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

🇺🇸 N191NV - Airbus A320 214SL - Allegiant Air AAY91/G491, Blue Grass (LEX) to Harry Reid (LAS) - 4.0 mi away @ 35125 ft, heading WNW at 452 mph. Spotted once before! [10:23:21 PM CDT] #A16D22 #N191NV #A320 #ALLEGIANT #AAY91 #G491 #ADSB #ADSBbot