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

🇺🇸 N771UA - Boeing 777 222 - United Airlines UAL1423/UA1423, Cancun (CUN) to Chicago O'Hare (ORD) - 4.7 mi away @ 37700 ft, heading N at 572 mph. Spotted 5x before! [05:22:17 PM CST] #AA6E81 #N771UA #B772 #UNITED #UAL1423 #UA1423 #ADSB #ADSBbot

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

🇺🇸 N771UA - Boeing 777 222 - United Airlines UAL1423/UA1423, Cancun (CUN) to Chicago O'Hare (ORD) - 4.3 mi away @ 37250 ft, heading N at 562 mph. Spotted 4x before! [05:07:45 PM CST] #AA6E81 #N771UA #B772 #UNITED #UAL1423 #UA1423 #ADSB #ADSBbot