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

🇺🇸 N357TY - Boeing 737MAX 8 - American Airlines AAL1806/AA1806 (DFW-LGA-DFW) - 4.3 mi away @ 33575 ft, heading ENE at 614 mph. Spotted for first time! [03:05:01 PM CST] #A4008E #N357TY #B38M #AMERICAN #AAL1806 #AA1806 #ADSB #ADSBbot