Southwest Airlines SAN to SEA on-time performance
Southwest Airlines nonstop flights from San Diego to Seattle · Aug 2025 – Jul 2026
On-time arrivals
59%
arrived < 15 min late
Cancelled
0.0%
0 flights
Avg arrival delay
22 min
49 min when late
Rank on route
#3 of 4
route average 81% on time
Key facts
- Southwest Airlines flights on SAN to SEA arrived on time 59% of the time in Aug 2025 – Jul 2026.
- 0% were cancelled, and 9% arrived an hour or more late.
- That ranks #3 of 4 airlines on this route, which averaged 81% on time overall.
- The largest source of delay minutes was late-arriving aircraft (59%).
On-time trend by month
Why this airline's flights were late
- Late-arriving aircraft59%
- Airline (crew, maintenance, cleaning, fueling)24%
- Air traffic control & airport congestion18%
- Extreme weather0%
- Security0%
Other airlines on SAN to SEA
- Alaska Airlines78% on time · 15 min avg delay
- Delta Air Lines87% on time · 10 min avg delay
- SkyWest Airlines0% on time · 28 min avg delay
Full SAN to SEA comparison →
Southwest Airlines on-time record across all routes →
149 Southwest Airlines flights tracked on this route; 0 cancelled, 1 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.