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

🇨🇦 C-FKRF - Boeing 737NG 8CT/W - WestJet WJA1631/WS1631, Fort Lauderdale/Hollywood (FLL) to Calgary (YYC) - 4.3 mi away @ 36250 ft, heading NW at 438 mph. Spotted 4x before. [06:16:58 PM CDT] #C01C28 #C_FKRF #B738 #WESTJET #WJA1631 #WS1631 #ADSB #ADSBbot