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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 4/2. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — BUE
2 Jan — 9 Jan1
1 adult
1 adult, Economy, 0 bags

Cheapflights Tip: The best prices from London Heathrow to Buenos Aires are usually found in February or March, booked 90 days in advance, depart on a Monday or Tuesday and return on a Monday

Cheap 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 3 December 2025.

Tue 2/1220:25LHR - EZE
2 stops26h 55mKLM
Tue 9/1216:25EZE - LHR
1 stop18h 25mKLM
Deal found 1/12£811
Fri 12/1208:20LHR - EZE
1 stop26h 45mAmerican Airlines
Sat 24/120:45EZE - LHR
1 stop22h 25mAmerican Airlines
Deal found 2/12£874
Sun 7/1212:10LHR - EZE
1 stop21h 55mAmerican Airlines
Wed 10/1223:59EZE - LHR
1 stop29h 16mAmerican Airlines
Deal found 2/12£876
Thu 4/1217:00LHR - EZE
1 stop20h 40mAmerican Airlines
Tue 9/1222:30EZE - LHR
1 stop29h 20mAmerican Airlines
Deal found 2/12£877
Wed 3/1206:20LHR - EZE
1 stop17h 00mAir France
Tue 16/1222:40EZE - LHR
1 stop16h 40mAir France
Deal found 2/12£878
Wed 3/1211:15LHR - EZE
1 stop24h 55mAmerican Airlines
Thu 11/1210:10EZE - LHR
2 stops22h 50mAmerican Airlines
Deal found 2/12£880
Tue 2/1206:20LHR - AEP
2 stops21h 20mMultiple Airlines
Tue 9/1206:00AEP - LHR
2 stops31h 35mMultiple Airlines
Deal found 1/12£902
Tue 2/1220:25LHR - EZE
2 stops26h 55mMultiple Airlines
Tue 16/1222:40EZE - LHR
1 stop16h 40mMultiple Airlines
Deal found 2/12£902
Wed 31/1217:25LHR - EZE
1 stop27h 30mBritish Airways
Fri 17/413:00EZE - LHR
1 stop23h 20mBritish Airways
Deal found 1/12£909
Wed 3/1206:20LHR - EZE
1 stop17h 00mAir France
Wed 17/1222:40EZE - LHR
1 stop16h 40mAir France
Deal found 2/12£918
Wed 10/1209:40LHR - EZE
2 stops24h 40mDelta
Mon 26/123:55EZE - LHR
2 stops29h 50mDelta
Deal found 2/12£923
Tue 2/1209:40LHR - EZE
2 stops26h 20mDelta
Tue 9/1222:25EZE - LHR
2 stops31h 20mDelta
Deal found 1/12£924

Find 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 3 December 2025.

Round-trip from

£806

One-way from

£456

Popular in

December

Cheapest in

February

Average price

£1,388

Good round-trip deal

£1,143 or less

Good one-way deal

£793 or less
Lufthansa
  • Lufthansa
  • 2/2-17/2
  • 3 total stops
  • 53h 05m total
  • London to Buenos Aires
Search Deals
4/2
  • 4/2
  • 2 total stops
  • 35h 35m total
  • London to Buenos Aires
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (£64 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£27 potential savings vs. average return price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from London Heathrow to Buenos Aires (BUE).
Search Deals
Price to beat on a one-way flight from London Heathrow to Buenos Aires (BUE).
Search Deals

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 3 December 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

Sat 24/1

10:00-07:20

1 stop24h 20m

Buenos Aires Ministro Pistarini

Sun 15/2

23:55-07:30

1 stop28h 35m

£840

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Sun 15/2

12:05-09:20

1 stop24h 15m

Buenos Aires Ministro Pistarini

Wed 25/2

23:55-07:30

1 stop28h 35m

£840

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Wed 4/2

16:20-09:20

2 stops44h 00m

Buenos Aires Ministro Pistarini

Wed 18/2

23:55-08:25

2 stops29h 30m

£840

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Wed 11/2

19:40-17:55

1 stop25h 15m

Buenos Aires Ministro Pistarini

Tue 17/2

22:45-18:50

1 stop17h 05m

£859

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Sun 15/3

22:35-22:25

2 stops26h 50m

Buenos Aires Ministro Pistarini

Sun 29/3

23:55-15:20

2 stops35h 25m

£874

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Wed 21/1

17:25-16:00

2 stops25h 35m

Buenos Aires Jorge Newbery

Sun 8/2

14:55-14:05

1 stop20h 10m

£881

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Tue 20/1

19:05-16:00

2 stops23h 55m

Buenos Aires Jorge Newbery

Tue 10/2

10:35-14:05

1 stop24h 30m

£881

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Mon 16/2

12:05-07:20

1 stop22h 15m

Buenos Aires Ministro Pistarini

Wed 25/2

22:05-05:55

2 stops28h 50m

£890

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Thu 5/2

12:05-07:20

1 stop22h 15m

Buenos Aires Ministro Pistarini

Sat 21/2

22:05-07:30

1 stop30h 25m

£893

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Thu 26/2

20:15-09:40

1 stop16h 25m

Buenos Aires Jorge Newbery

Wed 4/3

18:20-14:05

1 stop16h 45m

£896

Flights are sorted by cheapest return flights first.

Deals found on 1/12

Showing 1-10 of 42 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 28 November 2025.

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, December is the cheapest month in which you can book a flight from London Heathrow Airport to Buenos Aires (average of £570). Flying from London Heathrow Airport to Buenos Aires in July is currently the most expensive (average of £904). 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 3 December 2025.

It’s typically best to fly out from London Heathrow Airport to Buenos Aires in the morning. Doing so could potentially save you 25% on the flight price compared to flying in the evening, which is usually more expensive.

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 3 December 2025.

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).

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.

Frankfurt am Main (FRA) – chosen by Cheapflights users on 24% 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 £768.

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 Amsterdam (AMS) have the shortest average one-way travel time for one-stop routes: 16h 25m.

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 Amsterdam (AMS) offer the fastest connection on this route, with an average stopover time of 1h 34m.

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 3 December 2025.
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
1,334 reviews
Check prices

Crew

8.1

Comfort

7.4

Entertainment

6.9

Food

6.7

Boarding

7.6

Overall

7.6

Reviews

1 / 20
4.0
Okay

Anonymous,Sept 2025

WAW - HEL

My flight to Europe was cancelled and rebooked. Bags got lost by FinnAir. Flight back home from Europe was cancelled the very next day after we landed. Zero compensation for these back to back cancellations on the exact same trip. Kayak doesn’t help with flight cancellation before trips says to contact trip protection only for trip protection to say it’s up to kayak. Don’t fly FinnAir.
Finnair
7.6
Good
1,334 reviews
Finnair
7.6
Good
1,334 reviews
Check prices

Crew

8.1

Comfort

7.4

Entertainment

6.9

Food

6.7

Boarding

7.6

Overall

7.6

Reviews

1 / 20
4.0
Okay

Anonymous,Sept 2025

WAW - HEL

My flight to Europe was cancelled and rebooked. Bags got lost by FinnAir. Flight back home from Europe was cancelled the very next day after we landed. Zero compensation for these back to back cancellations on the exact same trip. Kayak doesn’t help with flight cancellation before trips says to contact trip protection only for trip protection to say it’s up to kayak. Don’t fly FinnAir.
LATAM Airlines
7.5
Good
1,890 reviews
Finnair
7.6
Good
1,334 reviews
Check prices

Crew

8.1

Comfort

7.4

Entertainment

6.9

Food

6.7

Boarding

7.6

Overall

7.6

Reviews

1 / 20
4.0
Okay

Anonymous,Sept 2025

WAW - HEL

My flight to Europe was cancelled and rebooked. Bags got lost by FinnAir. Flight back home from Europe was cancelled the very next day after we landed. Zero compensation for these back to back cancellations on the exact same trip. Kayak doesn’t help with flight cancellation before trips says to contact trip protection only for trip protection to say it’s up to kayak. Don’t fly FinnAir.
Iberia
7.0
Good
3,038 reviews
Finnair
7.6
Good
1,334 reviews
Check prices

Crew

8.1

Comfort

7.4

Entertainment

6.9

Food

6.7

Boarding

7.6

Overall

7.6

Reviews

1 / 20
4.0
Okay

Anonymous,Sept 2025

WAW - HEL

My flight to Europe was cancelled and rebooked. Bags got lost by FinnAir. Flight back home from Europe was cancelled the very next day after we landed. Zero compensation for these back to back cancellations on the exact same trip. Kayak doesn’t help with flight cancellation before trips says to contact trip protection only for trip protection to say it’s up to kayak. Don’t fly FinnAir.
Lufthansa
6.8
Okay
7,607 reviews
Finnair
7.6
Good
1,334 reviews
Check prices

Crew

8.1

Comfort

7.4

Entertainment

6.9

Food

6.7

Boarding

7.6

Overall

7.6

Reviews

1 / 20
4.0
Okay

Anonymous,Sept 2025

WAW - HEL

My flight to Europe was cancelled and rebooked. Bags got lost by FinnAir. Flight back home from Europe was cancelled the very next day after we landed. Zero compensation for these back to back cancellations on the exact same trip. Kayak doesn’t help with flight cancellation before trips says to contact trip protection only for trip protection to say it’s up to kayak. Don’t fly FinnAir.
British Airways
6.7
Okay
7,553 reviews
Finnair
7.6
Good
1,334 reviews
Check prices

Crew

8.1

Comfort

7.4

Entertainment

6.9

Food

6.7

Boarding

7.6

Overall

7.6

Reviews

1 / 20
4.0
Okay

Anonymous,Sept 2025

WAW - HEL

My flight to Europe was cancelled and rebooked. Bags got lost by FinnAir. Flight back home from Europe was cancelled the very next day after we landed. Zero compensation for these back to back cancellations on the exact same trip. Kayak doesn’t help with flight cancellation before trips says to contact trip protection only for trip protection to say it’s up to kayak. Don’t fly FinnAir.

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 24h 20m. United 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 Air France. Our recent data shows that you can find tickets from as low as £454 on this airline. Additional options worth looking into are Avianca and Iberia, starting at £711 and £733 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 airlines to fly from London Heathrow Airport to Buenos Aires one-way?

    £381 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 £553 and £609, respectively.

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

    Looking at all options, your cheapest flight can be booked for £745. While the most popular route (London Heathrow - Buenos Aires Ministro Pistarini) can be booked for £718 on average, our data indicates £1,366 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, December is the cheapest month in which you can book a flight from London Heathrow Airport to Buenos Aires (average of £570). Flying from London Heathrow Airport to Buenos Aires in July is currently the most expensive (average of £904). 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 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 3 December 2025.
AirlineCheapestAverageFlexibilityOn-time
Air FranceCheapest£454Average£1,126FlexibilityNo cancel feeOn-time77%
Search Air France flights
AviancaCheapest£711Average£810FlexibilityNo cancel feeOn-time71%
Search Avianca flights
IberiaCheapest£733Average£922FlexibilityNo cancel feeOn-time77%
Search Iberia flights
FinnairCheapest£748Average£1,104FlexibilityNo cancel feeOn-time76%
Search Finnair flights
British AirwaysCheapest£819Average£1,116FlexibilityNo cancel feeOn-time70%
Search British Airways flights
LufthansaCheapest£833Average£1,257FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
LATAM AirlinesCheapest£886Average£1,047FlexibilityNo cancel feeOn-time81%
Search LATAM Airlines flights
American AirlinesCheapest£890Average£1,028FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
KLMCheapest£1,040Average£1,388FlexibilityNo cancel feeOn-time75%
Search KLM 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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