Map of the St. Louis area showing the position and track of the aircraft described in the post.
🇺🇸 N634FR - Airbus A321 271NXSL - Frontier Airlines FFT45/F945, Cancun (CUN) to Chicago O'Hare (ORD) - 4.3 mi away @ 34050 ft, heading NNE at 502 mph. Spotted 15x before. [05:23:13 PM CST] #A84D25 #N634FR #A21N #FRONTIER_FLIGHT #FFT45 #F945 #ADSB #ADSBbot