Two quotes for the same route on the same aircraft type can differ by a large margin. The distance is the smallest part of the calculation.
The aircraft has to get to you
Charter aircraft are based somewhere and must fly to the departure airport if they are not already there. That positioning flight is billed even though nobody is aboard.
The same applies at the end of the trip if the aircraft must return to base or reposition for its next booking. A one-way charter frequently pays for the empty return.
This is why a route can be cheap on one day and expensive on another. Availability of an aircraft already in the right place is the dominant variable.
Empty legs are discounted for a reason
When a repositioning flight is already scheduled and paid for, selling seats on it is close to pure margin. Prices on those flights fall well below normal charter rates.
The constraint is that the route, timing and aircraft are fixed by someone else's booking. The discount buys someone else's schedule.
They also cancel when the originating booking changes. Treating an empty leg as confirmed transport is the usual mistake.
Crew duty rules shape the schedule
Flight and duty time limits cap how long a crew can work and require defined rest periods. A long day may require a second crew or an overnight stop.
Crew accommodation, allowances and repositioning all appear in the price when a trip extends beyond a single duty period. Waiting time at a destination is billed as well.
This is why multi-stop itineraries cost disproportionately more. Each additional sector consumes duty time and constrains the rest of the day.
Fixed ownership costs sit underneath everything
An aircraft incurs financing, hangarage, insurance, crew salaries and maintenance reserves whether it flies or not. Those costs are recovered across whatever hours it does fly.
Maintenance is scheduled by hours and cycles rather than by calendar, and reserves are set aside per hour flown. Engine programmes are a substantial component of that hourly figure.
Aircraft flown few hours per year therefore carry a very high cost per hour. Utilisation is the main determinant of whether ownership or charter makes sense.
Access models divide the fixed cost differently
Fractional ownership, jet cards and membership programmes are all mechanisms for sharing fixed costs across users. Each fixes different variables and leaves others open.
Guaranteed availability commands a premium because the operator must hold capacity in reserve. Programmes with notice periods and blackout dates cost less for the same reason.
Comparing them requires the total annual cost for a realistic flying pattern rather than the hourly rate. The hourly figure is the least informative number quoted.