Tableview: by ‘expenses’ I mean all operating costs. The standard IATA classification is:
(Direct operating expenses)Flight deck crew
Fuel & oil
Flight equipment insurance
Maintenance & overhaul
Depreciation
Rentals
Airport charges
Navigation charges
(Indirect operating expenses)Station & ground
Cabin attendants
Passenger service
Load insurance
Ticketing, sales & promotion
General & administrative
Relatively easy to do the allocation by region/route group, more difficult by individual route or flight.