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

🇺🇸 N866AM - Boeing 737MAX 9 - AeroMexico AMX683/AM683, Chicago O'Hare (ORD) to Licenciado Benito Juarez (MEX) - 4.3 mi away @ 34925 ft, heading SSW at 508 mph. Spotted once before. [07:25:33 AM CST] #ABE52D #N866AM #B39M #AMX683 #AM683 #ADSB #ADSBbot