ICAO: A12EE7
Owner: UNITED AIRLINES
Flt: UAL1372 N17557 B39M SFO-BOS
Time: 2025-12-20 21:40:05 EST
Min Alt: 8175 ft
Min Dist: 1.8 nm (-15° NNW)
dev adsb planefence by kx1t -•sdr-e•airplanes•flightaware•faa

ICAO: A12EE7
Owner: UNITED AIRLINES
Flt: UAL337 N17557 B39M BOS-DEN
Time: 2025-11-29 19:26:07 EST
Min Alt: 7200 ft
Min Dist: 6.6 nm (66° ENE)
dev adsb planefence by kx1t -•sdr-e•airplanes•flightaware•faa

Planefence ICAO: A12EE7
Flt: UAL337 UNITEDAIRLINES DEN - DFW
First seen: 2025-11-29 19:24:00 EST
Min Alt: 1950 ft MSL
Min Dist: 0.28 mi
adsb planefence by kx1t - adsbexchange - planefence

ICAO: A12EE7
Owner: UNITED AIRLINES
Flt: UAL350 N17557 B39M IAH-BOS
Time: 2025-11-29 16:58:10 EST
Min Alt: 8975 ft
Min Dist: 0.99 nm (19° NNE)
Loudness: 0 dB
dev adsb planefence by kx1t -•sdr-e•airplanes•flightaware•faa

Planefence ICAO: A12EE7
Flt: UAL2016 UNITEDAIRLINES BDL - ORD
First seen: 2025-06-20 09:09:43 EDT
Min Alt: 3100 ft MSL
Min Dist: 0.98 mi
adsb planefence by kx1t - adsbexchange - planefence

Planefence ICAO: A12EE7
Flt: UAL2016 UNITEDAIRLINES BDL - ORD
First seen: 2025-06-20 09:10:21 EDT
Min Alt: 4925 ft MSL
Min Dist: 1.96 nm
adsb planefence by kx1t - airplanes.live - planefence

Planefence ICAO: A12EE7
Flt: UAL1976 UNITEDAIRLINES BOS - IAH
First seen: 2025-03-07 13:38:58 EST
Min Alt: 5000 ft MSL
Min Dist: 1.94 nm
adsb planefence by kx1t - airplanes.live - planefence

Planefence ICAO: A12EE7
Flt: UAL1976 UNITEDAIRLINES BOS - IAH
First seen: 2025-03-07 13:38:20 EST
Min Alt: 3550 ft MSL
Min Dist: 0.03 mi
adsb planefence by kx1t - adsbexchange - planefence

Planefence ICAO: A12EE7
Flt: UAL800 UNITEDAIRLINES EWR - MCO
First seen: 2025/01/26 17:04:40
Min Alt: 2775 ft MSL
Min Dist: 0.26 mi
adsb planefence by kx1t - adsbexchange - planefence

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

🇺🇸 N17557 - Boeing 737MAX 9 - United Airlines UAL2303/UA2303 (IAD-LAX-EWR) - 4.2 mi away @ 33675 ft, heading W at 446 mph. Spotted 3x before! [07:55:27 PM CST] #A12EE7 #N17557 #B39M #UNITED #UAL2303 #UA2303 #ADSB #ADSBbot