🇺🇸 N8555Z - Boeing 737NG 800/W - Southwest Airlines SWA275/WN275, Phoenix Sky Harbor (PHX) to Baltimore/Washington Thurgood Marshall (BWI) - 5.6 mi away @ 37125 ft, heading E at 544 mph. Spotted 108x before. [02:15:28 PM CDT] #ABBD0A #N8555Z #B738 #SOUTHWEST #SWA275 #WN275 #ADSB #ADSBbot