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

🇨🇦 C-GEHQ - Boeing 737MAX 8 - Air Canada ACA1276/AC1276, Phoenix Sky Harbor (PHX) to Montréal-Pierre Elliott Trudeau (YUL) - 4.5 mi away @ 39050 ft, heading ENE at 553 mph. Spotted 4x before! [12:31:34 PM CDT] #C04FFF #C_GEHQ #B38M #AIR_CANADA #ACA1276 #AC1276 #ADSB #ADSBbot