ASA521

For travellers

Departure · Seattle (SEA)

Gate C11

Scheduled 16:32

Board status: On-Time

Airborne since 16:40 (ADS-B)

Board data from sea, updated 39 min ago; times local to each airport.

Flight

Status

In progress

Departure

Seattle Tacoma International Airport (SEA) — Seattle, United States

Scheduled departure

2026-10-02 23:32 UTC

Departed

2026-10-02 23:40 UTC

Arrival

Norman Y. Mineta San Jose International Airport (SJC) — San Jose, United States (scheduled)

Progress

4% · ~2h 9m remaining

Also flies as

AS521

Distance flown

46 km

Straight-line distance

1122 km

Aircraft

Registration

N238AK

Type

Boeing 737-900

Seats

178 total (138 Economy, 24 Premium, 16 First)

CO2 (EMEP est., total)

30.9 t (180 kg/pax Economy, 202 kg/pax Premium Economy, 292 kg/pax Business, 542 kg/pax First)

Altitude & speed

Max altitude

11,050 ft

Max ground speed

278 kt

Tracked

6m · 46 km

Note

still in progress - the track so far

Altitude (ft, max 11,050)

Ground speed (kt, max 278)

Altitude (ft, max 11,050)

Ground speed (kt, max 278)

From the ADS-B positions we received; time since the first fix. A dashed stretch is a gap in reception, bridged by a straight line.

Route map

Airline

Alaska Airlines (ASA)

Latest flights

Departed	Flight	Route	Reg	Aircraft	Status	Distance
2026-10-02 23:40 UTC	ASA521	SEA → SJC Seattle → San Jose	N238AK	Boeing 737-900	In progress	~1122 km est.
2026-10-01 23:37 UTC	ASA521	SEA → SJC Seattle → San Jose	N494AS	Boeing 737-900	Completed	1266 km
2026-09-30 23:45 UTC	ASA521	SEA → SJC Seattle → San Jose	N474AS	Boeing 737-900	Completed	1270 km
2026-09-29 23:44 UTC	ASA521	SEA → SJC Seattle → San Jose	N934AK	Boeing 737 MAX 9	Completed	1249 km
2026-09-28 23:34 UTC	ASA521	SEA → SJC Seattle → San Jose	N442AS	Boeing 737-900	Completed	1247 km
2026-09-27 23:25 UTC	ASA521	SEA → SJC Seattle → San Jose	N968AK	Boeing 737 MAX 9	Completed	1265 km
2026-09-26 23:48 UTC	ASA521	SEA → SJC Seattle → San Jose	N585AS	Boeing 737-800	Completed	1251 km
2026-09-25 23:58 UTC	ASA521	SEA → SJC Seattle → San Jose	N958AK	Boeing 737 MAX 9	Completed	1240 km
2026-09-24 23:47 UTC	ASA521	SEA → SJC Seattle → San Jose	N457AS	Boeing 737-900	Completed	1259 km
2026-09-23 23:44 UTC	ASA521	SEA → SJC Seattle → San Jose	N585AS	Boeing 737-800	Completed	1245 km
2026-09-22 23:40 UTC	ASA521	SEA → SJC Seattle → San Jose	N972AK	Boeing 737 MAX 9	Completed	1249 km
2026-09-21 23:36 UTC	ASA521	SEA → SJC Seattle → San Jose	N921AK	Boeing 737 MAX 9	Completed	1270 km
2026-09-20 23:34 UTC	ASA521	SEA → SJC Seattle → San Jose	N236AK	Boeing 737-900	Completed	1267 km
2026-09-19 23:25 UTC	ASA521	SEA → SJC Seattle → San Jose	N527AS	Boeing 737-800	Completed	1304 km
2026-09-19 00:19 UTC	ASA521	SEA → SJC Seattle → San Jose	N298AK	Boeing 737-900	Completed	1277 km
2026-09-17 23:26 UTC	ASA521	SEA → SJC Seattle → San Jose	N712AL	Boeing 737 MAX 9	Completed	1334 km
2026-09-16 23:27 UTC	ASA521	SEA → SJC Seattle → San Jose	N734AL	Boeing 737 MAX 9	Completed	1359 km
2026-09-15 23:56 UTC	ASA521	SEA → SJC Seattle → San Jose	N723AL	Boeing 737 MAX 9	Completed	1302 km
2026-09-14 23:48 UTC	ASA521	SEA → SJC Seattle → San Jose	N938AK	Boeing 737 MAX 9	Completed	1322 km
2026-09-13 23:28 UTC	ASA521	SEA → SJC Seattle → San Jose	N491AS	Boeing 737-900	Completed	1337 km
2026-09-12 23:31 UTC	ASA521	SEA → SJC Seattle → San Jose	N977AK	Boeing 737 MAX 9	Completed	1369 km
2026-09-11 23:35 UTC	ASA521	SEA → SJC Seattle → San Jose	N248AK	Boeing 737-900	Completed	1381 km
2026-09-10 23:35 UTC	ASA521	SEA → SJC Seattle → San Jose	N428AS	Boeing 737-900	Completed	1362 km
2026-09-09 23:33 UTC	ASA521	SEA → SJC Seattle → San Jose	N553AS	Boeing 737-800	Completed	1337 km
2026-09-08 00:17 UTC	ASA521	SEA → SJC Seattle → San Jose	N284AK	Boeing 737-900	Completed	1352 km
2026-09-06 23:53 UTC	ASA521	SEA → SJC Seattle → San Jose	N407AS	Boeing 737-900	Completed	1312 km
2026-09-05 23:58 UTC	ASA521	SEA → SJC Seattle → San Jose	N801AK	Boeing 737 MAX 8	Completed	1301 km
2026-09-04 23:44 UTC	ASA521	SEA → SJC Seattle → San Jose	N472AS	Boeing 737-900	Completed	1279 km
2026-09-03 23:30 UTC	ASA521	SEA → SJC Seattle → San Jose	N924AK	Boeing 737 MAX 9	Completed	1302 km
2026-09-02 23:54 UTC	ASA521	SEA → SJC Seattle → San Jose	N237AK	Boeing 737-900	Completed	1283 km
2026-09-01 23:41 UTC	ASA521	SEA → SJC Seattle → San Jose	N614AS	Boeing 737-700	Completed	1286 km
2026-08-31 23:38 UTC	ASA521	SEA → SJC Seattle → San Jose	N977AK	Boeing 737 MAX 9	Completed	1347 km
2026-08-30 23:36 UTC	ASA521	SEA → SJC Seattle → San Jose	N277AK	Boeing 737-900	Completed	1321 km
2026-08-29 23:28 UTC	ASA521	SEA → SJC Seattle → San Jose	N518AS	Boeing 737-800	Completed	1306 km
2026-08-29 00:02 UTC	ASA521	SEA → SJC Seattle → San Jose	N528AS	Boeing 737-800	Completed	1310 km
2026-08-27 23:33 UTC	ASA521	SEA → SJC Seattle → San Jose	N491AS	Boeing 737-900	Completed	1287 km
2026-08-26 23:30 UTC	ASA521	SEA → SJC Seattle → San Jose	N494AS	Boeing 737-900	Completed	1311 km
2026-08-25 23:36 UTC	ASA521	SEA → SJC Seattle → San Jose	N247AK	Boeing 737-900	Completed	1288 km
2026-08-24 23:44 UTC	ASA521	SEA → SJC Seattle → San Jose	N961AK	Boeing 737 MAX 9	Completed	1366 km
2026-08-24 00:26 UTC	ASA521	SEA → SJC Seattle → San Jose	N946AK	Boeing 737 MAX 9	Completed	1328 km
2026-08-22 23:23 UTC	ASA521	SEA → SJC Seattle → San Jose	N457AS	Boeing 737-900	Completed	2007 km
2026-08-20 23:53 UTC	ASA521	SEA → SJC Seattle → San Jose	N442AS	Boeing 737-900	Completed	1615 km
2026-08-20 00:37 UTC	ASA521	SEA → SJC Seattle → San Jose	N487AS	Boeing 737-900	Completed	~2692 km est. (1680 km recorded)
2026-08-18 21:10 UTC	ASA521	SJC → SEA San Jose → Seattle	N570AS	Boeing 737-800	Completed	~2792 km est. (2230 km recorded)
2026-08-17 21:05 UTC	ASA521	SJC → SEA San Jose → Seattle	N713AL	Boeing 737 MAX 9	Completed	1653 km
2026-08-16 21:10 UTC	ASA521	SJC → SEA San Jose → Seattle	N284AK	Boeing 737-900	Completed	1869 km
2026-08-14 21:14 UTC	ASA521	SJC → SEA San Jose → Seattle	N268AK	Boeing 737-900	Completed	~4477 km est. (1910 km recorded)
2026-08-12 21:21 UTC	ASA521	SJC → SEA San Jose → Seattle	N920AK	Boeing 737 MAX 9	Completed	1326 km
2026-08-10 22:15 UTC	ASA521	SJC → SJC San Jose → San Jose	N719AL	Boeing 737 MAX 9	Completed	~1 km est. (0 km recorded)
2026-08-10 22:15 UTC	ASA521	SJC → SJC San Jose → San Jose	N719AL	Boeing 737 MAX 9	Completed	~1 km est. (0 km recorded)