Alaska Airlines SEA to SJC on-time performance
Alaska Airlines nonstop flights from Seattle to San Jose · Aug 2025 – Jul 2026
On-time arrivals
81%
arrived < 15 min late
Cancelled
1.1%
20 flights
Avg arrival delay
10 min
44 min when late
Rank on route
#4 of 5
route average 81% on time
Key facts
- Alaska Airlines flights on SEA to SJC arrived on time 81% of the time in Aug 2025 – Jul 2026.
- 1.1% were cancelled, and 4% arrived an hour or more late.
- That ranks #4 of 5 airlines on this route, which averaged 81% on time overall.
- The largest source of delay minutes was late-arriving aircraft (48%).
On-time trend by month
Why this airline's flights were late
- Late-arriving aircraft48%
- Airline (crew, maintenance, cleaning, fueling)38%
- Air traffic control & airport congestion12%
- Extreme weather1%
- Security0%
Other airlines on SEA to SJC
- SkyWest Airlines87% on time · 9 min avg delay
- Southwest Airlines72% on time · 13 min avg delay
- American Airlines100% on time · 5 min avg delay
- United Airlines100% on time · 0 min avg delay
Full SEA to SJC comparison →
Alaska Airlines on-time record across all routes →
1,881 Alaska Airlines flights tracked on this route; 20 cancelled, 1 diverted.
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. How we calculate this.