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

🇺🇸 N8618N - Boeing 737NG 8H4/W - Southwest Airlines SWA2485/WN2485, Phoenix Sky Harbor (PHX) to Chicago Midway (MDW) - 4.8 mi away @ 40800 ft, heading NE at 555 mph. Spotted 91x before! [10:18:37 PM CDT] #ABD60B #N8618N #B738 #SOUTHWEST #SWA2485 #WN2485 #ADSB #ADSBbot