Southwest Airlines SMF to SEA on-time performance
Southwest Airlines nonstop flights from Sacramento to Seattle · Aug 2025 – Jul 2026
On-time arrivals
78%
arrived < 15 min late
Cancelled
0.2%
2 flights
Avg arrival delay
11 min
42 min when late
Rank on route
#3 of 3
route average 83% on time
Key facts
- Southwest Airlines flights on SMF to SEA arrived on time 78% of the time in Aug 2025 – Jul 2026.
- 0.2% were cancelled, and 5% arrived an hour or more late.
- That ranks #3 of 3 airlines on this route, which averaged 83% on time overall.
- The largest source of delay minutes was late-arriving aircraft (48%).
On-time trend by month
Why this airline's flights were late
- Late-arriving aircraft48%
- Airline (crew, maintenance, cleaning, fueling)31%
- Air traffic control & airport congestion20%
- Extreme weather0%
- Security0%
Other airlines on SMF to SEA
- SkyWest Airlines87% on time · 8 min avg delay
- Alaska Airlines80% on time · 10 min avg delay
Full SMF to SEA comparison →
Southwest Airlines on-time record across all routes →
1,139 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.