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

🇺🇸 N665FR - AIRBUS A321-271NX - Frontier Airlines FFT3499/F93499, Hartsfield - Jackson Atlanta (ATL) to Kansas City (MCI) - 4.5 mi away @ 35400 ft, heading WNW at 462 mph. Spotted 3x before! [02:06:57 PM CDT] #A8C759 #N665FR #A21N #FRONTIER_FLIGHT #FFT3499 #F93499 #ADSB #ADSBbot