United Airlines LAX to SEA on-time performance
United Airlines nonstop flights from Los Angeles to Seattle · Aug 2025 – Jul 2026
On-time arrivals
87%
arrived < 15 min late
Cancelled
0.3%
1 flights
Avg arrival delay
6 min
45 min when late
Rank on route
#1 of 6
route average 85% on time
Key facts
- United Airlines flights on LAX to SEA arrived on time 87% of the time in Aug 2025 – Jul 2026.
- 0.3% were cancelled, and 3% arrived an hour or more late.
- That ranks #1 of 6 airlines on this route, which averaged 85% on time overall.
- The largest source of delay minutes was late-arriving aircraft (54%).
On-time trend by month
Why this airline's flights were late
- Late-arriving aircraft54%
- Airline (crew, maintenance, cleaning, fueling)27%
- Air traffic control & airport congestion19%
- Extreme weather0%
- Security0%
Other airlines on LAX to SEA
- Alaska Airlines85% on time · 8 min avg delay
- Delta Air Lines86% on time · 11 min avg delay
- SkyWest Airlines84% on time · 14 min avg delay
- Frontier Airlines82% on time · 15 min avg delay
- American Airlines73% on time · 40 min avg delay
Full LAX to SEA comparison →
United Airlines on-time record across all routes →
394 United Airlines flights tracked on this route; 1 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.