As of until now, both the SpaceShipTwo and its retired predecessor the SpaceShipOne, landed on the same spaceport they launched from in their spaceflights, the Mojave air- and spaceport. I wonder whether there are spaceports in America that are close enough so the SpaceShipTwo could reach the other one when launching from another. Or whether the SpaceShipOne could have done it (it could reach a higher apogee than VSS Unity is able to). The Edwards Air Force Base is very close to the Mojave spaceport. Reportedly 17 mi (27 km) though in my source I'm unsure whether it was the airport I meant. Vandenberg is not that far from these airports either.
Would the Scaled Composites spaceplanes be able to reach another spaceport or military base through spaceflight? If so, which ones, and is such flight going to be tested?