I grew up in a little border town on the KY / Tn border.....
Portland Tn was pretty close, When I was a kid we always went to Nashville, took about 35-40 minutes....Pretty sure if you hit 65
right there by Titans Stadium...you can be in Kentucky in 40 minutes...
Google says 45 miles
Not being a picky fella......just was too familiar to the area to not ask