public FlightModel CreateFlight(int departureAirportId, int arrivalAirportId)
        {
            var flight = new FlightModel();

            var arrivalAirport   = _airportBusiness.GetAirportById(arrivalAirportId);
            var departureAirport = _airportBusiness.GetAirportById(departureAirportId);

            flight.ArrivalAirport   = arrivalAirport ?? new AirportModel();
            flight.DepartureAirport = departureAirport ?? new AirportModel();

            if (arrivalAirport != null && departureAirport != null)
            {
                flight.Distance  = _flightService.CalculateDistanceWithHaversineFormulae(arrivalAirport.Coordinates, departureAirport.Coordinates);
                flight.Duration  = _flightService.CalculateTimeOfFlight(flight.Distance, _speed);
                flight.Carburant = _flightService.CalculateFuelVolumeForFlight(flight.Distance, _fuelConsumption, departureAirport.TakeOffEffort);
            }

            flight.Creation = DateTime.Today;

            var flightEntity = SetFlightEntity(flight);

            _TUIAssessmentDAL.SaveFlightEntity(flightEntity);

            return(flight);
        }