I'm set as operator of a starport, but can't transport there (and neither can anyone else that's tried). The starport is powered, managed by a transport faction but doesn't show up as a destination when I try NPC transport.
The NPC transport can only be used to a starport that is either owned by a transport faction, or owned by your faction with a transport faction managing it. Or its an NPC one, but thats self evident. Having a personal starport managed does not confer on it the NPC travel ability.