ICAO: A21ED4
Owner: ALASKAAIRLINES
Flt: ASA306 N236AK B739 SEA-BOS-#SEA
Time: 2026-04-10 16:28:24 EDT
Min Alt: 8875 ft
Min Dist: 2.1 nm (0deg N)
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ICAO: A21ED4
Owner: ALASKAAIRLINES
Flt: ASA389 N236AK B739 BOS-SAN
Time: 2026-03-28 19:23:29 EDT
Min Alt: 2600 ft
Min Dist: 0.3 mi (52deg NE)
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ICAO: A21ED4
Owner: ALASKAAIRLINES
Flt: ASA390 N236AK B739 MCI-BOS
Time: 2026-03-28 17:32:26 EDT
Min Alt: 9075 ft
Min Dist: 0.99 nm (21deg NNE)
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ICAO: A21ED4
Owner: ALASKAAIRLINES
Flt: ASA390 N236AK B739 SAN-BOS
Time: 2026-03-26 15:48:21 EDT
Min Alt: 10125 ft
Min Dist: 1.01 nm (7deg N)
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ICAO: A21ED4
Owner: ALASKAAIRLINES
Flt: ASA306 N236AK B739 SEA-BOS-#SEA
Time: 2026-02-15 15:42:13 EST
Min Alt: 9275 ft
Min Dist: 0.99 nm (21deg NNE)
Squawk: 1614
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ICAO: A21ED4
Owner: ALASKA AIRLINES
Flt: ASA1319 N236AK B739 BOS-PDX
Time: 2026-01-29 17:44:18 EST
Min Alt: 3625 ft
Min Dist: 0.4 mi (15° NNE)
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ICAO: A21ED4
Owner: ALASKA AIRLINES
Flt: ASA306 N236AK B739 SEA-BOS-SEA
Time: 2026-01-29 16:04:18 EST
Min Alt: 9450 ft
Min Dist: 0.99 nm (22° NNE)
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ICAO: A21ED4
Owner: ALASKA AIRLINES
Flt: ASA356 N236AK B739 SFO-BOS
Time: 2025-12-19 15:20:12 EST
Min Alt: 8825 ft
Min Dist: 0.98 nm (16° NNE)
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Planefence ICAO: A21ED4
Flt: ASA1319 ALASKAAIRLINES SFO - PDX
First seen: 2025-12-19 17:38:03 EST
Min Alt: 2825 ft MSL
Min Dist: 0.32 mi
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Planefence ICAO: A21ED4
Flt: ASA537 ALASKAAIRLINES BOS - SEA
First seen: 2025-11-04 09:51:17 EST
Min Alt: 2500 ft MSL
Min Dist: 0.25 mi
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ICAO: A21ED4
Owner: ALASKA AIRLINES
Flt: ASA259 N236AK B739 SAN-BOS
Time: 2025-10-17 05:54:35 EDT
Min Alt: 9600 ft
Min Dist: 1.01 km (24° NNE)
Loudness: -1 dB
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Map of the St. Louis area showing the position and track of the aircraft described in the post.
🇺🇸 N236AK - Boeing 737NG 990ER/W - Alaska Airlines ASA473/AS473, St Louis Lambert (STL) to Seattle-Tacoma (SEA) - 3.3 mi away @ 12075 ft, heading NW at 382 mph. Spotted 4x before! [06:14:02 AM CDT] #A21ED4 #N236AK #B739 #ALASKA #ASA473 #AS473 #Landing #Departure #ADSB #ADSBbot
Planefence ICAO: A21ED4
Flt: ASA537 ALASKAAIRLINES BOS - SEA
First seen: 2025-07-29 09:45:53 EDT
Min Alt: 1975 ft MSL
Min Dist: 0.28 mi
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Planefence ICAO: A21ED4
Flt: ASA459 ALASKAAIRLINES BOS - SEA
First seen: 2025-06-29 08:05:30 EDT
Min Alt: 2200 ft MSL
Min Dist: 0.25 mi
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Planefence ICAO: A21ED4
Flt: ASA459 ALASKAAIRLINES BOS - SEA
First seen: 2025-05-18 08:05:59 EDT
Min Alt: 2475 ft MSL
Min Dist: 0.28 mi
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Planefence ICAO: A21ED4
Flt: ASA459 ALASKAAIRLINES BOS - SEA
First seen: 2025-04-16 07:14:04 EDT
Min Alt: 2800 ft MSL
Min Dist: 0.25 mi
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Planefence ICAO: A21ED4
Flt: ASA389 ALASKAAIRLINES SAN - SJC
First seen: 2025-03-27 17:00:11 EDT
Min Alt: 2075 ft MSL
Min Dist: 0.27 mi
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Planefence ICAO: A21ED4
Flt: ASA537 ALASKAAIRLINES BOS - SEA
First seen: 2025-02-21 10:31:20 EST
Min Alt: 2475 ft MSL
Min Dist: 0.34 mi
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Planefence ICAO: A21ED4
Flt: ASA389 ALASKAAIRLINES SAN - SJC
First seen: 2025/02/13 16:50:43
Min Alt: 2875 ft MSL
Min Dist: 0.28 mi
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