TheAirline.Models.Routes.Route.GetFlightTime C# (CSharp) Method

        public TimeSpan GetFlightTime(AirlinerType type)
        {
            if (HasStopovers)
            {
                double totalMinutes = Stopovers.SelectMany(s => s.Legs)
                                               .Sum(l => l.GetFlightTime(type).TotalMinutes);
                double totalRestTime = FleetAirlinerHelpers.GetMinTimeBetweenFlights(type).TotalMinutes
                                       *(Stopovers.SelectMany(s => s.Legs).Count() - 1);
                var time = (int) (totalRestTime + totalMinutes);

                return new TimeSpan(0, time, 0);
            }
            return MathHelpers.GetFlightTime(Destination1, Destination2, type);
        }