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

🇺🇸 N27323 - Boeing 737MAX 8 - United Airlines UAL363/UA363, Baltimore/Washington Thurgood Marshall (BWI) to San Francisco (SFO) - 5.9 mi away @ 35300 ft, heading W at 501 mph. Spotted 4x before! [09:45:26 AM CDT] #A2B45B #N27323 #B38M #UNITED #UAL363 #UA363 #ADSB #ADSBbot