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

🇺🇸 N129AA - Airbus A321 231SL - American Airlines AAL738/AA738, Los Angeles (LAX) to Philadelphia (PHL) - 4.3 mi away @ 36750 ft, heading E at 545 mph. Spotted 9x before! [05:00:56 PM CDT] #A07522 #N129AA #A321 #AMERICAN #AAL738 #AA738 #ADSB #ADSBbot