New Route System

[Unknown98]

You don't even need to know the turnaround time, all you need to know is the total extra time you've added to the prior flights. Which is optional really, the only reason you'd do that is to make the times even (depart at 14:30 instead of 14:27, etc). Or perhaps once delays are implemented you could adjust times a bit further apart to protect against delays. Although the same thing could be accomplished by making the aircraft's turnaround time longer.

As it is now you could just make the route as it is presented to you by setting the departure times equal exactly to the "Ready At" times and everything would turn out fine.