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

🇨🇦 C-FSIL - Boeing 737MAX 8 - Air Canada ACA527/AC527, Montréal-Pierre Elliott Trudeau (YUL) to San Diego (SAN) - 4.5 mi away @ 38200 ft, heading WSW at 514 mph. Spotted 2x before! [06:14:45 PM CDT] #C03064 #C_FSIL #B38M #AIR_CANADA #ACA527 #AC527 #ADSB #ADSBbot