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