Here is an airline with a 'flag stop' at Kenora and numerous other locations! Will passengers arrive at a crude shelter by the runway and stop their plane in the daytime by using a flag ... and at night time by using a kerosene lantern?!
... Before Canadian railways adopted aviation-inspired terminology and practices (such as Rail Traffic Controller instead of Dispatcher) this airline used the term 'flag stop' to denote an optional stop which would probably be based on tickets purchased and registered before the flight departed.
Once again, a document collected by LC Gagnon provides interesting perspectives into the history of Canadian transportation.
Service to Shanghai was 'suspended' in this 1950 timetable. The Chinese Communist Revolution was in progress at this point in history. Shanghai was taken over by the People's Liberation Army in May 1949.
As noted in other posts, the government's original policy was that no airlines (public or private) were to be allowed to compete on the same route. This ruling was probably inspired by the ruinous competition seen during Canada's railway boom. Trans-Canada Air Lines (a crown corporation) was to have a monopoly on 'main line' Canadian routes and (all) international routes. Here, we can see that CPAL has now been allowed to operate on Pacific international routes.