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

🇺🇸 N191NV - Airbus A320 214SL - Allegiant Air AAY453/G4453, Fort Lauderdale/Hollywood (FLL) to Des Moines (DSM) - 4.4 mi away @ 35275 ft, heading NW at 506 mph. Spotted 3x before. [09:29:18 PM CST] #A16D22 #N191NV #A320 #ALLEGIANT #AAY453 #G4453 #ADSB #ADSBbot