🇺🇸 N8533S - Boeing 737NG 800/W - Southwest Airlines SWA2491/WN2491, Phoenix Sky Harbor (PHX) to Baltimore/Washington Thurgood Marshall (BWI) - 5.0 mi away @ 38675 ft, heading E at 578 mph. Spotted 96x before. [02:30:39 PM CDT] #ABB54F #N8533S #B738 #SOUTHWEST #SWA2491 #WN2491 #ADSB #ADSBbot