Map of the St. Louis area showing the position and track of the aircraft described in the post.

🇺🇸 N37325 - Boeing 737MAX 8 - United Airlines UAL2142/UA2142, San Francisco (SFO) to Baltimore/Washington Thurgood Marshall (BWI) - 3.8 mi away @ 30875 ft, heading ENE at 596 mph. Spotted 3x before! [05:22:05 AM CDT] #A441AC #N37325 #B38M #UNITED #UAL2142 #UA2142 #ADSB #ADSBbot

Map of the St. Louis area showing the position and track of the aircraft described in the post.

🇺🇸 N17564 - Boeing 737MAX 9 - United Airlines UAL2142/UA2142, Washington Dulles (IAD) to San Francisco (SFO) - 3.9 mi away @ 34400 ft, heading W at 495 mph. Spotted 6x before! [05:03:36 PM CDT] #A12F07 #N17564 #B39M #UNITED #UAL2142 #UA2142 #ADSB #ADSBbot