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

🇺🇸 N8988S - SOUTHWEST AIRLINES CO SWA4778/WN4778, Phoenix Sky Harbor (PHX) to St Louis Lambert (STL) - 3.3 mi away @ 8175 ft, heading E at 334 mph. Spotted 5x before. [09:25:07 PM CDT] #AC668D #N8988S #B38M #SWA4778 #WN4778 #Landing #Arrival #ADSB #ADSBbot