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

🇺🇸 N877DN - Boeing 737NG 900ER/W - Delta Air Lines DAL470/DL470, Harry Reid (LAS) to Detroit Metro Wayne County (DTW) - 4.2 mi away @ 36950 ft, heading ENE at 642 mph. Spotted 9x before! [02:50:42 PM CDT] #AC10AF #N877DN #B739 #DELTA #DAL470 #DL470 #ADSB #ADSBbot