#UAL521
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aboveayer.bsky.social
#Planefence ICAO: A12AE6
Flt: UAL521 #UNITEDAIRLINES #JFK - #SFO
First seen: 2026-09-24 00:14:15 EDT
Min Alt: 11400 ft MSL
Min Dist: 1.87 mi
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September 24, 2026 at 4:18 AM
kx1t-test.bsky.social
ICAO-code: #A12AE6
Eigenaar: #UNITEDAIRLINES
Vluuch: #UAL521 #N17433 #B39M #IAH-#BOS
Tied: 2026-09-24 00:17:33 EDT
Min. heugde: 9450 ft
Min. aafstaand: 1.01 nm (25deg NNE)

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September 24, 2026 at 4:27 AM
aboveayer.bsky.social
#Planefence ICAO: A2BC12
Flt: UAL521 #UNITEDAIRLINES #JFK - #SFO
First seen: 2026-09-22 23:02:05 EDT
Min Alt: 11775 ft MSL
Min Dist: 1.87 mi
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September 23, 2026 at 3:05 AM
aboveayer.bsky.social
#Planefence ICAO: A12AE4
Flt: UAL521 #UNITEDAIRLINES #JFK - #SFO
First seen: 2026-09-21 22:58:35 EDT
Min Alt: 11525 ft MSL
Min Dist: 1.87 mi
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September 22, 2026 at 3:06 AM
aboveayer.bsky.social
#Planefence ICAO: A76028
Flt: UAL521 #UNITEDAIRLINES #JFK - #SFO
First seen: 2026-05-27 22:57:38 EDT
Min Alt: 11550 ft MSL
Min Dist: 1.88 mi
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May 28, 2026 at 3:09 AM
kx1t-test.bsky.social
ICAO: #A12777
Owner: #UNITEDAIRLINES
Flt: #UAL521 #N17355 #B38M #ATL-#IAH-#BOS
Time: 2026-05-12 23:04:02 EDT
Min Alt: 7675 ft
Min Dist: 4.2 nm (7deg N)
Squawk: #7227
#dev #adsb #planefence by kx1t - sdr-e airplanes flightaware faa
May 13, 2026 at 3:16 AM
kx1t-test.bsky.social
ICAO: #A2B12E
Owner: #UNITEDAIRLINES
Flt: #UAL521 #N27261 #B38M #ATL-#IAH-#BOS
Time: 2026-03-22 23:26:36 EDT
Min Alt: 9425 ft
Min Dist: 1 nm (26deg NNE)
Squawk: #2522
#dev #adsb #planefence by kx1t - sdr-e airplanes flightaware faa
March 23, 2026 at 3:33 AM
kx1t-test.bsky.social
ICAO: #AAA593
Owner: #UNITEDAIRLINES
Flt: #UAL521 #N78509 #B738 #ATL-#IAH-#BOS
Time: 2026-03-21 23:11:49 EDT
Min Alt: 8675 ft
Min Dist: 0.8 nm (49deg NE)
Squawk: #7474
#dev #adsb #planefence by kx1t - sdr-e airplanes flightaware faa
March 22, 2026 at 3:19 AM
kx1t-test.bsky.social
ICAO: #A5B55F
Owner: #UNITEDAIRLINES
Flt: #UAL521 #N467UA #A320 #ATL-#IAH-#BOS
Time: 2026-04-21 22:58:03 EDT
Min Alt: 8125 ft
Min Dist: 1.01 nm (23deg NNE)

#dev #adsb #planefence by kx1t - sdr-e airplanes flightaware faa
April 22, 2026 at 3:05 AM
kx1t-test.bsky.social
ICAO: #A5C694
Owner: #UNITEDAIRLINES
Flt: #UAL521 #N471UA #A320 #ATL-#IAH-#BOS
Time: 2026-04-09 23:22:52 EDT
Min Alt: 7475 ft
Min Dist: 1.02 nm (23deg NNE)

#dev #adsb #planefence by kx1t - sdr-e airplanes flightaware faa
April 10, 2026 at 3:29 AM
kx1t-test.bsky.social
ICAO: #A12777
Owner: #UNITEDAIRLINES
Flt: #UAL521 #N17355 #B38M #ATL-#IAH-#BOS
Time: 2026-05-12 23:04:02 EDT
Min Alt: 7675 ft
Min Dist: 4.2 nm (7deg N)
Squawk: #7227
#dev #adsb #planefence by kx1t - sdr-e airplanes flightaware faa
May 13, 2026 at 3:13 AM
aboveayer.bsky.social
#Planefence ICAO: A12F52
Flt: UAL521 #UNITEDAIRLINES #JFK - #SFO
First seen: 2026-09-18 23:15:42 EDT
Min Alt: 11575 ft MSL
Min Dist: 1.86 mi
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September 19, 2026 at 3:20 AM
aboveayer.bsky.social
#Planefence ICAO: AA7F2B
Flt: UAL521 #UNITEDAIRLINES #JFK - #SFO
First seen: 2026-09-18 00:18:20 EDT
Min Alt: 10700 ft MSL
Min Dist: 1.88 mi
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September 18, 2026 at 4:22 AM
kx1t-test.bsky.social
ICAO-code: #AA7F2B
Eigenaar: #UNITEDAIRLINES
Vluuch: #UAL521 #N77588 #B39M #IAH-#BOS
Tied: 2026-09-18 00:21:13 EDT
Min. heugde: 8025 ft
Min. aafstaand: 1.01 nm (28deg NNE)
Transpondercode: #2564
#dev #adsb #planefence by kx1t - sdr-e airplanes flightaware faa
September 18, 2026 at 5:02 AM
aboveayer.bsky.social
#Planefence ICAO: AA7EC2
Flt: UAL521 #UNITEDAIRLINES #JFK - #SFO
First seen: 2026-09-16 23:08:59 EDT
Min Alt: 10400 ft MSL
Min Dist: 1.88 mi
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September 17, 2026 at 3:19 AM
aboveayer.bsky.social
#Planefence ICAO: A44917
Flt: UAL521 #UNITEDAIRLINES
First seen: 2026-09-15 22:49:21 EDT
Min Alt: 10700 ft MSL
Min Dist: 1.87 mi
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September 16, 2026 at 2:58 AM
aboveayer.bsky.social
#Planefence ICAO: A2BBAC
Flt: UAL521 #UNITEDAIRLINES #JFK - #SFO
First seen: 2026-09-14 22:57:50 EDT
Min Alt: 11500 ft MSL
Min Dist: 1.87 mi
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September 15, 2026 at 3:03 AM
aboveayer.bsky.social
#Planefence ICAO: A760B3
Flt: UAL521 #UNITEDAIRLINES #JFK - #SFO
First seen: 2026-09-11 22:44:00 EDT
Min Alt: 11600 ft MSL
Min Dist: 1.87 mi
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September 12, 2026 at 2:51 AM
abovestlouis.com
🇺🇸 N17550 - Boeing 737MAX 9 - United Airlines UAL521/UA521, George Bush Intcntl/Houston (IAH) to General Edward Lawrence Logan (BOS) - 4.7 mi away @ 35300 ft, heading NE at 546 mph. Spotted 8x before. [08:19:38 PM CDT] #A12EE0 #N17550 #B39M #UNITED #UAL521 #UA521 #ADSB #ADSBbot
Map of the St. Louis area showing the position and track of the aircraft described in the post.
September 9, 2026 at 1:19 AM
aboveayer.bsky.social
#Planefence ICAO: A12EE0
Flt: UAL521 #UNITEDAIRLINES #JFK - #SFO
First seen: 2026-09-08 23:11:38 EDT
Min Alt: 10925 ft MSL
Min Dist: 1.95 mi
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September 9, 2026 at 3:22 AM
aboveayer.bsky.social
#Planefence ICAO: A2B8C4
Flt: UAL521 #UNITEDAIRLINES #JFK - #SFO
First seen: 2026-09-04 23:13:46 EDT
Min Alt: 11800 ft MSL
Min Dist: 1.87 mi
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September 5, 2026 at 3:26 AM
aboveayer.bsky.social
#Planefence ICAO: A2BBA4
Flt: UAL521 #UNITEDAIRLINES #JFK - #SFO
First seen: 2026-09-03 23:30:04 EDT
Min Alt: 10875 ft MSL
Min Dist: 1.87 mi
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September 4, 2026 at 3:33 AM
aboveayer.bsky.social
#Planefence ICAO: A12B2E
Flt: UAL521 #UNITEDAIRLINES #JFK - #SFO
First seen: 2026-08-30 23:32:47 EDT
Min Alt: 10700 ft MSL
Min Dist: 1.89 mi
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August 31, 2026 at 3:48 AM
aboveayer.bsky.social
#Planefence ICAO: A5CF66
Flt: UAL521 #UNITEDAIRLINES #JFK - #SFO
First seen: 2026-08-29 22:57:17 EDT
Min Alt: 10750 ft MSL
Min Dist: 0.39 mi
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August 30, 2026 at 3:01 AM
aboveayer.bsky.social
#Planefence ICAO: A2B7F5
Flt: UAL521 #UNITEDAIRLINES #JFK - #SFO
First seen: 2026-08-22 01:02:21 EDT
Min Alt: 11675 ft MSL
Min Dist: 1.88 mi
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August 22, 2026 at 5:06 AM