🇺🇸 N8534Z - Boeing 737NG 800/W - Southwest Airlines SWA937/WN937, Baltimore/Washington Thurgood Marshall (BWI) to Denver (DEN) - 4.7 mi away @ 37825 ft, heading W at 474 mph. Spotted 121x before. [04:12:31 PM CDT] #ABB579 #N8534Z #B738 #SOUTHWEST #SWA937 #WN937 #ADSB #ADSBbot