Likely delayed: there are delays at AS 604's airports as of 6:43 PM ET. It arrived on time 78% of the time in June-August 2026. When it was late, the average delay was 30 minutes. None were cancelled. AUS has major delays (runway construction, max 3 hours and 3 minutes), so this flight is likely to be delayed.
High cancellation risk
Leg 1 of 3 (SEA → AUS): Should be in the air from SEA, scheduled to land at AUS at 6:04 PM local time. This flight number flew about 5 days a week in June-August 2026, so it may not operate today. Line up a backup option.
0% of its flights were cancelled in June-August 2026; AUS has major delays; rough weather at AUS.
Estimate from the schedule, live position and airport conditions, if this flight operates today. Check Alaska Airlines for official times.
Book a backup seat SEA → SANThis flight is cancelled often; a refundable backup costs little
What to do now
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Route and schedule
| Leg | Scheduled | On time |
|---|---|---|
| SEA → AUS Seattle, WA to Austin, TX | 11:46 AM → 6:04 PM | 75% |
| SEA → PHX Seattle, WA to Phoenix, AZ | 7:06 PM → 10:02 PM | 89% |
| SEA → SAN Seattle, WA to San Diego, CA | 8:49 PM → 11:44 PM | 85% |
Local times. Schedules change; check your booking.
How reliable is AS 604?
| Arrived on time (within 15 min) | 78% |
| Average delay when late | 30 min |
| Cancelled | 0% |
| Diverted | 0% |
| Flights tracked | 91 |
Best and worst days to fly AS 604
AS 604 was most reliable on Sundays (100% on time) and least reliable on Mondays (57%).
| 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 → AUS
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 604 delayed today?
AUS has major delays (runway construction, max 3 hours and 3 minutes), so this flight is likely to be delayed. Checked 6:43 PM ET. For this flight's gate and exact status, check the Alaska Airlines app.
Is AS 604 usually on time?
AS 604 arrived within 15 minutes of schedule 78% of the time in June-August 2026, with an average delay of 30 minutes when late.
How often is AS 604 cancelled?
0% of AS 604 flights were cancelled in June-August 2026.