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

🇺🇸 N124DU - Airbus A220 100 - Delta Air Lines DAL2068/DL2068 (LGA-MCI-LGA) - 4.8 mi away @ 40250 ft, heading WNW at 487 mph. Spotted 23x before! [03:38:24 PM CDT] #A062EC #N124DU #BCS1 #DELTA #DAL2068 #DL2068 #ADSB #ADSBbot