Anyone remember Piedmont (PI) before it was absorbed by US Airways?
Now, go back a bit further, to the 1960's. Piedmont, based in Winston-Salem, NC, served that city's Smith Reynolds Airport (INT) in addition to what today is Piedmont Triad (GSO). As a kid I took a Piedmont flight from GSO to INT. I think that's roughly a trip of 18 miles or so.