United Airlines SEA to LAX on-time performance
United Airlines nonstop flights from Seattle to Los Angeles · Aug 2025 – Jul 2026
On-time arrivals
90%
arrived < 15 min late
Cancelled
0.0%
0 flights
Avg arrival delay
9 min
81 min when late
Rank on route
#1 of 6
route average 83% on time
Key facts
- United Airlines flights on SEA to LAX arrived on time 90% of the time in Aug 2025 – Jul 2026.
- 0% were cancelled, and 4% arrived an hour or more late.
- That ranks #1 of 6 airlines on this route, which averaged 83% on time overall.
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (57%).
On-time trend by month
Why this airline's flights were late
- Airline (crew, maintenance, cleaning, fueling)57%
- Late-arriving aircraft31%
- Air traffic control & airport congestion12%
- Extreme weather0%
- Security0%
Other airlines on SEA to LAX
- Alaska Airlines81% on time · 9 min avg delay
- Delta Air Lines83% on time · 11 min avg delay
- SkyWest Airlines85% on time · 19 min avg delay
- Frontier Airlines80% on time · 13 min avg delay
- American Airlines87% on time · 18 min avg delay
Full SEA to LAX comparison →
United Airlines on-time record across all routes →
392 United 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.