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

🇺🇸 N878DN - Boeing 737NG 900ER/W - Delta Air Lines DAL494/DL494, Los Angeles (LAX) to Detroit Metro Wayne County (DTW) - 4.2 mi away @ 34475 ft, heading ENE at 524 mph. Spotted 19x before! [02:14:14 PM CDT] #AC1466 #N878DN #B739 #DELTA #DAL494 #DL494 #ADSB #ADSBbot