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

🇺🇸 N499AM - BOEING 737 MAX 9 - UMB BANK NA TRUSTEE AMX687/AM687, Chicago O'Hare (ORD) to Licenciado Benito Juarez (MEX) - 4.2 mi away @ 34625 ft, heading SSW at 506 mph. Spotted once before. [03:51:44 PM CST] #A63193 #N499AM #B39M #AMX687 #AM687 #ADSB #ADSBbot

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

🇺🇸 N499AM - BOEING 737 MAX 9 - UMB BANK NA TRUSTEE AMX687/AM687, Chicago O'Hare (ORD) to Licenciado Benito Juarez (MEX) - 3.6 mi away @ 30450 ft, heading SSW at 568 mph. Spotted for first time! [03:44:31 PM CST] #A63193 #N499AM #B39M #AMX687 #AM687 #ADSB #ADSBbot