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

🇺🇸 N518DQ - Airbus A321 271NXSL - Delta Air Lines DAL917/DL917, John F Kennedy (JFK) to Salt Lake City (SLC) - 4.3 mi away @ 33525 ft, heading W at 514 mph. Spotted 5x before! [12:36:18 PM CDT] #A67F81 #N518DQ #A21N #DELTA #DAL917 #DL917 #ADSB #ADSBbot