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

🇨🇦 C-FSDB - Boeing 737MAX 8 - Air Canada ACA991/AC991, Toronto Pearson (YYZ) to Licenciado Benito Juarez (MEX) - 3.4 mi away @ 30625 ft, heading S at 482 mph. Spotted 4x before! [11:26:32 AM CDT] #C02FD8 #C_FSDB #B38M #AIR_CANADA #ACA991 #AC991 #ADSB #ADSBbot