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

🇺🇸 N27260 - Boeing 737MAX 8 - United Airlines UAL448/UA448 (BNA-SFO-ONT) - 4.5 mi away @ 36250 ft, heading NW at 548 mph. Spotted 12x before! [03:38:10 PM CDT] #A2B12D #N27260 #B38M #UNITED #UAL448 #UA448 #ADSB #ADSBbot