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

🇺🇸 N649DL - Boeing 757 232 - Delta Air Lines DAL8951/DL8951, Detroit Metro Wayne County (DTW) to Syracuse Hancock (SYR) - 3.4 mi away @ 21600 ft, heading NW at 457 mph. Spotted once before. [10:08:43 AM CST] #A88700 #N649DL #B752 #DELTA #DAL8951 #DL8951 #ADSB #ADSBbot