Flight profile · Alaska Airlines
AS1311
San Jose (SJC) to Seattle (SEA) · scheduled 10:03 AM – 12:29 PM
How AS1311 performs
334 operations, 2025-04-22 to 2026-06-30.
AS1311 arrived on time 90.8% of the time, against 84.1% for all SJC → SEA flights — this specific departure is 6.7 percentage points better than the route as a whole. Against Alaska Airlines’s own flights on this route it is 6.8 points better.
Source: US DOT Bureau of Transportation Statistics · 334 operations between 2025-04-22 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| AS1311 | 90.8% | 2.69% | -13 min | 0.6% | 334 |
| Alaska Airlines on SJC → SEA | 84.0% | 1.76% | -8 min | 3.5% | 5,674 |
| All SJC → SEA flights | 84.1% | 0.81% | -8 min | 3.7% | 13,461 |
Source: FlyerIntel analysis of US DOT BTS data · 2025-04-22 to 2026-06-30
Other routes AS1311 has flown
A flight number is a slot in a schedule, and carriers reassign it. These are the other city pairs this number served in the analysis period.
Because the same number has served different journeys, the statistics above describe only the route AS1311 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 334 records of AS1311 operating SJC → SEA, published by the US DOT Bureau of Transportation Statistics. A flight counts as delayed when it arrives 15 or more minutes after schedule. Cancelled and diverted flights are excluded from the on-time rate and reported separately. Flight numbers are resolved as carrier plus number plus route, because the same number serves different routes over time.