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

🇲🇽 XA-PPP - Boeing 737NG 8JP/W - AeroMexico AMX653/AM653, Chicago O'Hare (ORD) to Don Miguel Hidalgo Y Costilla (GDL) - 4.7 mi away @ 37875 ft, heading SW at 530 mph. Spotted once before! [02:51:28 PM CDT] #0D0C8F #XA_PPP #B738 #AEROMEXICO #AMX653 #AM653 #ADSB #ADSBbot