I would like to have the option to have SD stop navigating automatically after landing. I sometimes forget to do this manually and end up with a "flight track" that follows me as I drive away from the airport.

I have to admit that I have a lot of "flights" between the airfield and home as well...
Thankfully, they are always divided from the real flights, so deleting hasn't been an issue so far.

I'll second the notion of having an auto stop as well. 
Not sure how it would be implemented from an algorithm perspective though.