Air France-KLM’s chairman Jean-Marc Janaillac with staff - in ‘casual urban’ clothing – of Joon, the new lower-cost airline.  Photograph: Lionel Bonaventure/AFP/Getty Images

Air France has launched a new airline aimed at “millennial” travellers. Joon will target working 18- to 35-year-olds, though any adult can use the air(...)