35LHR - EZE
2 stops26h 50mTurkish Airlines
Sun 29/323:55EZE - LHR
2 stops35h 15mTurkish Airlines
Deal found 8/1£826

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 9 January 2026.
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

Sat 14/3

22:35-22:25

2 stops26h 50m

Buenos Aires Ministro Pistarini

Fri 27/3

23:55-14:10

2 stops35h 15m

£835

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Wed 3/6

21:45-10:45

1 stop17h 00m

Buenos Aires Ministro Pistarini

Fri 19/6

12:25-08:10

1 stop15h 45m

£840

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Thu 4/6

08:30-06:25

1 stop25h 55m

Buenos Aires Ministro Pistarini

Wed 17/6

13:30-13:00

2 stops19h 30m

£858

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Thu 12/3

21:40-05:40

1 stop35h 00m

Buenos Aires Jorge Newbery

Sun 29/3

07:00-15:35

1 stop28h 35m

£864

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Mon 8/6

22:35-22:25

2 stops27h 50m

Buenos Aires Ministro Pistarini

Mon 15/6

23:55-09:35

2 stops29h 40m

£864

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Tue 24/2

18:40-11:50

2 stops20h 10m

Buenos Aires Ministro Pistarini

Sat 28/11

02:20-13:00

2 stops31h 40m

£873

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Tue 24/2

18:40-11:50

2 stops20h 10m

Buenos Aires Ministro Pistarini

Thu 26/11

02:20-13:00

2 stops31h 40m

£873

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Wed 25/2

20:15-09:40

1 stop16h 25m

Buenos Aires Jorge Newbery

Tue 10/3

14:55-14:05

1 stop20h 10m

£874

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Mon 8/6

18:25-22:25

2 stops32h 00m

Buenos Aires Ministro Pistarini

Sun 14/6

23:55-09:35

2 stops29h 40m

£875

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Thu 4/6

18:00-22:25

2 stops32h 25m

Buenos Aires Ministro Pistarini

Sun 14/6

23:55-09:35

2 stops29h 40m

£875

Flights are sorted by cheapest return flights first.

Deals found on 8/1

Showing 1-10 of 41 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 2 January 2026.

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, September is the cheapest month in which you can book a flight from London Heathrow Airport to Buenos Aires (average of £655). Flying from London Heathrow Airport to Buenos Aires in July is currently the most expensive (average of £905). 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 9 January 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London Heathrow Airport to Buenos Aires as you normally would.

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 9 January 2026.

The most flights from LHR to BUE are scheduled on a Monday (3 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (3 on average).

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 26% 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 £755.

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 Rio de Janeiro (GIG) have the shortest average one-way travel time for one-stop routes: 16h 38m.

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 Rio de Janeiro (GIG) offer the fastest connection on this route, with an average stopover time of 1h 36m.

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 9 January 2026.
Read through reviews of airlines operating flights from London Heathrow Airport to Buenos Aires, such as LATAM Airlines, Air France, andIberia. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
LATAM Airlines
7.5
Good
1,898 reviews
Check prices

Entertainment

7.0

Boarding

7.6

Food

6.7

Overall

7.5

Comfort

7.3

Crew

8.0

Reviews

1 / 20
2.0
Mediocre

JC,Jan 2026

FLN - GRU

Plane was late in FLN and missed connection in GRU. No alternative was given to me until 6 hours later and I was delayed by over 12 hours total.
LATAM Airlines
7.5
Good
1,898 reviews
LATAM Airlines
7.5
Good
1,898 reviews
Check prices

Entertainment

7.0

Boarding

7.6

Food

6.7

Overall

7.5

Comfort

7.3

Crew

8.0

Reviews

1 / 20
2.0
Mediocre

JC,Jan 2026

FLN - GRU

Plane was late in FLN and missed connection in GRU. No alternative was given to me until 6 hours later and I was delayed by over 12 hours total.
Air France
7.4
Good
1,519 reviews
LATAM Airlines
7.5
Good
1,898 reviews
Check prices

Entertainment

7.0

Boarding

7.6

Food

6.7

Overall

7.5

Comfort

7.3

Crew

8.0

Reviews

1 / 20
2.0
Mediocre

JC,Jan 2026

FLN - GRU

Plane was late in FLN and missed connection in GRU. No alternative was given to me until 6 hours later and I was delayed by over 12 hours total.
Iberia
7.0
Good
3,079 reviews
LATAM Airlines
7.5
Good
1,898 reviews
Check prices

Entertainment

7.0

Boarding

7.6

Food

6.7

Overall

7.5

Comfort

7.3

Crew

8.0

Reviews

1 / 20
2.0
Mediocre

JC,Jan 2026

FLN - GRU

Plane was late in FLN and missed connection in GRU. No alternative was given to me until 6 hours later and I was delayed by over 12 hours total.
Lufthansa
6.8
Okay
7,697 reviews
LATAM Airlines
7.5
Good
1,898 reviews
Check prices

Entertainment

7.0

Boarding

7.6

Food

6.7

Overall

7.5

Comfort

7.3

Crew

8.0

Reviews

1 / 20
2.0
Mediocre

JC,Jan 2026

FLN - GRU

Plane was late in FLN and missed connection in GRU. No alternative was given to me until 6 hours later and I was delayed by over 12 hours total.
British Airways
6.7
Okay
7,657 reviews
LATAM Airlines
7.5
Good
1,898 reviews
Check prices

Entertainment

7.0

Boarding

7.6

Food

6.7

Overall

7.5

Comfort

7.3

Crew

8.0

Reviews

1 / 20
2.0
Mediocre

JC,Jan 2026

FLN - GRU

Plane was late in FLN and missed connection in GRU. No alternative was given to me until 6 hours later and I was delayed by over 12 hours total.

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 17h. Turkish Airlines provides one of the quickest options available for as low as £840. 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 Avianca. Our recent data shows that you can find tickets from as low as £699 on this airline. Additional options worth looking into are Iberia and Finnair, starting at £717 and £753 round-trip. Avianca is 30% 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?

    £374 is the cheapest one-way deal found within the past few days, from Avianca. You may also be able to find cheap deals on Iberia and LATAM Airlines, with prices starting from £543 and £598, respectively.

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

    Looking at all options, your cheapest flight can be booked for £948. While the most popular route (London Heathrow - Buenos Aires Ministro Pistarini) can be booked for £559 on average, our data indicates £1,088 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, September is the cheapest month in which you can book a flight from London Heathrow Airport to Buenos Aires (average of £655). Flying from London Heathrow Airport to Buenos Aires in July is currently the most expensive (average of £905). 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 9 January 2026.
AirlineCheapestAverageFlexibilityOn-time
AviancaCheapest£699Average£796FlexibilityNo cancel feeOn-time71%
Search Avianca flights
IberiaCheapest£717Average£903FlexibilityNo cancel feeOn-time77%
Search Iberia flights
FinnairCheapest£753Average£1,089FlexibilityNo cancel feeOn-time76%
Search Finnair flights
Air FranceCheapest£767Average£1,350FlexibilityNo cancel feeOn-time77%
Search Air France flights
British AirwaysCheapest£804Average£1,117FlexibilityNo cancel feeOn-time70%
Search British Airways flights
American AirlinesCheapest£866Average£970FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
LufthansaCheapest£889Average£1,225FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
LATAM AirlinesCheapest£904Average£1,045FlexibilityNo 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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