No delays reported for AS 4 (SEA → DCA) as of 6:43 PM ET. It arrived on time 87.6% of the time in June-August 2026. When it was late, the average delay was 29 minutes. None were cancelled. Right now there are no reported delays at SEA, DCA.
Looks on time
Next leg SEA → DCA, scheduled 8:00 AM local time. No delays at SEA right now, and it usually runs on time.
Cancellation risk: Low 0% of its flights were cancelled in June-August 2026.
Estimate from the schedule, live position and airport conditions, if this flight operates today. Check Alaska Airlines for official times.
Before you fly
Some links are affiliate links.
Route and schedule
| Leg | Scheduled | On time |
|---|---|---|
| SEA → DCA Seattle, WA to Washington, DC | 8:00 AM → 4:16 PM | 88% |
Local times. Schedules change; check your booking.
How reliable is AS 4?
| Arrived on time (within 15 min) | 87.6% |
| Average delay when late | 29 min |
| Cancelled | 0% |
| Diverted | 2.2% |
| Flights tracked | 91 |
Best and worst days to fly AS 4
AS 4 was most reliable on Wednesdays (100% on time) and least reliable on Tuesdays (75%).
| Monday | |
| Tuesday | |
| Wednesday | |
| Thursday | |
| Friday | |
| Saturday | |
| Sunday |
Why it runs late
| Late-arriving plane | |
| Airline (crew, maintenance) | |
| Air traffic system | |
| Extreme weather |
Share of delay minutes by cause, as reported by Alaska Airlines to the Department of Transportation.
Other flights SEA → DCA
All flights on this route, ranked
Live status at its airports
We show airport-wide airport status, not this flight's gate or live position. For that, check the Alaska Airlines app.
Alaska Airlines delays and what you're owed · Airline phone numbers
About this data
On-time history: U.S. Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, June-August 2026. Live conditions: live airport status. "On time" means arriving within 15 minutes of schedule.
Common questions
Is AS 4 delayed today?
Right now there are no reported delays at SEA, DCA. Checked 6:43 PM ET. For this flight's gate and exact status, check the Alaska Airlines app.
Is AS 4 usually on time?
AS 4 arrived within 15 minutes of schedule 87.6% of the time in June-August 2026, with an average delay of 29 minutes when late.
How often is AS 4 cancelled?
0% of AS 4 flights were cancelled in June-August 2026.