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

🇺🇸 N29717 - Boeing 737NG 724/W - United Airlines UAL1086/UA1086, Charlotte/Douglas (CLT) to Chicago O'Hare (ORD) - 5.0 mi away @ 42275 ft, heading N at 530 mph. Spotted 30x before! [10:19:41 PM CDT] #A31216 #N29717 #B737 #UNITED #UAL1086 #UA1086 #ADSB #ADSBbot