This question comes up a lot, and people post all kinds of goofy answers to it for some reason. Memphis is approximately 200 miles from Nashville. HOWEVER, depending on your exact point of departure...
It's probably 8 or 10 miles, but maybe not that far. The Amtrak station is in downtown Memphis and the airport is in south Memphis. I was close. It is 10.8 miles if you take surface streets and 11.9...