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

🇺🇸 N640FR - Airbus A321 271NXSL - Frontier Airlines FFT2799/F92799, Chicago O'Hare (ORD) to Austin-Bergstrom (AUS) - 3.7 mi away @ 28400 ft, heading SW at 451 mph. Spotted 4x before! [11:44:45 PM CST] #A865C8 #N640FR #A21N #FRONTIER_FLIGHT #FFT2799 #F92799 #ADSB #ADSBbot

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

🇺🇸 N640FR - Airbus A321 271NXSL - Frontier Airlines FFT3175/F93175, Detroit Metro Wayne County (DTW) to Dallas-Fort Worth (DFW) - 4.4 mi away @ 36400 ft, heading SW at 518 mph. Spotted 3x before! [10:35:36 PM CDT] #A865C8 #N640FR #A21N #FRONTIER_FLIGHT #FFT3175 #F93175 #ADSB #ADSBbot

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

🇺🇸 N640FR - Airbus A321 271NXSL - Frontier Airlines FFT3243/F93243, Chicago O'Hare (ORD) to Dallas-Fort Worth (DFW) - 4.4 mi away @ 37825 ft, heading SSW at 555 mph. Spotted 2x before! [11:54:24 AM CDT] #A865C8 #N640FR #A21N #FRONTIER_FLIGHT #FFT3243 #F93243 #ADSB #ADSBbot

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

🇺🇸 N640FR - Airbus A321 271NXSL - Frontier Airlines FFT3243/F93243, Chicago O'Hare (ORD) to Dallas-Fort Worth (DFW) - 3.8 mi away @ 30100 ft, heading SW at 530 mph. Spotted once before! [03:53:17 PM CDT] #A865C8 #N640FR #A21N #FRONTIER_FLIGHT #FFT3243 #F93243 #ADSB #ADSBbot