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

🇺🇸 N957XV - Airbus A321 253NSL - American Airlines AAL3037/AA3037, Seattle-Tacoma (SEA) to Charlotte/Douglas (CLT) - 3.9 mi away @ 34875 ft, heading ESE at 635 mph. Spotted for first time! [03:19:43 AM CST] #AD50C9 #N957XV #A21N #AMERICAN #AAL3037 #AA3037 #ADSB #ADSBbot