ICAO: A2B157
Owner: UNITED AIRLINES
Flt: UAL521 N27277 B38M BOS-EWR
Time: 2026-01-29 18:39:26 EST
Min Alt: 4925 ft
Min Dist: 0.4 mi (-130° SW)
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Map of the St. Louis area showing the position and track of the aircraft described in the post.

🇺🇸 N27277 - Boeing 737MAX 8 - United Airlines UAL1673/UA1673 (CLE-ORD-DFW) - 4.6 mi away @ 37425 ft, heading SW at 439 mph. Spotted 13x before. [09:41:18 PM CST] #A2B157 #N27277 #B38M #UNITED #UAL1673 #UA1673 #ADSB #ADSBbot

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

🇺🇸 N27277 - Boeing 737MAX 8 - United Airlines UAL2470/UA2470 (YVR-DEN-STL) - 3.8 mi away @ 7950 ft, heading E at 332 mph. Spotted 12x before! [10:10:09 PM CST] #A2B157 #N27277 #B38M #UNITED #UAL2470 #UA2470 #Landing #ADSB #ADSBbot

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

🇺🇸 N27277 - Boeing 737MAX 8 - United Airlines UAL1939/UA1939 (SFO-IND-IAD) - 4.9 mi away @ 38650 ft, heading E at 553 mph. Spotted 11x before! [03:13:56 PM CDT] #A2B157 #N27277 #B38M #UNITED #UAL1939 #UA1939 #ADSB #ADSBbot

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

🇺🇸 N27277 - Boeing 737MAX 8 - United Airlines UAL1261/UA1261 (SLC-EWR-AUS) - 4.7 mi away @ 38050 ft, heading SW at 490 mph. Spotted 10x before! [10:07:46 PM CDT] #A2B157 #N27277 #B38M #UNITED #UAL1261 #UA1261 #ADSB #ADSBbot