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Cheap flights from London to Buenos Aires from £450

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.
LON — BUE
5 Jan — 12 Jan1
1 adult
1 adult, Economy, 0 bags

Cheapflights Tip: The best prices from London to Buenos Aires are usually found in September or March, booked 10 days in advance, depart on a Monday or Tuesday and return on a Monday

Cheap flight deals from London to Buenos Aires

Enter your travel dates to find the best prices.

Cheapest flights from London to Buenos Aires
Explore the most affordable flight options available from London to Buenos Aires. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 6 December 2025.

Tue 30/1206:25LGW - EZE
2 stops43h 00mTurkish Airlines
Mon 18/523:55EZE - LGW
2 stops36h 25mTurkish Airlines
Deal found 5/12£825
Thu 4/1210:00LCY - EZE
2 stops37h 20mKLM
Thu 11/1216:25EZE - LCY
1 stop21h 10mKLM
Deal found 3/12£833
Mon 29/1206:20LGW - EZE
2 stops43h 05mTurkish Airlines
Mon 18/523:55EZE - LGW
2 stops36h 25mTurkish Airlines
Deal found 5/12£835
Thu 11/1211:25LHR - EZE
2 stops25h 50mAmerican Airlines
Thu 5/223:20EZE - LHR
2 stops28h 00mAmerican Airlines
Deal found 5/12£856
Sun 7/1211:15LHR - EZE
1 stop26h 00mAmerican Airlines
Sun 14/1221:40EZE - LHR
1 stop35h 25mAmerican Airlines
Deal found 3/12£863
Sat 6/1211:30LCY - AEP
2 stops29h 00mMultiple Airlines
Fri 12/1204:15AEP - LCY
2 stops32h 55mMultiple Airlines
Deal found 5/12£864
Fri 12/1208:20LHR - EZE
1 stop26h 45mAmerican Airlines
Sat 24/120:45EZE - LHR
1 stop35h 30mAmerican Airlines
Deal found 3/12£864
Thu 4/1217:00LHR - EZE
1 stop20h 40mAmerican Airlines
Thu 11/1220:30EZE - LHR
1 stop22h 40mAmerican Airlines
Deal found 3/12£866
Thu 11/1211:25LHR - EZE
2 stops25h 50mAmerican Airlines
Wed 4/210:10EZE - LHR
2 stops28h 05mAmerican Airlines
Deal found 5/12£867
Thu 4/1211:15LHR - EZE
1 stop24h 55mAmerican Airlines
Tue 9/1222:30EZE - LHR
1 stop29h 20mAmerican Airlines
Deal found 3/12£867
Sun 7/1216:30LHR - EZE
1 stop42h 35mBritish Airways
Mon 15/1210:10EZE - LHR
1 stop22h 55mBritish Airways
Deal found 3/12£868
Tue 9/1215:35LHR - EZE
1 stop22h 05mAmerican Airlines
Thu 29/120:45EZE - LHR
1 stop22h 25mAmerican Airlines
Deal found 5/12£871

Find flight deals from London to Buenos Aires

Discover tips and strategies to find the most affordable flight options for your journey from London (LON) 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 6 December 2025.

Round-trip from

£810

One-way from

£450

Popular in

December

Cheapest in

September

Average price

£1,280

Good round-trip deal

£1,132 or less

Good one-way deal

£785 or less
Air Canada
  • Air Canada
  • 5/5-21/5
  • 4 total stops
  • 71h 00m total
  • London to Buenos Aires
Search Deals
15/4
  • 15/4
  • 2 total stops
  • 26h 30m total
  • London to Buenos Aires
Search Deals
Highest demand for flights based on searches. 5% potential increase in price (£44 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£22 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 (LON) to Buenos Aires (BUE).
Search Deals
Price to beat on a one-way flight from London (LON) to Buenos Aires (BUE).
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from London 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 6 December 2025.
Use the filters below to find and compare flights from London to Buenos Aires that are best for you.

Fly from

London

Fly to

Buenos Aires

Route

Depart

Return

Price

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Mon 13/4

13:15-22:25

2 stops37h 10m

Buenos Aires Ministro Pistarini

Thu 23/4

23:55-16:55

2 stops37h 00m

£817

LondonBuenos Aires

LGW - EZE

LGWEZE

London Gatwick

Mon 23/2

17:05-22:25

2 stops56h 20m

Buenos Aires Ministro Pistarini

Wed 25/3

23:55-16:10

2 stops37h 15m

£828

LondonBuenos Aires

STN - EZE

STNEZE

London Stansted

Tue 14/4

17:45-22:25

2 stops32h 40m

Buenos Aires Ministro Pistarini

Wed 22/4

23:55-10:15

2 stops30h 20m

£828

LondonBuenos Aires

LGW - EZE

LGWEZE

London Gatwick

Sun 18/1

06:20-22:25

2 stops43h 05m

Buenos Aires Ministro Pistarini

Mon 2/2

23:55-22:35

2 stops43h 40m

£830

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Sat 24/1

10:00-07:20

1 stop24h 20m

Buenos Aires Ministro Pistarini

Tue 17/2

23:55-07:30

1 stop28h 35m

£835

LondonBuenos Aires

LGW - EZE

LGWEZE

London Gatwick

Thu 5/3

19:40-17:25

1 stop24h 45m

Buenos Aires Ministro Pistarini

Mon 16/3

14:20-10:50

1 stop17h 30m

£846

LondonBuenos Aires

LGW - EZE

LGWEZE

London Gatwick

Thu 30/4

10:00-07:40

1 stop25h 40m

Buenos Aires Ministro Pistarini

Mon 18/5

12:10-16:25

1 stop24h 15m

£854

LondonBuenos Aires

LGW - AEP

LGWAEP

London Gatwick

Tue 14/4

07:20-05:40

2 stops26h 20m

Buenos Aires Jorge Newbery

Tue 21/4

07:00-12:15

2 stops25h 15m

£867

LondonBuenos Aires

LGW - EZE

LGWEZE

London Gatwick

Sun 15/3

10:00-08:50

1 stop25h 50m

Buenos Aires Ministro Pistarini

Mon 23/3

13:15-16:25

1 stop24h 10m

£867

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Tue 14/4

10:30-07:30

1 stop25h 00m

Buenos Aires Ministro Pistarini

Tue 21/4

00:50-09:40

1 stop28h 50m

£869

Flights are sorted by cheapest return flights first.

Deals found on 4/12

Showing 1-10 of 60 results
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Best time to book a flight from London to Buenos Aires

Have a flexible travel schedule? Discover the best time to fly to Buenos Aires from London 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 to Buenos Aires

How far ahead should I book a flight from London to Buenos Aires?

Use this chart to determine the optimal time to book a return flight from London to Buenos Aires. Price data was last updated on 28 November 2025.

The price you pay for your flight from London to Buenos Aires may vary depending on when you book. For the best chance of a lower fare, look to book 10 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from London to Buenos Aires?

Currently, December is the cheapest month in which you can book a flight from London to Buenos Aires (average of £565). Flying from London to Buenos Aires in July is currently the most expensive (average of £895). 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 LON to BUE?

Find hourly flight availability from London 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 6 December 2025.

It’s optimal to fly from London to Buenos Aires in the morning. By choosing this option you can save up to 14% on the cost of your flight, compared to a flight in the evening.

Weekly flight availability from London to Buenos Aires

Explore weekly flight availability from London 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 6 December 2025.

The most flights from LON 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 to Buenos Aires?

What’s the top stopover airport for flights from London to Buenos Aires?

Share of one-stop return flights from London to Buenos Aires chosen by Cheapflights users in the past 12 months, using the same stopover each way.

Madrid (MAD) – chosen by Cheapflights users on 35% of one-stop itineraries from London to Buenos Aires on Cheapflights.

What’s the cheapest stopover airport for flights from London to Buenos Aires?

Average return fare for one-stop flights from London 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 £761.

What’s the fastest stopover option from London to Buenos Aires?

Shortest average travel time for one-stop one-way flights from London 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 16m.

Which airport typically offers the quickest stopover for flights from London to Buenos Aires?

Average stopover duration for one-stop one-way flights from London to Buenos Aires, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Barcelona (BCN) offer the fastest connection on this route, with an average stopover time of 1h 23m.

How often are flights from London to Buenos Aires delayed?

About 0% of weekly flights between London and Buenos Aires have experienced delays in the past year, with the average delay time being 0 minutes.

What is the most punctual flight time for London to Buenos Aires flights?

Historically, flights departing in the evening are less likely to be delayed, whereas flights leaving at night tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Thursday tends to have the lowest number of delays on this route, whereas Sunday has historically faced a higher average of delays compared to other days of the week.

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 6 December 2025.
Check out reviews from past customers who have flown with LATAM Airlines, Air Europa, andIberia from London to Buenos Aires to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
LATAM Airlines
7.5
Good
1,890 reviews
Check prices

Boarding

7.6

Comfort

7.4

Overall

7.5

Food

6.7

Crew

8.0

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

LUIS JOSE,Oct 2025

LIM - AEP

Smiles because se upgraded to premiums economy. That was similar to LAN economy years ahí!
LATAM Airlines
7.5
Good
1,890 reviews
LATAM Airlines
7.5
Good
1,890 reviews
Check prices

Boarding

7.6

Comfort

7.4

Overall

7.5

Food

6.7

Crew

8.0

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

LUIS JOSE,Oct 2025

LIM - AEP

Smiles because se upgraded to premiums economy. That was similar to LAN economy years ahí!
Air Europa
7.0
Good
569 reviews
LATAM Airlines
7.5
Good
1,890 reviews
Check prices

Boarding

7.6

Comfort

7.4

Overall

7.5

Food

6.7

Crew

8.0

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

LUIS JOSE,Oct 2025

LIM - AEP

Smiles because se upgraded to premiums economy. That was similar to LAN economy years ahí!
Iberia
7.0
Good
3,040 reviews
LATAM Airlines
7.5
Good
1,890 reviews
Check prices

Boarding

7.6

Comfort

7.4

Overall

7.5

Food

6.7

Crew

8.0

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

LUIS JOSE,Oct 2025

LIM - AEP

Smiles because se upgraded to premiums economy. That was similar to LAN economy years ahí!
Lufthansa
6.8
Okay
7,616 reviews
LATAM Airlines
7.5
Good
1,890 reviews
Check prices

Boarding

7.6

Comfort

7.4

Overall

7.5

Food

6.7

Crew

8.0

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

LUIS JOSE,Oct 2025

LIM - AEP

Smiles because se upgraded to premiums economy. That was similar to LAN economy years ahí!
British Airways
6.7
Okay
7,562 reviews
LATAM Airlines
7.5
Good
1,890 reviews
Check prices

Boarding

7.6

Comfort

7.4

Overall

7.5

Food

6.7

Crew

8.0

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

LUIS JOSE,Oct 2025

LIM - AEP

Smiles because se upgraded to premiums economy. That was similar to LAN economy years ahí!

Related info for your journey

Find useful and relevant information for your journey from London 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 to Buenos Aires?

    A quick flight from London to Buenos Aires can take about 24h 20m. Turkish Airlines provides one of the quickest options available for as low as £835. London and Buenos Aires are separated by a distance of 6915 mi. Both multi-stop and direct flights can be found to your destination and back.

  • What are the cheapest airlines flying from London to Buenos Aires round-trip?

    Our cheapest airline available from London to Buenos Aires is Air France. Our recent data shows that you can find tickets from as low as £449 on this airline. Additional options worth looking into are Avianca and Air Europa, starting at £704 and £720 round-trip. Air France is 53% 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 to Buenos Aires one-way?

    One-way options have recently been found by users for as low as £377 on Avianca. Other airlines that offer cheap prices include Iberia from £547 and LATAM Airlines from £603 one-way.

  • What are the most popular routes from London to Buenos Aires?

    Most travelers choose London Heathrow - Buenos Aires Ministro Pistarini, London Heathrow - Buenos Aires Jorge Newbery or London City - Buenos Aires Ministro Pistarini when deciding on the best route from London to Buenos Aires.

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

    The cheapest flight price from London to Buenos Aires is £738. On average you can expect to pay £1,352. The most popular route, (London Heathrow - Buenos Aires Ministro Pistarini), can usually be booked for £749.

  • Can I find deals for flights from London to Buenos Aires that include hotel bookings?

    Yes. In addition to deals on London to Buenos Aires flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from London to Buenos Aires?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to Buenos Aires.

  • Can I find deals for business class flights from London to Buenos Aires?

    Yes. Cheapflights offers flight deals from London 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 to Buenos Aires?

    Currently, December is the cheapest month in which you can book a flight from London to Buenos Aires (average of £565). Flying from London to Buenos Aires in July is currently the most expensive (average of £895). 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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Fly from London to Buenos Aires on these airlines

Choose from the following airlines for your flight from London to Buenos Aires. Flights are based on user searches made on Cheapflights and were last updated on 6 December 2025.
British Airways flights from London to Buenos Aires
Air Europa flights from London to Buenos Aires
Iberia flights from London to Buenos Aires

Top 10 airlines flying from London to Buenos Aires

Discover the top 10 airlines that operate flights from London 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 6 December 2025.
AirlineCheapestAverageFlexibilityOn-time
Air FranceCheapest£449Average£1,115FlexibilityNo cancel feeOn-time77%
Search Air France flights
AviancaCheapest£704Average£802FlexibilityNo cancel feeOn-time71%
Search Avianca flights
Air EuropaCheapest£720Average£1,175FlexibilityNo cancel feeOn-time83%
Search Air Europa flights
IberiaCheapest£726Average£1,065FlexibilityNo cancel feeOn-time77%
Search Iberia flights
FinnairCheapest£741Average£1,093FlexibilityNo cancel feeOn-time76%
Search Finnair flights
British AirwaysCheapest£811Average£1,105FlexibilityNo cancel feeOn-time70%
Search British Airways flights
LufthansaCheapest£825Average£1,244FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
LATAM AirlinesCheapest£877Average£1,036FlexibilityNo cancel feeOn-time81%
Search LATAM Airlines flights
American AirlinesCheapest£882Average£1,018FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
KLMCheapest£1,030Average£1,375FlexibilityNo 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 London to Buenos Aires?

Deals for London to Buenos Aires flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from London to Buenos Aires?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Buenos Aires from London.

Can Cheapflights find flights from London to Buenos Aires with no change fees?

Yes, we can. To see specific flights from London 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 London to Buenos Aires become cheaper?

Not ready to book yet? You can track prices for flights from London to Buenos Aires on Cheapflights with our Price Alert feature and get notified when better prices are available.

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