🇺🇸 N17437 - BOEING 737 MAX 9 - United Airlines UAL1983/UA1983, Miami (MIA) to Chicago O'Hare (ORD) - 3.8 mi away @ 29700 ft, heading N at 503 mph. Spotted for first time! [01:40:26 PM CDT] #A12AEA #N17437 #B39M #UNITED #UAL1983 #UA1983 #ADSB #ADSBbot