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Cheap flights from London Heathrow Airport to Buenos Aires from £453

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 15/4. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — BUE
16 Mar — 23 Mar1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from London Heathrow to Buenos Aires are usually found in September or November, booked 82 days in advance, depart on a Monday or Wednesday 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 14 February 2026.

Mon 29/621:20
LHR
-
AEP
1 stop18h 40m
LATAM Airlines
Thu 30/718:20
AEP
-
LHR
1 stop16h 45m
LATAM Airlines
Deal found 14/2£743
Sun 28/621:20
LHR
-
AEP
1 stop18h 40m
LATAM Airlines
Sun 2/818:20
AEP
-
LHR
1 stop16h 45m
LATAM Airlines
Deal found 14/2£750
Tue 3/312:05
LHR
-
EZE
1 stop24h 15m
Lufthansa
Thu 19/321:05
EZE
-
LHR
1 stop31h 25m
Lufthansa
Deal found 14/2£751
Wed 18/310:00
LHR
-
EZE
1 stop25h 20m
Lufthansa
Mon 23/321:05
EZE
-
LHR
1 stop31h 25m
Lufthansa
Deal found 13/2£751
Tue 17/212:05
LHR
-
EZE
1 stop24h 15m
Lufthansa
Tue 24/223:55
EZE
-
LHR
1 stop28h 35m
Lufthansa
Deal found 10/2£752
Wed 25/210:00
LHR
-
EZE
1 stop26h 20m
Lufthansa
Sun 1/322:05
EZE
-
LHR
1 stop33h 10m
Lufthansa
Deal found 11/2£753
Wed 6/509:30
LHR
-
EZE
1 stop24h 55m
Multiple Airlines
Wed 10/613:30
EZE
-
LHR
2 stops19h 30m
Multiple Airlines
Deal found 13/2£754
Wed 2/922:05
LHR
-
EZE
1 stop35h 35m
Avianca
Wed 16/907:10
EZE
-
LHR
1 stop28h 25m
Avianca
Deal found 10/2£755
Mon 7/922:05
LHR
-
EZE
1 stop30h 20m
Avianca
Thu 17/916:50
EZE
-
LHR
1 stop18h 45m
Avianca
Deal found 12/2£757
Mon 4/512:40
LHR
-
EZE
3 stops53h 50m
Air Canada
Mon 18/516:35
EZE
-
LHR
2 stops36h 00m
Air Canada
Deal found 11/2£761
Wed 1/721:20
LHR
-
AEP
1 stop16h 20m
LATAM Airlines
Thu 30/718:20
AEP
-
LHR
1 stop16h 45m
LATAM Airlines
Deal found 14/2£762
Sat 4/413:40
LHR
-
EZE
1 stop22h 20m
Lufthansa
Wed 8/421:00
EZE
-
LHR
1 stop30h 40m
Lufthansa
Deal found 13/2£762

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 14 February 2026.

Round-trip from

£751

One-way from

£453

Popular in

December

Cheapest in

September

Average price

£958

Good round-trip deal

£907 or less
Lufthansa
  • Lufthansa
  • 18/3-25/3
  • 2 total stops
  • 57h 30m total
  • London to Buenos Aires
Search Deals
15/4
  • 15/4
  • 2 total stops
  • 36h 50m total
  • London to Buenos Aires
Search Deals
Highest demand for flights based on searches. 5% potential increase in price (£45 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£25 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2026
Search Deals
Price to beat on a round-trip 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 14 February 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

Wed 6/5

09:30-06:25

1 stop24h 55m

Buenos Aires Ministro Pistarini

Thu 28/5

16:35-20:40

1 stop24h 05m

£761

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Tue 9/6

22:05-15:40

1 stop21h 35m

Buenos Aires Ministro Pistarini

Wed 24/6

07:10-15:35

1 stop28h 25m

£771

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Tue 9/6

22:05-15:40

1 stop21h 35m

Buenos Aires Ministro Pistarini

Mon 22/6

16:50-15:35

1 stop18h 45m

£771

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Sat 7/3

12:05-09:20

1 stop24h 15m

Buenos Aires Ministro Pistarini

Mon 23/3

22:55-07:30

1 stop29h 35m

£782

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Tue 3/3

10:00-09:20

1 stop26h 20m

Buenos Aires Ministro Pistarini

Thu 12/3

22:55-10:50

2 stops56h 55m

£783

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Mon 2/3

12:05-09:20

1 stop24h 15m

Buenos Aires Ministro Pistarini

Wed 18/3

21:05-06:20

2 stops30h 15m

£783

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Sun 1/3

12:05-07:20

1 stop22h 15m

Buenos Aires Ministro Pistarini

Mon 16/3

21:05-06:20

2 stops30h 15m

£783

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Tue 3/3

09:10-07:20

2 stops25h 10m

Buenos Aires Ministro Pistarini

Mon 16/3

21:05-05:55

2 stops29h 50m

£783

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Wed 10/6

22:05-05:40

1 stop35h 35m

Buenos Aires Jorge Newbery

Fri 26/6

07:00-15:35

1 stop28h 35m

£812

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Mon 8/6

22:05-05:40

1 stop35h 35m

Buenos Aires Jorge Newbery

Fri 26/6

07:00-15:35

1 stop28h 35m

£812

Flights are sorted by cheapest return flights first.

Deals found on 13/2

Showing 1-10 of 43 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 13 February 2026.

Booking 82 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 £644). Flying from London Heathrow Airport to Buenos Aires in July is currently the most expensive (average of £983). 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 14 February 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 14 February 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 27% 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 £762.

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 Madrid (MAD) 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 Frankfurt am Main (FRA) offer the fastest connection on this route, with an average stopover time of 1h 11m.

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 14 February 2026.
Read through reviews of airlines operating flights from London Heathrow Airport to Buenos Aires, such as LATAM Airlines, Iberia, andLufthansa. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
LATAM Airlines
7.5
Good
1,920 reviews
Check prices

Comfort

7.3

Overall

7.5

Crew

8.0

Food

6.7

Entertainment

7.0

Boarding

7.5

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
1,920 reviews
LATAM Airlines
7.5
Good
1,920 reviews
Check prices

Comfort

7.3

Overall

7.5

Crew

8.0

Food

6.7

Entertainment

7.0

Boarding

7.5

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
3,115 reviews
LATAM Airlines
7.5
Good
1,920 reviews
Check prices

Comfort

7.3

Overall

7.5

Crew

8.0

Food

6.7

Entertainment

7.0

Boarding

7.5

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
7,785 reviews
LATAM Airlines
7.5
Good
1,920 reviews
Check prices

Comfort

7.3

Overall

7.5

Crew

8.0

Food

6.7

Entertainment

7.0

Boarding

7.5

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
7,739 reviews
LATAM Airlines
7.5
Good
1,920 reviews
Check prices

Comfort

7.3

Overall

7.5

Crew

8.0

Food

6.7

Entertainment

7.0

Boarding

7.5

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.
Avianca
6.6
Okay
2,495 reviews
LATAM Airlines
7.5
Good
1,920 reviews
Check prices

Comfort

7.3

Overall

7.5

Crew

8.0

Food

6.7

Entertainment

7.0

Boarding

7.5

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 21h 35m. Lufthansa provides one of the quickest options available for as low as £771. 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 £682 on this airline. Additional options worth looking into are Iberia and Finnair, starting at £707 and £743 round-trip. Avianca is 31% 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?

    £369 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 £568 and £590, respectively.

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

    Looking at all options, your cheapest flight can be booked for £898. While the most popular route (London Heathrow - Buenos Aires Ministro Pistarini) can be booked for £700 on average, our data indicates £1,016 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 £644). Flying from London Heathrow Airport to Buenos Aires in July is currently the most expensive (average of £983). 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 14 February 2026.
AirlineCheapestAverageFlexibilityOn-time
AviancaCheapest£682Average£785FlexibilityNo cancel feeOn-time71%
Search Avianca flights
IberiaCheapest£707Average£892FlexibilityNo cancel feeOn-time77%
Search Iberia flights
FinnairCheapest£743Average£1,074FlexibilityNo cancel feeOn-time76%
Search Finnair flights
Air FranceCheapest£757Average£1,332FlexibilityNo cancel feeOn-time77%
Search Air France flights
British AirwaysCheapest£819Average£1,138FlexibilityNo cancel feeOn-time70%
Search British Airways flights
American AirlinesCheapest£855Average£883FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
LufthansaCheapest£895Average£1,212FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
LATAM AirlinesCheapest£907Average£1,007FlexibilityNo 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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