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

🇺🇸 N199NV - Airbus A320 214SL - Allegiant Air AAY571/G4571, Austin-Bergstrom (AUS) to Gerald R Ford (GRR) - 20.3 mi away @ 37250 ft, heading NE at 592 mph. Spotted 6x before. [11:16:52 AM CDT] #A18ADA #N199NV #A320 #ALLEGIANT #AAY571 #G4571 #ADSB #ADSBbot