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

🇺🇸 N611FR - Airbus A321 271NXSL - Frontier Airlines FFT1581/F91581, Richmond (RIC) to Denver (DEN) - 3.8 mi away @ 32475 ft, heading W at 434 mph. Spotted 51x before. [06:01:10 PM CST] #A7F302 #N611FR #A21N #FRONTIER_FLIGHT #FFT1581 #F91581 #ADSB #ADSBbot

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

🇺🇸 N722FR - Airbus A321 211SL - Frontier Airlines FFT1581/F91581, Richmond (RIC) to Denver (DEN) - 3.3 mi away @ 28700 ft, heading W at 467 mph. Spotted 66x before. [07:09:46 PM CST] #A9AB87 #N722FR #A321 #FRONTIER_FLIGHT #FFT1581 #F91581 #ADSB #ADSBbot

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

🇺🇸 N658FR - AIRBUS S A S A321-271NX - BANK OF UTAH TRUSTEE FFT1581/F91581, Richmond (RIC) to Denver (DEN) - 3.8 mi away @ 33400 ft, heading W at 496 mph. Spotted 5x before. [06:08:47 PM CST] #A8AAFF #N658FR #A21N #FFT1581 #F91581 #ADSB #ADSBbot