Southwest Airlines SEA to LAS on-time performance
Southwest Airlines nonstop flights from Seattle to Las Vegas · Aug 2025 – Jul 2026
On-time arrivals
70%
arrived < 15 min late
Cancelled
0.5%
5 flights
Avg arrival delay
16 min
48 min when late
Rank on route
#4 of 6
route average 78% on time
Key facts
- Southwest Airlines flights on SEA to LAS arrived on time 70% of the time in Aug 2025 – Jul 2026.
- 0.5% were cancelled, and 6% arrived an hour or more late.
- That ranks #4 of 6 airlines on this route, which averaged 78% on time overall.
- The largest source of delay minutes was late-arriving aircraft (45%).
On-time trend by month
Why this airline's flights were late
- Late-arriving aircraft45%
- Airline (crew, maintenance, cleaning, fueling)33%
- Air traffic control & airport congestion18%
- Security4%
- Extreme weather0%
Other airlines on SEA to LAS
- Alaska Airlines79% on time · 11 min avg delay
- Delta Air Lines83% on time · 10 min avg delay
- Frontier Airlines68% on time · 41 min avg delay
- Spirit Airlines67% on time · 20 min avg delay
- SkyWest Airlines100% on time · 0 min avg delay
Full SEA to LAS comparison →
Southwest Airlines on-time record across all routes →
976 Southwest Airlines flights tracked on this route; 5 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.