Southwest Airlines SEA to SJC on-time performance
Southwest Airlines nonstop flights from Seattle to San Jose · Aug 2025 – Jul 2026
On-time arrivals
72%
arrived < 15 min late
Cancelled
0.2%
2 flights
Avg arrival delay
13 min
44 min when late
Rank on route
#5 of 5
route average 81% on time
Key facts
- Southwest Airlines flights on SEA to SJC arrived on time 72% of the time in Aug 2025 – Jul 2026.
- 0.2% were cancelled, and 6% arrived an hour or more late.
- That ranks #5 of 5 airlines on this route, which averaged 81% on time overall.
- The largest source of delay minutes was late-arriving aircraft (61%).
On-time trend by month
Why this airline's flights were late
- Late-arriving aircraft61%
- Airline (crew, maintenance, cleaning, fueling)29%
- Air traffic control & airport congestion9%
- Security1%
- Extreme weather0%
Other airlines on SEA to SJC
- Alaska Airlines81% on time · 10 min avg delay
- SkyWest Airlines87% on time · 9 min avg delay
- American Airlines100% on time · 5 min avg delay
- United Airlines100% on time · 0 min avg delay
Full SEA to SJC comparison →
Southwest Airlines on-time record across all routes →
905 Southwest Airlines flights tracked on this route; 2 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.