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

🇺🇸 N14240 - Boeing 737NG 824/W - United Airlines UAL1229/UA1229, St Louis Lambert (STL) to Denver (DEN) - 5.1 mi away @ 17100 ft, heading WNW at 397 mph. Spotted 17x before. [04:38:18 PM CST] #A0AD1B #N14240 #B738 #UNITED #UAL1229 #UA1229 #Departure #ADSB #ADSBbot

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

🇺🇸 N872UA - Airbus A319 132 - United Airlines UAL1229/UA1229, St Louis Lambert (STL) to Denver (DEN) - 3.4 mi away @ 18025 ft, heading NW at 426 mph. Spotted 41x before. [03:36:27 PM CST] #ABFF87 #N872UA #A319 #UNITED #UAL1229 #UA1229 #Departure #ADSB #ADSBbot