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

🇺🇸 N818NN - Boeing 737NG 823/W - American Airlines AAL2051/AA2051, Chicago O'Hare (ORD) to Licenciado Gustavo Diaz Ordaz (PVR) - 4.2 mi away @ 36975 ft, heading WSW at 422 mph. Spotted 54x before. [12:32:19 PM CDT] #AB284D #N818NN #B738 #AMERICAN #AAL2051 #AA2051 #ADSB #ADSBbot