United Airlines ORD to LAX on-time performance
United Airlines nonstop flights from Chicago to Los Angeles · Aug 2025 – Jul 2026
On-time arrivals
77%
arrived < 15 min late
Cancelled
0.6%
22 flights
Avg arrival delay
17 min
70 min when late
Rank on route
#1 of 5
route average 73% on time
Key facts
- United Airlines flights on ORD to LAX arrived on time 77% of the time in Aug 2025 – Jul 2026.
- 0.6% were cancelled, and 8% arrived an hour or more late.
- That ranks #1 of 5 airlines on this route, which averaged 73% on time overall.
- The largest source of delay minutes was late-arriving aircraft (40%).
On-time trend by month
Why this airline's flights were late
- Late-arriving aircraft40%
- Airline (crew, maintenance, cleaning, fueling)33%
- Air traffic control & airport congestion16%
- Extreme weather11%
- Security0%
Other airlines on ORD to LAX
- American Airlines69% on time · 26 min avg delay
- Frontier Airlines64% on time · 28 min avg delay
- Spirit Airlines73% on time · 24 min avg delay
- Delta Air Lines75% on time · 17 min avg delay
Full ORD to LAX comparison →
United Airlines on-time record across all routes →
3,387 United Airlines flights tracked on this route; 22 cancelled, 3 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.