Southwest Airlines SEA to SAN on-time performance
Southwest Airlines nonstop flights from Seattle to San Diego · Aug 2025 – Jul 2026
On-time arrivals
52%
arrived < 15 min late
Cancelled
0.0%
0 flights
Avg arrival delay
23 min
42 min when late
Rank on route
#4 of 4
route average 76% on time
Key facts
- Southwest Airlines flights on SEA to SAN arrived on time 52% of the time in Aug 2025 – Jul 2026.
- 0% were cancelled, and 6% arrived an hour or more late.
- That ranks #4 of 4 airlines on this route, which averaged 76% on time overall.
- The largest source of delay minutes was late-arriving aircraft (45%).
On-time trend by month
Why this airline's flights were late
- Late-arriving aircraft45%
- Airline (crew, maintenance, cleaning, fueling)35%
- Air traffic control & airport congestion20%
- Extreme weather0%
- Security0%
Other airlines on SEA to SAN
- Alaska Airlines74% on time · 13 min avg delay
- Delta Air Lines82% on time · 11 min avg delay
- SkyWest Airlines100% on time · 0 min avg delay
Full SEA to SAN comparison →
Southwest Airlines on-time record across all routes →
149 Southwest Airlines flights tracked on this route; 0 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.