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

🇺🇸 N13138 - Boeing 757 224/W - United Airlines UAL1844/UA1844, Newark Liberty (EWR) to San Francisco (SFO) - 5.2 mi away @ 37850 ft, heading W at 521 mph. Spotted 5x before! [07:28:46 PM CDT] #A081CA #N13138 #B752 #UNITED #UAL1844 #UA1844 #ADSB #ADSBbot