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

🇺🇸 N660FR - AIRBUS S A S A321-271NX - Frontier Airlines FFT3243/F93243, Chicago O'Hare (ORD) to Dallas-Fort Worth (DFW) - 4.2 mi away @ 33525 ft, heading SW at 508 mph. Spotted 4x before! [10:12:42 AM CST] #A8B4C6 #N660FR #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.

🇺🇸 N660FR - AIRBUS S A S A321-271NX - Frontier Airlines FFT3175/F93175, Detroit Metro Wayne County (DTW) to Dallas-Fort Worth (DFW) - 4.4 mi away @ 36300 ft, heading SW at 500 mph. Spotted 3x before! [07:41:54 PM CDT] #A8B4C6 #N660FR #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.

🇺🇸 N660FR - AIRBUS S A S A321-271NX - Frontier Airlines FFT4741/F94741 - 3.3 mi away @ 8275 ft, heading SW at 336 mph. Spotted 2x before! [08:43:47 PM CDT] #A8B4C6 #N660FR #A21N #FRONTIER_FLIGHT #FFT4741 #F94741 #TakingOff #ADSB #ADSBbot

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

🇺🇸 N660FR - AIRBUS S A S A321-271NX - Frontier Airlines FFT4742/F94742, Dallas-Fort Worth (DFW) to St Louis Lambert (STL) - 3.3 mi away @ 8275 ft, heading E at 316 mph. Spotted once before! [07:10:50 PM CDT] #A8B4C6 #N660FR #A21N #FRONTIER_FLIGHT #FFT4742 #F94742 #Landing #Arrival #ADSB #ADSBbot

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

🇺🇸 N660FR - AIRBUS S A S A321-271NX - BANK OF UTAH TRUSTEE FFT1401/F91401, Nashville (BNA) to Denver (DEN) - 3.9 mi away @ 31025 ft, heading WNW at 470 mph. Spotted for first time! [09:05:28 PM CDT] #A8B4C6 #N660FR #A21N #FFT1401 #F91401 #ADSB #ADSBbot