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

🇺🇸 N829UA - Airbus A319 131 - United Airlines UAL1451/UA1451, Denver (DEN) to Greenville Spartanburg (GSP) - 4.9 mi away @ 38350 ft, heading ESE at 555 mph. Spotted 44x before! [12:44:23 PM CDT] #AB540D #N829UA #A319 #UNITED #UAL1451 #UA1451 #ADSB #ADSBbot