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

🇺🇸 N1802U - Boeing 737MAX 8 - Southwest Airlines SWA3108/WN3108 (MCO-MEM-DEN-LAS) - 4.5 mi away @ 39875 ft, heading E at 525 mph. Spotted 44x before! [11:08:43 PM CDT] #A1435D #N1802U #B38M #SOUTHWEST #SWA3108 #WN3108 #ADSB #ADSBbot