Hi
1-first solution
Google map is your friend to draw an itinerary from a town to another town (or from a point (latiture,longitude) to another point
on map.
see this *4* code in my blog
http://yousfi.over-blog.com/2015/08/playing-with-google-maps-api.html
(click on simply to grab the code and copy it to a prg and run).

2-solution is to plot the ininerary wanted point by point on the desired map.
see solutions in my blog:
http://yousfi.over-blog.com/2016/03/vfp-shapes-and-maps-drawings.html