The Swedish engineering consulting firm Sweco has determined that Santa Claus should begin his annual worldwide toy delivery in Kyrgyzstan—to be exact, at latitude (N) 40.40°, longitude (E) 74.24°—and continue his journey in a westwardly direction in order to maximize efficiency of distribution and avoid placing undue strain on his reindeer.

They would still have to fly at 6,000 km, or 3,700 miles, per second, though. But I suppose that the conventional limitations of physics aren't really an issue here.