🇺🇸 N14231 - Boeing 737NG 824/W - United Airlines UAL1538/UA1538, Frederick W Smith/Memphis (MEM) to Chicago O'Hare (ORD) - 5.5 mi away @ 38850 ft, heading NNE at 560 mph. Spotted 23x before. [08:04:11 AM CDT] #A0ACF9 #N14231 #B738 #UNITED #UAL1538 #UA1538 #ADSB #ADSBbot