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

🇺🇸 N7855A - Boeing 737NG 79P/W - Southwest Airlines SWA846/WN846, St Louis Lambert (STL) to Des Moines (DSM) - 3.4 mi away @ 15125 ft, heading NW at 429 mph. Spotted 58x before! [10:16:17 PM CDT] #AAA621 #N7855A #B737 #SOUTHWEST #SWA846 #WN846 #Departure #ADSB #ADSBbot