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

🇺🇸 N53441 - Boeing 737NG 924ER/W - United Airlines UAL2156/UA2156 (IAD-LAS-SFO) - 4.0 mi away @ 33925 ft, heading W at 435 mph. Spotted 17x before. [01:39:51 PM CST] #A6C247 #N53441 #B739 #UNITED #UAL2156 #UA2156 #ADSB #ADSBbot

Planefence ICAO: A43E60
Flt: UAL2156 UNITEDAIRLINES IAH - SFO
First seen: 2025-10-03 20:46:06 EDT
Min Alt: 3750 ft MSL
Min Dist: 1.71 nm
adsb planefence by kx1t - airplanes.live - planefence

Planefence ICAO: A43E60
Flt: UAL2156 UNITEDAIRLINES IAH - SFO
First seen: 2025-10-03 20:46:30 EDT
Min Alt: 3600 ft MSL
Min Dist: 1.06 mi
adsb planefence by kx1t - adsbexchange - planefence