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

🇺🇸 N14524 - Airbus A321 271NXSL - United Airlines UAL3048/UA3048, Cancun (CUN) to Chicago O'Hare (ORD) - 3.4 mi away @ 26600 ft, heading NNE at 579 mph. Spotted 3x before. [09:22:57 AM CST] #A0B7FE #N14524 #A21N #UNITED #UAL3048 #UA3048 #ADSB #ADSBbot