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

🇺🇸 N145DQ - Airbus A220 100 - Delta Air Lines DAL856/DL856 (LGA-DFW-LGA) - 4.9 mi away @ 39725 ft, heading NE at 604 mph. Spotted 13x before! [03:50:31 PM CDT] #A0B59D #N145DQ #BCS1 #DELTA #DAL856 #DL856 #ADSB #ADSBbot