Map of the St. Louis area showing the position and track of the aircraft described in the post.
🇺🇸 N35271 - Boeing 737NG 824/W - United Airlines UAL1842/UA1842, Chicago O'Hare (ORD) to San Antonio (SAT) - 4.3 mi away @ 37325 ft, heading SW at 431 mph. Spotted 18x before. [09:52:40 PM CST] #A3EFA2 #N35271 #B738 #UNITED #UAL1842 #UA1842 #ADSB #ADSBbot