Alaska Airlines SJC to SEA on-time performance
Alaska Airlines nonstop flights from San Jose to Seattle · Aug 2025 – Jul 2026
On-time arrivals
81%
arrived < 15 min late
Cancelled
1.3%
24 flights
Avg arrival delay
10 min
50 min when late
Rank on route
#4 of 5
route average 83% on time
Key facts
- Alaska Airlines flights on SJC to SEA arrived on time 81% of the time in Aug 2025 – Jul 2026.
- 1.3% were cancelled, and 5% arrived an hour or more late.
- That ranks #4 of 5 airlines on this route, which averaged 83% on time overall.
- The largest source of delay minutes was late-arriving aircraft (39%).
On-time trend by month
Why this airline's flights were late
- Late-arriving aircraft39%
- Air traffic control & airport congestion33%
- Airline (crew, maintenance, cleaning, fueling)24%
- Extreme weather4%
- Security0%
Other airlines on SJC to SEA
- SkyWest Airlines89% on time · 8 min avg delay
- Southwest Airlines77% on time · 11 min avg delay
- American Airlines100% on time · 5 min avg delay
- United Airlines100% on time · 0 min avg delay
Full SJC to SEA comparison →
Alaska Airlines on-time record across all routes →
1,878 Alaska Airlines flights tracked on this route; 24 cancelled, 0 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.