It depends on the organ (in part as to whether or not you have to stay near the hospital for long periods of time), and also what you are willing to put up with. I had my kidney tx, and then my pancreas, at a center that was a 2 hour direct flight from home. But they had newer procedures that I wanted, I was willing to be that far from home for a while, and they are more than happy to communicate by phone/fax/email, see me once per year, and let my local neph and endo handle most things except for the levels and doses of transplant drugs.