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

🇨🇦 C-GYSD - Boeing 737NG 8CT/W - WestJet WJA2612/WS2612, Winnipeg James Armstrong Richardson (YWG) to Cancun (CUN) - 4.1 mi away @ 35800 ft, heading SE at 520 mph. Spotted 3x before! [08:36:11 AM CST] #C085E0 #C_GYSD #B738 #WESTJET #WJA2612 #WS2612 #ADSB #ADSBbot