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

🇺🇸 N302UD - BOEING 737-8 - AMERICAN AIRLINES INC AAL3125/AA3125, Charlotte/Douglas (CLT) to Bozeman Yellowstone (BZN) - 3.9 mi away @ 33550 ft, heading WNW at 526 mph. Spotted once before! [10:01:12 AM CDT] #A32886 #N302UD #B38M #AAL3125 #AA3125 #ADSB #ADSBbot