If there are no airline passenger service, it can be a loss, and the airlines have so many expenses. Airline passenger revenue it very well (such as purchases of plane or airplane knee)
If no passenger airline service. It can loss And the airline that has cost so many airline passengers need revenue as well. (Such as the purchase of aircraft Or knee plane)
If no passenger airline service. It can loss and the airline is to spend so much. So the airline wanted money from passengers, too. (such as buying a plane or plane knee).