I think you may be overcomplicating it, sounds like when you are talking about pathfinding you are talking about AI, but why not just animate them along the points. Your runway is a straight line and then has the corners, just animate from 1 point to the next until you hit an end zone or something. Once you start having T intersections and other planes you will just need to do some other checks to make sure they aren’t going to collide etc.