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Cheap flights from London to Buenos Aires from £529

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 28/9. Fares are subject to change and may not be available on all flights or dates of travel.
LON — BUE
11 Jul — 18 Jul1
1 adult

Cheapflights Tip: The best prices from London to Buenos Aires are usually found in November or March, booked 40 days in advance, depart on a Tuesday or Wednesday and return on a Wednesday

Cheap 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 July 2025.

Round-trip from

£792

One-way from

£529

Popular in

December

Cheapest in

November

Average price

£970

Good round-trip deal

£943 or less

Good one-way deal

£843 or less
Avianca
  • Avianca
  • 25/8-22/9
  • 2 total stops
  • 64h 10m total
  • London to Buenos Aires
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28/9
  • 28/9
  • 2 total stops
  • 21h 20m total
  • London to Buenos Aires
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Highest demand for flights based on searches. 4% potential increase in price (£32 potential increase over avg. return price).
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Cheapest flight prices on average. 3% potential price decrease (£22 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 (LON) to Buenos Aires (BUE).
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Price to beat on a one-way flight from London (LON) to Buenos Aires (BUE).
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Find flight deals from London to Buenos Aires

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 July 2025.

Thu 20/1109:15LCY - AEP
2 stops29h 25mSWISS
Thu 4/1214:55AEP - LCY
2 stops23h 10mSWISS
Deal found 4/7£788
Mon 25/822:05LHR - AEP
1 stop35h 35mAvianca
Mon 22/907:00AEP - LHR
1 stop28h 35mAvianca
Deal found 5/7£792
Sat 15/1117:25LGW - AEP
2 stops30h 35mMultiple Airlines
Wed 26/1109:00AEP - LGW
2 stops21h 00mMultiple Airlines
Deal found 5/7£792
Sat 25/1018:00LHR - EZE
2 stops40h 20mLufthansa
Sat 8/1123:55EZE - LHR
1 stop31h 20mLufthansa
Deal found 6/7£794
Tue 14/1008:00LHR - AEP
2 stops29h 20mMultiple Airlines
Sun 19/1010:20AEP - LHR
2 stops32h 35mMultiple Airlines
Deal found 6/7£798
Sat 15/1117:25LGW - EZE
2 stops35h 05mMultiple Airlines
Sat 6/1204:30EZE - LGW
2 stops25h 30mMultiple Airlines
Deal found 5/7£800
Mon 27/1019:15LHR - EZE
3 stops46h 55mMultiple Airlines
Wed 19/1116:45EZE - LHR
2 stops39h 35mMultiple Airlines
Deal found 5/7£800
Thu 13/1113:25LHR - AEP
2 stops30h 45mAir Canada
Mon 1/1213:35AEP - LHR
2 stops38h 35mAir Canada
Deal found 4/7£801
Sun 16/1108:55LHR - EZE
3 stops33h 15mAir Canada
Wed 26/1116:45EZE - LHR
2 stops39h 35mAir Canada
Deal found 4/7£805
Sun 16/1118:40LGW - EZE
2 stops32h 35mSWISS
Mon 1/1207:00EZE - LGW
2 stops31h 50mSWISS
Deal found 4/7£811
Wed 19/1118:40LGW - AEP
2 stops20h 00mSWISS
Thu 4/1214:55AEP - LGW
2 stops23h 55mSWISS
Deal found 4/7£811
Mon 10/1117:10LHR - AEP
2 stops21h 30mSWISS
Wed 26/1114:55AEP - LHR
2 stops23h 55mSWISS
Deal found 4/7£811

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 July 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

LCY - AEP

LCYAEP

London City

Thu 20/11

13:30-11:40

2 stops25h 10m

Buenos Aires Jorge Newbery

Mon 8/12

14:55-17:05

2 stops23h 10m

£788

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Mon 25/8

22:05-05:40

1 stop35h 35m

Buenos Aires Jorge Newbery

Mon 22/9

07:00-15:35

1 stop28h 35m

£792

LondonBuenos Aires

LGW - AEP

LGWAEP

London Gatwick

Sat 15/11

17:25-21:00

2 stops30h 35m

Buenos Aires Jorge Newbery

Wed 26/11

09:00-09:00

2 stops21h 00m

£792

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Sat 25/10

18:00-06:20

2 stops40h 20m

Buenos Aires Ministro Pistarini

Sat 8/11

23:55-10:15

1 stop31h 20m

£794

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Tue 14/10

08:00-09:20

2 stops29h 20m

Buenos Aires Jorge Newbery

Sun 19/10

10:20-22:55

2 stops32h 35m

£798

LondonBuenos Aires

LGW - EZE

LGWEZE

London Gatwick

Sat 15/11

17:25-01:30

2 stops35h 05m

Buenos Aires Ministro Pistarini

Sat 6/12

04:30-09:00

2 stops25h 30m

£800

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Mon 27/10

19:15-15:10

3 stops46h 55m

Buenos Aires Ministro Pistarini

Wed 19/11

16:45-11:20

2 stops39h 35m

£800

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Thu 13/11

13:25-17:10

2 stops30h 45m

Buenos Aires Jorge Newbery

Mon 1/12

13:35-07:10

2 stops38h 35m

£801

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Sun 16/11

08:55-15:10

3 stops33h 15m

Buenos Aires Ministro Pistarini

Wed 26/11

16:45-11:20

2 stops39h 35m

£805

LondonBuenos Aires

LGW - EZE

LGWEZE

London Gatwick

Sun 16/11

18:40-00:15

2 stops32h 35m

Buenos Aires Ministro Pistarini

Tue 2/12

07:00-17:50

2 stops31h 50m

£811

Flights are sorted by cheapest return flights first.

Deals found on 5/7

Showing 1-10 of 54 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 27 June 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 40 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, May is the cheapest month in which you can book a flight from London to Buenos Aires (average of £1,012). Flying from London 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 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 July 2025.

It’s optimal to fly from London to Buenos Aires in the afternoon. By choosing this option you can save up to 21% on the cost of your flight, compared to a flight in the evening.

What is the cheapest day to fly from London to Buenos Aires?

Use this chart to determine the cheapest time to fly return from London to Buenos Aires. Price data was last updated on 16 December 2024.

Travellers seeking maximum savings on their London to Buenos Aires flight should consider departing on Monday mornings 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.

How much does it cost for a return flight from London to Buenos Aires?

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 July 2025.
Check out reviews from past customers who have flown with Emirates, Aerolineas Argentinas, andDelta 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.
Emirates
8.1
Very Good
3,284 reviews
Check prices

Overall

8.1

Crew

8.3

Boarding

8.1

Entertainment

8.2

Food

7.8

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Steven,Feb 2025

GLA - DXB

Although I was in economy it made no difference where the staff were concerned they were attentive and pleasant throughout the flight maybe one day I'll get the chance to see if there's a difference in business or 1st class service but in truth for the way I was treated I can only see the menu being an upgrade as the staff don't need upgrading and are indeed the biggest asset on a long journey a credit to the company.
Emirates
8.1
Very Good
3,284 reviews
Emirates
8.1
Very Good
3,284 reviews
Check prices

Overall

8.1

Crew

8.3

Boarding

8.1

Entertainment

8.2

Food

7.8

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Steven,Feb 2025

GLA - DXB

Although I was in economy it made no difference where the staff were concerned they were attentive and pleasant throughout the flight maybe one day I'll get the chance to see if there's a difference in business or 1st class service but in truth for the way I was treated I can only see the menu being an upgrade as the staff don't need upgrading and are indeed the biggest asset on a long journey a credit to the company.
Aerolineas Argentinas
8.1
Very Good
893 reviews
Emirates
8.1
Very Good
3,284 reviews
Check prices

Overall

8.1

Crew

8.3

Boarding

8.1

Entertainment

8.2

Food

7.8

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Steven,Feb 2025

GLA - DXB

Although I was in economy it made no difference where the staff were concerned they were attentive and pleasant throughout the flight maybe one day I'll get the chance to see if there's a difference in business or 1st class service but in truth for the way I was treated I can only see the menu being an upgrade as the staff don't need upgrading and are indeed the biggest asset on a long journey a credit to the company.
Delta
8.0
Very Good
7,967 reviews
Emirates
8.1
Very Good
3,284 reviews
Check prices

Overall

8.1

Crew

8.3

Boarding

8.1

Entertainment

8.2

Food

7.8

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Steven,Feb 2025

GLA - DXB

Although I was in economy it made no difference where the staff were concerned they were attentive and pleasant throughout the flight maybe one day I'll get the chance to see if there's a difference in business or 1st class service but in truth for the way I was treated I can only see the menu being an upgrade as the staff don't need upgrading and are indeed the biggest asset on a long journey a credit to the company.
KLM
7.8
Good
1,368 reviews
Emirates
8.1
Very Good
3,284 reviews
Check prices

Overall

8.1

Crew

8.3

Boarding

8.1

Entertainment

8.2

Food

7.8

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Steven,Feb 2025

GLA - DXB

Although I was in economy it made no difference where the staff were concerned they were attentive and pleasant throughout the flight maybe one day I'll get the chance to see if there's a difference in business or 1st class service but in truth for the way I was treated I can only see the menu being an upgrade as the staff don't need upgrading and are indeed the biggest asset on a long journey a credit to the company.
Air France
7.5
Good
1,467 reviews
Emirates
8.1
Very Good
3,284 reviews
Check prices

Overall

8.1

Crew

8.3

Boarding

8.1

Entertainment

8.2

Food

7.8

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Steven,Feb 2025

GLA - DXB

Although I was in economy it made no difference where the staff were concerned they were attentive and pleasant throughout the flight maybe one day I'll get the chance to see if there's a difference in business or 1st class service but in truth for the way I was treated I can only see the menu being an upgrade as the staff don't need upgrading and are indeed the biggest asset on a long journey a credit to the company.

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.

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

    Our cheapest airline available from London to Buenos Aires is Avianca. Our recent data shows that you can find tickets from as low as £792 on this airline. Additional options worth looking into are SWISS and Iberia, starting at £811 and £825 round-trip. Avianca is 12% 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 £567 on United Airlines. Other airlines that offer cheap prices include Aeromexico from £567 and Aerolineas Argentinas from £606 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 Gatwick - 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 £756. On average you can expect to pay £945. The most popular route, (London Heathrow - Buenos Aires Ministro Pistarini), can usually be booked for £728.

  • Where are the most common stopover locations when flying from London to Buenos Aires?

    Flights departing from London and landing in Buenos Aires stopover in Madrid most frequently.

  • What are some popular things to do or see while on a stopover in Madrid?

    Spain Building, Puerta del Sol, and Plaza Mayor are currently the most popular points of interest in Madrid at the moment. Those on a stopover in Madrid interested in visiting Spain Building, Puerta del Sol, or Plaza Mayor can do so by traveling 8.5 mi, 8.4 mi, and 8.6 mi, respectively from Madrid Barajas. Travellers can book a car hire at Madrid Barajas for about £22 per day to make their sightseeing more efficient.

  • Where are the least popular stopover locations for London to Buenos Aires flights?

    London to Buenos Aires flights that have stopovers will least frequently stop in New York.

  • 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, May is the cheapest month in which you can book a flight from London to Buenos Aires (average of £1,012). Flying from London 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

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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 July 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 July 2025.
AirlineCheapestAverageFlexibilityOn-time
Air FranceCheapest£439Average£1,046FlexibilityNo cancel feeOn-time77%
Search Air France flights
Air EuropaCheapest£573Average£836FlexibilityNo cancel feeOn-time83%
Search Air Europa flights
ITA AirwaysCheapest£608Average£1,069FlexibilityNo cancel feeOn-time81%
Search ITA Airways flights
Air CanadaCheapest£633Average£674FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
IberiaCheapest£683Average£999FlexibilityNo cancel feeOn-time77%
Search Iberia flights
FinnairCheapest£724Average£870FlexibilityNo cancel feeOn-time76%
Search Finnair flights
British AirwaysCheapest£747Average£1,016FlexibilityNo cancel feeOn-time70%
Search British Airways flights
KLMCheapest£773Average£1,125FlexibilityNo cancel feeOn-time75%
Search KLM flights
LufthansaCheapest£800Average£1,096FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
LATAM AirlinesCheapest£852Average£1,083FlexibilityNo 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 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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