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

🇺🇸 N900UW - Airbus A321 231SL - American Airlines AAL3301/AA3301, Charlotte/Douglas (CLT) to San Francisco (SFO) - 5.6 mi away @ 31600 ft, heading WNW at 571 mph. Spotted 10x before! [08:51:00 PM CDT] #AC7103 #N900UW #A321 #AMERICAN #AAL3301 #AA3301 #ADSB #ADSBbot