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

🇨🇦 C-GWSA - Boeing 737NG 8CT/W - WestJet WJA1426/WS1426, Calgary (YYC) to Nashville (BNA) - 5.4 mi away @ 38500 ft, heading SE at 518 mph. Spotted once before! [03:30:22 PM CDT] #C08095 #C_GWSA #B738 #WESTJET #WJA1426 #WS1426 #ADSB #ADSBbot