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

🇺🇸 N780UA - Boeing 777 222 - United Airlines UAL1423/UA1423, Cancun (CUN) to Chicago O'Hare (ORD) - 4.8 mi away @ 37600 ft, heading NNE at 593 mph. Spotted 3x before! [04:58:38 PM CDT] #AA9249 #N780UA #B772 #UNITED #UAL1423 #UA1423 #ADSB #ADSBbot

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

🇺🇸 N780UA - Boeing 777 222 - United Airlines UAL1423/UA1423, Cancun (CUN) to Chicago O'Hare (ORD) - 4.2 mi away @ 35650 ft, heading NNE at 569 mph. Spotted 2x before! [05:22:10 PM CST] #AA9249 #N780UA #B772 #UNITED #UAL1423 #UA1423 #ADSB #ADSBbot