Santa has 31 hours of Christmas to work with, thanks to the different time
zones and the rotation of the earth, assuming he travels east to west
(which seems logical). This works out to 822.6 visits per second. This
is to say that for each household with good children, Santa has 1/1000th
of a second to park, hop out of the sleigh, jump down the chimney, fill
the stockings, distribute the remaining presents under the tree, eat
whatever snacks have been left, get back up the chimney, get back into the
sleigh and move on to the next house. Assuming that each of these 91.8
million stops are evenly distributed around the earth (which, of course,
we know to be false but for the purposes of our calculations we will
accept), we are now talking about .78 miles per household, a total trip of
75-1/2 million miles, not counting stops to do what most of us must do at
least once every 31 hours, plus feeding and etc.
This means that Santa's sleigh is moving at 650 miles per second, 3,000
times the speed of sound. For purposes of comparison, the fastest man-
made vehicle on earth, the Ulysses space probe, moves at a poky 27.4 miles
per second - a conventional reindeer can run, tops, 35 miles per hour.