Flight Routes from London to Buenos Aires

Trip type

Our cheapest offers for flights from London to Buenos Aires

Here you can compare cheap flights from London (LON) to Buenos Aires (BUE) for one-way or return trips. The following offers were searched for and found on idealo during the last few days. Or start your own flight search to Buenos Aires. Prices and availability may change at any time.

Outbound Return Airlines Shop Baggage Price
London
Buenos Aires
Outbound
25/05/26
2 Stopovers (AMS, CDG)
KL0996, KL1405, KL2358
29h 50min
Return
07/06/26
1 Stopover (AMS)
KL0702, KL0981
37h 45min
KLM
£741
Best option
London
Buenos Aires
Outbound
25/05/26
1 Stopover (AMS)
KL0990, KL0701
16h 40min
Return
07/06/26
1 Stopover (AMS)
KL0702, KL0989
21h 35min
KLM
£875
London
Buenos Aires
Outbound
17/08/26
1 Stopover (IST)
TK1242, TK0015
39h 35min
Return
15/09/26
1 Stopover (IST)
TK0016, TK1245
42h 15min
Turkish Airlines
£943
London
Buenos Aires
Please note: transfer for connecting flight
Outbound
04/05/26
1 Stopover (MAD)
RK2628, IB0107
18h 00min
Return
22/05/26
1 Stopover (MAD)
IB0102, FR0498
19h 30min
Ryanair UK, Iberia
£1,138
London
Buenos Aires
Outbound
25/05/26
2 Stopovers (AMS, CDG)
KL0996, KL1405, KL2358
29h 50min
Return
07/06/26
1 Stopover (AMS)
KL0702, KL0981
37h 45min
KLM
£742
London
Buenos Aires
Outbound
25/05/26
2 Stopovers (AMS, CDG)
KL0996, KL2007, KL2358
29h 50min
Return
07/06/26
1 Stopover (AMS)
KL0702, KL0989
21h 35min
KLM ?
£777
London
Buenos Aires
Outbound
31/03/26
2 Stopovers (LIN, FCO)
AZ0217, AZ2045, AZ0682
20h 45min
Return
21/04/26
2 Stopovers (FCO, LIN)
AZ0681, AZ2080, AZ0224
28h 20min
Italia Trasporto Aereo
£880
Offers unavailable
London
Buenos Aires
Outbound
31/03/26
2 Stopovers (LIN, FCO)
AZ0217, AZ2045, AZ0682
20h 45min
Return
21/04/26
2 Stopovers (FCO, LIN)
AZ0681, AZ2016, AZ0226
20h 15min
Italia Trasporto Aereo ?
£921
Offers unavailable
London
Buenos Aires
Outbound
19/06/26
1 Stopover (MAD)
BA3270, BA4216
24h 50min
Return
05/07/26
1 Stopover (MAD)
BA4254, BA3271
30h 55min
British Airways
£948
London
Buenos Aires
Outbound
19/06/26
1 Stopover (MAD)
BA3270, BA4216
24h 50min
Return
05/07/26
1 Stopover (MAD)
BA4254, BA3271
30h 55min
British Airways
£953
Prices based on recent searches, subject to last-minute changes
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Tips and tricks to help you find cheap flights from London to Buenos Aires

Favourite airline: Air Europa
63 % of travellers choose to book flights on this route with Air Europa, ITA and KLM.
Air Europa
32 %
ITA
19 %
KLM
12 %
Cheapest weekday: Tuesday
The cheapest flights on this route are operated on Tuesday.
Favourite connection: via Madrid
The most popular flights on this route are via Madrid and are booked by 38 % of all travellers.
Route
bookings
1 stopover Madrid Barajas
18h 15min, from 940 GBP
38 %
1 stopover Rome Fiumicino Leonardo da Vinci
38h 45min, from 893 GBP
15 %
1 stopover Amsterdam Schiphol
36h 25min, from 756 GBP
11 %

Important flight information

Flight information: London - Buenos Aires

Outbound and return from 740,99 GBP
Flight duration min. 13:45 / max. 13:55
Return flight duration min. 13:00/ max. 13:15
Distance 11141 km
Flights per week 16
Departure airport Airport London (LCY, LGW, LHR, LTN, STN, SEN) (LON)
Arrival airport Airport Buenos Aires - all Airports (EZE, AEP) (BUE)
Destination country Flights to Argentina
Flight destinations with a similar price