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

🇺🇸 N257NV - Airbus A320 214SL - Allegiant Air AAY360/G4360, Bozeman Yellowstone (BZN) to Nashville (BNA) - 4.5 mi away @ 37175 ft, heading SE at 551 mph. Spotted 6x before! [02:56:32 PM CDT] #A272BF #N257NV #A320 #ALLEGIANT #AAY360 #G4360 #ADSB #ADSBbot