About 1 in 8 AS 1311 flights from San Jose arrived 15+ minutes late, diverted or cancelled over the past year (12%); 2.0% were cancelled. The typical flight landed 13 minutes early.
AS 1311: SJC → SEA
Scheduled to leave San Jose at 10:19 a.m. local time. Over the past year it arrived on time 88% of the time (305 flights), better than other AS flights on the route at that hour (84%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 49 | 94% |
| Tuesday | 43 | 88% |
| Wednesday | 44 | 89% |
| Thursday | 47 | 83% |
| Friday | 46 | 87% |
| Saturday | 34 | 91% |
| Sunday | 42 | 83% |
Why it was late
All flights SJC → SEA · Connecting off AS 1311? Check the risk
Questions
How often is AS 1311 from SJC to SEA late?
Alaska Airlines 1311 from San Jose, CA to Seattle, WA arrived 15 or more minutes late, was diverted or was cancelled on 12% of 305 scheduled flights between September 2025 and August 2026. 2.0% were cancelled.
Flight numbers change. Figures cover flights with this airline, number and route only. "Likely range" is the 95% interval for the true on-time rate given the number of flights. This is history, not live status: check Alaska Airlines for today's flight. Method.