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ICAO: A25B3F
Owner: ALASKAAIRLINES
Flt: ASA460 N251AK B739 SEA-BOS
Time: 2026-04-08 23:15:35 EDT
Min Alt: 7850 ft
Min Dist: 1.01 nm (13deg NNE)

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ICAO: A25B3F
Owner: ALASKA AIRLINES
Flt: ASA306 N251AK B739 SEA-BOS-SEA
Time: 2025-12-09 16:38:51 EST
Min Alt: 9725 ft
Min Dist: 1.01 nm (25° NNE)
Loudness: 1 dB
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ICAO: A25B3F
Owner: ALASKA AIRLINES
Flt: ASA249 N251AK B739 SFO-BOS
Time: 2025-10-19 15:29:02 EDT
Min Alt: 10200 ft
Min Dist: 6.88 km (-65° WNW)
Loudness: -1 dB
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ICAO: A25B3F
Owner: ALASKA AIRLINES
Flt: ASA249 N251AK B739 SFO-BOS
Time: 2025-10-19 15:34:09 EDT
Min Alt: 5925 ft
Min Dist: 2.3 km (77° ENE)
Loudness: -1 dB
dev adsb planefence by kx1t -•sdr-e•airplanes•flightaware•faa

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ICAO: A25B3F
Owner: ALASKA AIRLINES
Flt: ASA249 N251AK B739 SFO-BOS
Time: 2025-10-19 15:34:14 EDT
Min Alt: 5925 ft
Min Dist: 2.53 km (82° E)
Loudness: 0 dB
dev adsb planefence by kx1t -•sdr-e•airplanes•flightaware•faa

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ICAO: A25B3F
Owner: ALASKA AIRLINES
Flt: ASA249 N251AK B739 SFO-BOS
Time: 2025-10-12 17:21:00 EDT
Min Alt: 5750 ft
Min Dist: 9.5 km (62° ENE)
Loudness: 0 dB
dev adsb planefence by kx1t -•sdr-e•airplanes•flightaware•faa

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

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

🇺🇸 N251AK - Boeing 737NG 990ER/W - Alaska Airlines ASA473/AS473, St Louis Lambert (STL) to Seattle-Tacoma (SEA) - 3.4 mi away @ 13775 ft, heading NW at 436 mph. Spotted 10x before! [06:20:46 AM CDT] #A25B3F #N251AK #B739 #ALASKA #ASA473 #AS473 #TakingOff #Departure #ADSB #ADSBbot

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

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

🇺🇸 N251AK - Boeing 737NG 990ER/W - Alaska Airlines ASA473/AS473, St Louis Lambert (STL) to Seattle-Tacoma (SEA) - 3.4 mi away @ 13150 ft, heading NW at 389 mph. Spotted 9x before! [06:26:48 AM CDT] #A25B3F #N251AK #B739 #ALASKA #ASA473 #AS473 #TakingOff #Departure #ADSB #ADSBbot

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