Ok, something like….
Use Photoshop or similair to create the red dotted line route.
Got to after fx
Import red dotted line as layer and drop into your comp
Open your plane layer.Drop into the comp. Right click, then select TRANFORM from the pop up menu. Look for orient along path.select it
On your plane layer use MOTION SKECTH to draw desired path (use your red layer as a guide.
draw a mask over the red route layer. use mask transform tool to edit shape to reveal the path as the animation progresses.
Tha should do it.
Sorry if its a bit clunky. mail me if you need any more info.
salutations from codemonkey