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

🇺🇸 N278NV - Airbus A320 214 - Allegiant Air AAY539/G4539, Gerald R Ford (GRR) to Austin-Bergstrom (AUS) - 4.4 mi away @ 38725 ft, heading SW at 451 mph. Spotted once before! [03:34:58 PM CST] #A2C574 #N278NV #A320 #ALLEGIANT #AAY539 #G4539 #ADSB #ADSBbot

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

🇺🇸 N278NV - Airbus A320 214 - Allegiant Air AAY539/G4539, Gerald R Ford (GRR) to Austin-Bergstrom (AUS) - 4.2 mi away @ 33425 ft, heading SW at 609 mph. Spotted for first time! [02:54:17 PM CST] #A2C574 #N278NV #A320 #ALLEGIANT #AAY539 #G4539 #ADSB #ADSBbot