Map of the St. Louis area showing the position and track of the aircraft described in the post.

🇺🇸 N438UP - Boeing 757 24APF - United Parcel Service UPS996/5X996, Louisville Muhammad Ali (SDF) to Portland (PDX) - 4.3 mi away @ 35150 ft, heading W at 461 mph. Spotted 5x before. [01:23:45 AM CST] #A542A6 #N438UP #B752 #UPS #UPS996 #5X996 #ADSB #ADSBbot