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

🇺🇸 N650FR - Airbus A321 271NXSL - Frontier Airlines FFT1449/F91449, Hartsfield - Jackson Atlanta (ATL) to Denver (DEN) - 4.0 mi away @ 33000 ft, heading WNW at 490 mph. Spotted 5x before! [10:19:14 AM CDT] #A88D47 #N650FR #A21N #FRONTIER_FLIGHT #FFT1449 #F91449 #ADSB #ADSBbot