🇺🇸 N8555Z - Boeing 737NG 800/W - Southwest Airlines SWA4974/WN4974, Ronald Reagan Washington Ntl (DCA) to St Louis Lambert (STL) - 4.2 mi away @ 5000 ft, heading WNW at 222 mph. Spotted 109x before. [04:02:51 PM CDT] #ABBD0A #N8555Z #B738 #SOUTHWEST #SWA4974 #WN4974 #Landing #Arrival #ADSB #ADSBbot