Was it stuck at some waypoint in the middle of the route? What we do is, first get the distance between 'closest point' and the end of the route. The distances for all points in the route are pre-computed whenever we load the route into memory. And then we add the distance between our current location and that closest point. The number in the top right corner is not an 'as the crow flies' distance to the destination, but the true sum assuming that we will have to pass all waypoints including the currently selected one.