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

🇺🇸 N8903H - Boeing 737MAX 8 - Southwest Airlines SWA3581/WN3581 (SFO-LAS-SDF) - 4.1 mi away @ 35575 ft, heading ESE at 617 mph. Spotted 66x before! [09:46:16 PM CST] #AC481D #N8903H #B38M #SOUTHWEST #SWA3581 #WN3581 #ADSB #ADSBbot