No, because the return route would also be a 0.5 route.
So a plane flys a 0.5 route SYD-LAX one day, then a 0.5 route LAX-SYD the next day. However, due to AM's restrictions on where you can start routes from, the return LAX-SYD flight gets counted as a SYD-LAX flight.
The most realistic way to do it would be to give each plane a weekly schedule, complete with time of day, time zones, and restrictions on when you can fly. But that would be way too complex for a webgame.