EK or EY cannot turn up and start flying internally all over Europe next week in its aircraft.
neville_nobody,
Many airlines operate internal flights in Europe, eg LAN operates Madrid to Frankfurt. It is less common these days for tag flights as aircraft have the legs to do direct, however the history is there and still goes on today.
Qantas many moons ago used to operate Athens to Belgrade, Athens to Rome, Athens to Paris, Vienna to Frankfurt to Amsterdam. San Francisco to Vancouver. They even used to operate Darwin to Bangkok.
Cathay had for years operated Adelaide to Melbourne, and Cairns to Brisbane.