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

🇺🇸 N8554X - Boeing 737NG 800/W - Southwest Airlines SWA1889/WN1889, Chicago O'Hare (ORD) to Austin-Bergstrom (AUS) - 4.7 mi away @ 36900 ft, heading SW at 460 mph. Spotted 81x before. [08:09:22 PM CDT] #ABBCE5 #N8554X #B738 #SOUTHWEST #SWA1889 #WN1889 #ADSB #ADSBbot