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

🇺🇸 N66814 - Boeing 737NG 924ER/W - United Airlines UAL1729/UA1729, Baltimore/Washington Thurgood Marshall (BWI) to Los Angeles (LAX) - 4.2 mi away @ 34275 ft, heading W at 380 mph. Spotted 7x before. [07:29:21 AM CST] #A8D489 #N66814 #B739 #UNITED #UAL1729 #UA1729 #ADSB #ADSBbot

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

🇺🇸 N78509 - Boeing 737NG 824/W - United Airlines UAL1729/UA1729 (LGA-DEN-SEA) - 4.6 mi away @ 37250 ft, heading W at 540 mph. Spotted 12x before! [06:10:37 PM CDT] #AAA593 #N78509 #B738 #UNITED #UAL1729 #UA1729 #ADSB #ADSBbot