Southwest Airlines SFO to SEA on-time performance
Southwest Airlines nonstop flights from San Francisco to Seattle · Aug 2025 – Jul 2026
On-time arrivals
100%
arrived < 15 min late
Cancelled
0.0%
0 flights
Avg arrival delay
3 min
– when late
Rank on route
#1 of 5
route average 73% on time
Key facts
- Southwest Airlines flights on SFO to SEA arrived on time 100% of the time in Aug 2025 – Jul 2026.
- 0% were cancelled, and 0% arrived an hour or more late.
- That ranks #1 of 5 airlines on this route, which averaged 73% on time overall.
On-time trend by month
Monthly trend appears once two or more months of data are available.
Why this airline's flights were late
No delay causes recorded in this period.
Other airlines on SFO to SEA
- Alaska Airlines70% on time · 18 min avg delay
- United Airlines75% on time · 15 min avg delay
- SkyWest Airlines70% on time · 16 min avg delay
- Delta Air Lines81% on time · 15 min avg delay
Full SFO to SEA comparison →
Southwest Airlines on-time record across all routes →
3 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.