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

🇺🇸 N939NN - Boeing 737NG 823/W - American Airlines AAL2029/AA2029, Dallas-Fort Worth (DFW) to Ronald Reagan Washington Ntl (DCA) - 4.1 mi away @ 34900 ft, heading NE at 694 mph. Spotted 51x before. [09:56:31 AM CST] #AD0851 #N939NN #B738 #AMERICAN #AAL2029 #AA2029 #ADSB #ADSBbot