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

🇲🇽 XA-VAX - Airbus A320 232SL - VivaAeroBus VIV868/VB868, General Francisco J. Mujica (MLM) to Chicago O'Hare (ORD) - 4.5 mi away @ 39100 ft, heading NNE at 541 mph. Spotted 34x before! [04:13:11 AM CDT] #0D0ACA #XA_VAX #A320 #VIVA #VIV868 #VB868 #ADSB #ADSBbot