Alaska Airlines STS to SEA on-time performance
Alaska Airlines nonstop flights from Santa Rosa to Seattle · Aug 2025 – Jul 2026
On-time arrivals
78%
arrived < 15 min late
Cancelled
1.1%
4 flights
Avg arrival delay
12 min
50 min when late
Rank on route
#1 of 2
route average 77% on time
Key facts
- Alaska Airlines flights on STS to SEA arrived on time 78% of the time in Aug 2025 – Jul 2026.
- 1.1% were cancelled, and 5% arrived an hour or more late.
- That ranks #1 of 2 airlines on this route, which averaged 77% on time overall.
- The largest source of delay minutes was late-arriving aircraft (54%).
On-time trend by month
Why this airline's flights were late
- Late-arriving aircraft54%
- Air traffic control & airport congestion31%
- Airline (crew, maintenance, cleaning, fueling)15%
- Security0%
- Extreme weather0%
Other airlines on STS to SEA
- SkyWest Airlines70% on time · 15 min avg delay
Full STS to SEA comparison →
Alaska Airlines on-time record across all routes →
357 Alaska Airlines flights tracked on this route; 4 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.