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

🇺🇸 N633FR - Airbus A321 271NXSL - Frontier Airlines FFT1402/F91402, Denver (DEN) to Nashville (BNA) - 4.4 mi away @ 35000 ft, heading ESE at 541 mph. Spotted 19x before! [08:27:15 PM CDT] #A8496E #N633FR #A21N #FRONTIER_FLIGHT #FFT1402 #F91402 #ADSB #ADSBbot