iPhone Maps and Favorites

I’m trying to figure out how to use Favorites (Maps App) on my iPhone as follows:

- Have saved several favorites.

- I would like to see the distance between two of my Favorites. So I tap on the Favorite that I want as my destination. The map comes up automatically.

- Now I want to change the “from My Location” to another Favorite, But I can’t find any menu or spot tha will display a list of favorites. 

Is this even possible?

Thanks!