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

🇺🇸 N428WN - Boeing 737NG 7H4/W - Southwest Airlines SWA1549/WN1549, San Diego (SAN) to Baltimore/Washington Thurgood Marshall (BWI) - 4.4 mi away @ 35025 ft, heading E at 624 mph. Spotted 51x before! [10:30:34 PM CST] #A51B58 #N428WN #B737 #SOUTHWEST #SWA1549 #WN1549 #ADSB #ADSBbot