Vistara airline India with Germany, France and the UK signed bilateral agreements under which the airlines of respective   countries can operate international flights with certain restrictions.  Vistara, an Indian private airline is likely to start flight operations between India and the UK, Germany and France under the bilateral air bubble arrangements that have been signed with these countries .Vistara has already got the slots at the Heathrow airport in London. Flight schedules proposed between Delhi and London are likely to be announced in the next few days.Vistara is also likely to operate flights connecting Indian cities with Frankfurt and   Paris very soon.