When we got Annie she was flown from Missouri. There didn't seem to be any problems (missouri to NYC) And shes seems to be a very well adjusted little gal over a year later
We even fly with her all the time now, and there don't seem to be any repercussions!
I think there are many other yorkies on this site that have been shipped with no problems. It is the fastest way to get the little guys from point A to B. They may be alone for the little time period but least they get there faster