where,  – prime cost of aircraft flight hour;

- hourly flight efficiency.

Hourly flight efficiency is calculated according to the formula:

7216 USD/hour                                                                     (16)

where,  – maximum commercial loading of aircraft;k – coefficient of aircraft commercial load usage (it equals 0.8); – flight speed of aircraft, km/hour.

Flight speed of aircraft is calculated according to the formula:

  686 km/hour                                                                               (17)

where,  – distance of non-stop flight with maximal commercial loading, km;

– cruise speed, km/hour;

– take-off/landing time, hour.

1.3.Determination of break-even point of carrying out the flight Kyiv-Lviv