Southwest Airlines SEA to SMF on-time performance
Southwest Airlines nonstop flights from Seattle to Sacramento · Aug 2025 – Jul 2026
On-time arrivals
73%
arrived < 15 min late
Cancelled
0.4%
4 flights
Avg arrival delay
14 min
48 min when late
Rank on route
#3 of 3
route average 82% on time
Key facts
- Southwest Airlines flights on SEA to SMF arrived on time 73% of the time in Aug 2025 – Jul 2026.
- 0.4% were cancelled, and 6% arrived an hour or more late.
- That ranks #3 of 3 airlines on this route, which averaged 82% on time overall.
- The largest source of delay minutes was late-arriving aircraft (66%).
On-time trend by month
Why this airline's flights were late
- Late-arriving aircraft66%
- Airline (crew, maintenance, cleaning, fueling)27%
- Air traffic control & airport congestion6%
- Security0%
- Extreme weather0%
Other airlines on SEA to SMF
- SkyWest Airlines89% on time · 7 min avg delay
- Alaska Airlines80% on time · 10 min avg delay
Full SEA to SMF comparison →
Southwest Airlines on-time record across all routes →
1,140 Southwest Airlines flights tracked on this route; 4 cancelled, 3 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.