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

🇺🇸 N815UA - Airbus A319 131 - United Airlines UAL8210/UA8210 (PDX-SFO-IAD) - 4.4 mi away @ 33900 ft, heading SW at 364 mph. Spotted 19x before! [10:15:14 AM CST] #AB1DB2 #N815UA #A319 #UNITED #UAL8210 #UA8210 #ADSB #ADSBbot