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

🇺🇸 N27253 - Boeing 737MAX 8 - United Airlines UAL359/UA359, Chicago O'Hare (ORD) to Licenciado Benito Juarez (MEX) - 3.8 mi away @ 31650 ft, heading SW at 399 mph. Spotted 5x before. [11:14:49 AM CST] #A2B10D #N27253 #B38M #UNITED #UAL359 #UA359 #ADSB #ADSBbot

ICAO: A2B10D
Owner: UNITED AIRLINES
Flt: UAL521 N27253 B38M BOS-EWR
Time: 2025-12-01 18:39:33 EST
Min Alt: 8025 ft
Min Dist: 7.8 nm (146° SE)
dev adsb planefence by kx1t -•sdr-e•airplanes•flightaware•faa

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

🇺🇸 N27253 - Boeing 737MAX 8 - United Airlines UAL2660/UA2660 (STL-DEN-SBA) - 3.3 mi away @ 14375 ft, heading WNW at 423 mph. Spotted 4x before! [05:26:40 PM CDT] #A2B10D #N27253 #B38M #UNITED #UAL2660 #UA2660 #Landing #ADSB #ADSBbot

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

🇺🇸 N27253 - Boeing 737MAX 8 - United Airlines UAL350/UA350, Denver (DEN) to Tampa (TPA) - 4.5 mi away @ 34825 ft, heading ESE at 549 mph. Spotted 3x before! [04:14:28 PM CST] #A2B10D #N27253 #B38M #UNITED #UAL350 #UA350 #ADSB #ADSBbot