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Cheap flights from London to Buenos Aires from £455

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 22/8. Fares are subject to change and may not be available on all flights or dates of travel.
LON — BUE
7 Aug — 14 Aug1
1 adult
1 adult, Economy, 0 bags

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 8 July 2026.

Sat 29/822:05
LHR
-
EZE
1 stop30h 20m
Avianca
Mon 14/907:10
EZE
-
LHR
1 stop28h 25m
Avianca
Deal found 7/7£856
Sun 27/922:05
LHR
-
AEP
1 stop35h 35m
Avianca
Sun 1/1107:00
AEP
-
LHR
1 stop28h 35m
Avianca
Deal found 7/7£861
Mon 5/1014:05
LHR
-
EZE
3 stops52h 25m
Air Canada
Wed 14/1016:35
EZE
-
LHR
2 stops36h 00m
Air Canada
Deal found 7/7£862
Tue 25/818:40
LHR
-
EZE
2 stops20h 10m
Multiple Airlines
Thu 1/1016:35
EZE
-
LHR
1 stop25h 35m
Multiple Airlines
Deal found 7/7£866
Sat 21/1112:40
LGW
-
EZE
1 stop22h 05m
Multiple Airlines
Sat 28/1114:25
EZE
-
LGW
1 stop23h 00m
Multiple Airlines
Deal found 6/7£869
Tue 25/809:10
STN
-
EZE
1 stop25h 35m
Multiple Airlines
Thu 1/1018:30
EZE
-
STN
2 stops34h 45m
Multiple Airlines
Deal found 5/7£869
Sun 23/817:40
LHR
-
EZE
2 stops24h 50m
Air Canada
Thu 1/1016:35
EZE
-
LHR
2 stops34h 00m
Air Canada
Deal found 7/7£869
Fri 21/811:35
STN
-
EZE
1 stop23h 10m
Multiple Airlines
Thu 1/1018:30
EZE
-
STN
2 stops34h 45m
Multiple Airlines
Deal found 5/7£869
Sat 14/1112:40
LGW
-
EZE
1 stop22h 05m
Multiple Airlines
Sat 21/1114:25
EZE
-
LGW
1 stop17h 25m
Multiple Airlines
Deal found 6/7£870
Fri 21/822:05
LHR
-
EZE
1 stop21h 35m
Multiple Airlines
Tue 29/919:45
EZE
-
LHR
1 stop33h 25m
Multiple Airlines
Deal found 7/7£873
Wed 26/816:25
STN
-
EZE
1 stop18h 20m
Multiple Airlines
Thu 1/1018:30
EZE
-
STN
2 stops34h 45m
Multiple Airlines
Deal found 5/7£875
Mon 16/1121:40
LHR
-
EZE
1 stop21h 10m
Multiple Airlines
Tue 8/1207:30
EZE
-
LHR
2 stops21h 55m
Multiple Airlines
Deal found 7/7£875

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 8 July 2026.

Round-trip from

£856

One-way from

£455

Popular in

December

Cheapest in

September

Average price

£1,066

Good round-trip deal

£1,081 or less
Avianca
  • Avianca
  • 29/8-14/9
  • 2 total stops
  • 58h 45m total
  • London to Buenos Aires
Search Deals
22/8
  • 22/8
  • 1 total stop
  • 26h 00m total
  • London to Buenos Aires
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (£55 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£20 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 2026
Search Deals
Price to beat on a round-trip 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 8 July 2026.
Use the filters below to find and compare flights from London to Buenos Aires that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonBuenos Aires

LGW - EZE

LGWEZE

London Gatwick

Sun 23/8

20:40-16:05

1 stop23h 25m

Buenos Aires Ministro Pistarini

Mon 28/9

17:50-20:00

1 stop22h 10m

£898

LondonBuenos Aires

LGW - AEP

LGWAEP

London Gatwick

Fri 6/11

10:45-09:20

2 stops25h 35m

Buenos Aires Jorge Newbery

Thu 26/11

10:30-09:50

2 stops20h 20m

£904

LondonBuenos Aires

LGW - AEP

LGWAEP

London Gatwick

Mon 16/11

21:35-09:20

2 stops38h 45m

Buenos Aires Jorge Newbery

Wed 25/11

10:30-15:05

2 stops25h 35m

£910

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Mon 16/11

08:15-09:20

2 stops28h 05m

Buenos Aires Jorge Newbery

Wed 25/11

10:30-21:35

2 stops32h 05m

£911

LondonBuenos Aires

LCY - EZE

LCYEZE

London City

Fri 4/9

09:20-05:50

1 stop24h 30m

Buenos Aires Ministro Pistarini

Sun 4/10

15:05-16:40

1 stop21h 35m

£916

LondonBuenos Aires

LHR - AEP

LHRAEP

London Heathrow

Fri 4/9

12:00-17:20

2 stops33h 20m

Buenos Aires Jorge Newbery

Sun 4/10

14:30-22:00

2 stops27h 30m

£918

LondonBuenos Aires

LTN - EZE

LTNEZE

London Luton

Thu 12/11

08:15-16:00

3 stops34h 45m

Buenos Aires Ministro Pistarini

Sun 22/11

12:15-13:30

2 stops22h 15m

£925
Fastest return journey

LondonBuenos Aires

LCY - EZE

LCYEZE

London City

Thu 26/11

07:50-21:00

1 stop16h 10m

Buenos Aires Ministro Pistarini

Sun 29/11

19:20-14:15

1 stop15h 55m

£934

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Mon 16/11

09:40-10:55

2 stops28h 15m

Buenos Aires Ministro Pistarini

Tue 8/12

21:30-08:05

2 stops31h 35m

£936

LondonBuenos Aires

LHR - EZE

LHREZE

London Heathrow

Sat 29/8

15:15-09:45

1 stop22h 30m

Buenos Aires Ministro Pistarini

Mon 14/9

20:10-06:25

1 stop30h 15m

£937

Flights are sorted by cheapest return flights first.

Deals found on 6/7

Showing 1-10 of 60 resultsSorted by cheapest first
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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

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

Currently, July is the cheapest month in which you can book a flight from London to Buenos Aires (average of £118). Flying from London to Buenos Aires in December is currently the most expensive (average of £1,369). 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 8 July 2026.

When flying from London to Buenos Aires, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 8 July 2026.

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 25% 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.

Bogotá (BOG) is the most affordable one-stop option, with an average return flight price of £755.

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 17m.

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

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

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 55 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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 8 July 2026.
Check out reviews from past customers who have flown with LATAM Airlines,Iberia, andLufthansa 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
7.4
Good
1,950 reviews
Check prices

Comfort

7.3

Entertainment

7.0

Boarding

7.5

Crew

8.0

Food

6.7

Overall

7.4

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
7.4
Good
1,950 reviews
LATAM Airlines
7.4
Good
1,950 reviews
Check prices

Comfort

7.3

Entertainment

7.0

Boarding

7.5

Crew

8.0

Food

6.7

Overall

7.4

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
3,249 reviews
LATAM Airlines
7.4
Good
1,950 reviews
Check prices

Comfort

7.3

Entertainment

7.0

Boarding

7.5

Crew

8.0

Food

6.7

Overall

7.4

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
8,124 reviews
LATAM Airlines
7.4
Good
1,950 reviews
Check prices

Comfort

7.3

Entertainment

7.0

Boarding

7.5

Crew

8.0

Food

6.7

Overall

7.4

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
8,103 reviews
LATAM Airlines
7.4
Good
1,950 reviews
Check prices

Comfort

7.3

Entertainment

7.0

Boarding

7.5

Crew

8.0

Food

6.7

Overall

7.4

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
6.5
Okay
2,521 reviews
LATAM Airlines
7.4
Good
1,950 reviews
Check prices

Comfort

7.3

Entertainment

7.0

Boarding

7.5

Crew

8.0

Food

6.7

Overall

7.4

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 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 23h 25m. British Airways provides one of the quickest options available for as low as £898. London and Buenos Aires are separated by a distance of 6908 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 Avianca. Our recent data shows that you can find tickets from as low as £688 on this airline. Additional options worth looking into are Iberia and LATAM Airlines, starting at £734 and £847 round-trip. Avianca is 29% cheaper than the average price of flights available within the next 90 days to this destination.

  • 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 £1,029. On average you can expect to pay £1,366. The most popular route, (London Heathrow - Buenos Aires Ministro Pistarini), can usually be booked for £771.

  • 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, July is the cheapest month in which you can book a flight from London to Buenos Aires (average of £118). Flying from London to Buenos Aires in December is currently the most expensive (average of £1,369). 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 8 July 2026.
British Airways flights from London to Buenos Aires
Iberia flights from London to Buenos Aires
Air Europa flights from London to Buenos Aires

Top 8 airlines flying from London to Buenos Aires

Discover the top 8 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 8 July 2026.
AirlineCheapestAverageFlexibilityOn-time
AviancaCheapest£688Average£796FlexibilityNo cancel feeOn-time71%
Search Avianca flights
IberiaCheapest£734Average£1,068FlexibilityNo cancel feeOn-time77%
Search Iberia flights
LATAM AirlinesCheapest£847Average£1,068FlexibilityNo cancel feeOn-time81%
Search LATAM Airlines flights
American AirlinesCheapest£871Average£887FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
British AirwaysCheapest£877Average£1,047FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Air EuropaCheapest£905Average£1,172FlexibilityNo cancel feeOn-time83%
Search Air Europa flights
LufthansaCheapest£942Average£1,227FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
FinnairCheapest£1,048Average£1,095FlexibilityNo cancel feeOn-time76%
Search Finnair 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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