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

🇺🇸 N8897K - Boeing 737MAX 8 - Southwest Airlines SWA4270/WN4270, Baltimore/Washington Thurgood Marshall (BWI) to Salt Lake City (SLC) - 5.0 mi away @ 38400 ft, heading W at 524 mph. Spotted 49x before! [09:32:23 PM CDT] #AC429B #N8897K #B38M #SOUTHWEST #SWA4270 #WN4270 #ADSB #ADSBbot