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

🇺🇸 N989AU - Airbus A321 231SL - American Airlines AAL3244/AA3244, Chicago O'Hare (ORD) to San Francisco (SFO) - 4.3 mi away @ 35875 ft, heading SW at 535 mph. Spotted 14x before! [11:10:10 AM CDT] #ADCCA6 #N989AU #A321 #AMERICAN #AAL3244 #AA3244 #ADSB #ADSBbot