Map of the St. Louis area showing the position and track of the aircraft described in the post.
🇺🇸 N26210 - Boeing 737NG 824/W - United Airlines UAL1873/UA1873, Phoenix Sky Harbor (PHX) to Washington Dulles (IAD) - 4.6 mi away @ 37600 ft, heading E at 553 mph. Spotted 22x before. [12:28:21 PM CST] #A288FF #N26210 #B738 #UNITED #UAL1873 #UA1873 #ADSB #ADSBbot