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

🇺🇸 N281NV - Airbus A320 214 - Allegiant Air AAY542/G4542, Austin-Bergstrom (AUS) to Gerald R Ford (GRR) - 4.5 mi away @ 38200 ft, heading NE at 497 mph. Spotted 5x before! [09:19:56 PM CST] #A2D2F2 #N281NV #A320 #ALLEGIANT #AAY542 #G4542 #ADSB #ADSBbot