LAHORE - Civil Aviation Authority (CAA) Pakistan is also facing huge financial losses as the national and foreign airlines using Pakistan airspace have suspended their operation due to closure of airspace over UK and Europe. A senior officer of CAA seeking anonymity said that just from Lahore and Karachi FIR (Flight Information Region) 225 to 250 flights had been using Pakistani airspace daily but now number of flights have minimised up to 50 to 60 after the suspension of operation. He said that on April 17, number of these flights were 66 while on April 19, 50 flights from Lahore airspace and 42 from Karachi. It is worth mentioning here that CAA charges $200 to $400 from every aircraft which uses Pakistan space as per the weight of the aircraft. An average loss of $60,000 is being faced by CAA daily as nearly 200 flights are not using airspace due to which an average loss was calculated as $60,000 by an analyst of CAA on Tuesday. He said though PIA was also facing severe losses due to suspension of operation for UK and European countries but CAA could not also be exempted in this regard. He said that thousands passengers were stranded at various international airports and airlines concerned were looking after them. He expressed hope that airspace on Wednesday would become better and operation could be started. During last five days, 65 flights of PIA to Europe and UK have been cancelled and loss of revenue to PIA so far is around $10m which is likely to rise to $25m by the time PIA activates its flights to Europe and UK, he added. Nearly 16,000 passengers in Pakistan, Europe and UK are stranded, waiting for restoration of flights. Few passengers have cancelled their flight itineraries. PIA has worked out a new route and operated flights directly to Toronto and across South of Atlantic and has successfully managed to operate four flights to Toronto from Pakistan.