AS366: Alaska flight 366
Seattle (SEA) → Washington (IAD) · departs 3:56p, lands 11:59p local · Daily
The timetable below has every scheduled departure; for today's flight, check Alaska.
An estimate from the published timetable, not live tracking: it cannot know about delays, diversions or cancellations.
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AS366 timetable
Published departure and arrival times, each in its airport's local time, from the flights we sampled Oct 14–20.
| Route | Departs | Arrives | Scheduled | Days |
|---|---|---|---|---|
| SEA → IADSeattle to Washington | 3:56p | 11:59p | 5h3m | Daily |
Other nonstops from Seattle to Washington
The departures either side of AS366. Times are Seattle time.
| Flight | Departs | Days |
|---|---|---|
| Alaska AS737 | 8:15a | Daily |
| United UA1523 | 8:25a | Daily |
| Delta DL541 | 2:50p | Daily |
| This flight AS366 | 3:56p | Daily |
| Alaska AS367 | 9:36p | Mon, Thu, Fri, Sun |
| United UA2693 | 11:14p | Daily |
All 7 flights from SEA to IAD, by time →
Flying back from Washington
Alaska flies Washington to Seattle nonstop 18 times a week, from 7:02a to 5:33p: 7:02a AS409 · 9:38a AS375 · 5:33p AS737 · every nonstop IAD → SEA →
How AS366 ran in our sample
7 of 7 departures left within 15 minutes of schedule (Oct 14–20). Only flights that departed are counted: cancellations are not in our data.
Aircraft: Boeing 737-900 on 4 of 7; also Boeing 737 MAX 9 (3).
What time does AS366 leave Seattle?
AS366 is scheduled to depart Seattle (SEA) at 3:56p (daily), Seattle time, and to land in Washington (IAD) at about 11:59p local time, a scheduled 5h3m. Times are the published ones from the flights we sampled Oct 14–20; check Alaska for today's.
What plane is AS366?
Boeing 737-900 on 4 of the 7 AS366 flights from SEA we sampled Oct 14–20; the rest were a Boeing 737 MAX 9. Airlines swap aircraft, so the plane on a given day can differ.
Does AS366 fly every day?
Yes — AS366 flew Seattle to Washington every day of the week we sampled (Oct 14–20).
Is AS366 usually on time?
Of 7 AS366 departures from SEA we sampled Oct 14–20, 7 left within 15 minutes of the scheduled time. That counts only flights that departed — cancellations are not in our data — and one week is a small sample, so treat it as a hint, not a rating.
More Alaska flights from Seattle
Timetable from Alaska departures we observed; AS366 is a Alaska Airlines flight number, and Hop Nonstop is not affiliated with Alaska. Schedules change — confirm with the airline before you travel.