ROUTE UPDATE: Four of Aerolineas Argentinas' scheduled European Flights to make stop in London-Heathrow (LHR) in September

Four of Aerolineas Argentinas' scheduled flights to Barcelona (BCN) & Rome - Fiumucino (FCO) will make a stop in London-Heathrow (LHR) in September taking fans to the 2015 Rugby World Cup, which Argentina will be participating in.  

Aerolineas' normal Buenos Aires - Barcelona round-trip flights will operate on a "triangle" basis with a stop in London on 18/19Sep15: 

Buenos Aires Ezeiza (EZE) - London-Heathrow (LHR) - Barcelona (BCN) - Buenos Aires Ezeiza (EZE).

A similar routing will be followed on 25/26Sep15 but stopping in London after Barcelona: 

Buenos Aires Ezeiza (EZE) - Barcelona (BCN) - London-Heathrow (LHR) - Buenos Aires Ezeiza (EZE).

A similar concept will be implemented in October towards the end of the competition adding London to the normal Rome route instead:

Buenos Aires Ezeiza (EZE) - London-Heathrow (LHR) - Rome-Fiumicino (FCO) - Buenos Aires Ezeiza (EZE) on 09/11Oct15.

Buenos Aires Ezeiza (EZE) - Rome-Fiumicino (FCO) - London-Heathrow (LHR) - Buenos Aires Ezeiza (EZE) on 17/18Oct15.

All of the flights will be operated by Aerolineas Argentinas' A340-300's. 

Source:

http://airlineroute.net/2015/05/06/ar-lhr-sep15/ via Eric Trum