The flying hour is the unit that matters
Charter pricing in Nepal is built on aircraft time. Everything else — fuel, crew, maintenance reserve, insurance — is folded into an hourly rate for the aircraft type, and your quote is essentially that rate multiplied by the hours your trip will consume.
This is why a short Pokhara scenic flight and a multi-sector Everest day look so different on paper. It is also why adding a single extra landing can move a quote noticeably: the aircraft is running, and the clock does not stop while you are on the ground.

