Alaska Airlines SEA to STS on-time performance
Alaska Airlines nonstop flights from Seattle to Santa Rosa · Aug 2025 – Jul 2026
On-time arrivals
86%
arrived < 15 min late
Cancelled
2.5%
9 flights
Avg arrival delay
8 min
49 min when late
Rank on route
#1 of 2
route average 84% on time
Key facts
- Alaska Airlines flights on SEA to STS arrived on time 86% of the time in Aug 2025 – Jul 2026.
- 2.5% were cancelled, and 3% arrived an hour or more late.
- That ranks #1 of 2 airlines on this route, which averaged 84% 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%
- Airline (crew, maintenance, cleaning, fueling)38%
- Air traffic control & airport congestion19%
- Extreme weather4%
- Security0%
Other airlines on SEA to STS
- SkyWest Airlines74% on time · 14 min avg delay
Full SEA to STS comparison →
Alaska Airlines on-time record across all routes →
357 Alaska Airlines flights tracked on this route; 9 cancelled, 3 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.