Alaska Airlines SEA to SAN on-time performance
Alaska Airlines nonstop flights from Seattle to San Diego · Aug 2025 – Jul 2026
On-time arrivals
74%
arrived < 15 min late
Cancelled
1.1%
29 flights
Avg arrival delay
13 min
44 min when late
Rank on route
#3 of 4
route average 76% on time
Key facts
- Alaska Airlines flights on SEA to SAN arrived on time 74% of the time in Aug 2025 – Jul 2026.
- 1.1% were cancelled, and 5% arrived an hour or more late.
- That ranks #3 of 4 airlines on this route, which averaged 76% on time overall.
- The largest source of delay minutes was air traffic control & airport congestion (36%).
On-time trend by month
Why this airline's flights were late
- Air traffic control & airport congestion36%
- Airline (crew, maintenance, cleaning, fueling)31%
- Late-arriving aircraft31%
- Extreme weather2%
- Security0%
Other airlines on SEA to SAN
- Delta Air Lines82% on time · 11 min avg delay
- Southwest Airlines52% on time · 23 min avg delay
- SkyWest Airlines100% on time · 0 min avg delay
Full SEA to SAN comparison →
Alaska Airlines on-time record across all routes →
2,741 Alaska Airlines flights tracked on this route; 29 cancelled, 8 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.