For folks who await delivery in the Seattle area - I bought the Apple TV 4K in Sep and pulled up the tracking info to get an idea of the flight path. Looks like there is flight from SDF to Boeing Field airport at 3:27 PM EDT today ( in roughly 3 hours). Also, this lines up with my Apple TV tracking (was on a thursday as well) which shows a departure scan from Louisville at 3:07 PM. Looks like UPS2984 is the one to look out for. Fingers crossed ! 
http://flightaware.com/live/flight/UPS2984/history/20171102/1927Z/KSDF/KBFI
http://flightaware.com/live/flight/UPS2984/history/20171102/1927Z/KSDF/KBFI