ICAO: A1272D
Owner: UNITEDAIRLINES
Flt: UAL521 N17331 B38M ATL-IAH-BOS
Time: 2026-03-19 23:30:13 EDT
Min Alt: 8150 ft
Min Dist: 0.99 nm (19deg NNE)

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.

🇺🇸 N17331 - Boeing 737MAX 8 - United Airlines UAL1155/UA1155, Newark Liberty (EWR) to Austin-Bergstrom (AUS) - 4.9 mi away @ 38375 ft, heading SW at 439 mph. Spotted 12x before! [01:24:22 PM CST] #A1272D #N17331 #B38M #UNITED #UAL1155 #UA1155 #ADSB #ADSBbot

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

🇺🇸 N17331 - Boeing 737MAX 8 - United Airlines UAL1603/UA1603, San Francisco (SFO) to Indianapolis (IND) - 4.6 mi away @ 38825 ft, heading E at 571 mph. Spotted 11x before! [03:48:49 AM CDT] #A1272D #N17331 #B38M #UNITED #UAL1603 #UA1603 #ADSB #ADSBbot

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

🇺🇸 N17331 - Boeing 737MAX 8 - United Airlines UAL1952/UA1952, Juan Santamaria (SJO) to Chicago O'Hare (ORD) - 4.4 mi away @ 37050 ft, heading NNE at 572 mph. Spotted 10x before! [06:56:26 PM CDT] #A1272D #N17331 #B38M #UNITED #UAL1952 #UA1952 #ADSB #ADSBbot