United Airlines ORD to LAS on-time performance
United Airlines nonstop flights from Chicago to Las Vegas · Aug 2025 – Jul 2026
On-time arrivals
80%
arrived < 15 min late
Cancelled
0.5%
11 flights
Avg arrival delay
14 min
68 min when late
Rank on route
#2 of 5
route average 74% on time
Key facts
- United Airlines flights on ORD to LAS arrived on time 80% of the time in Aug 2025 – Jul 2026.
- 0.5% were cancelled, and 7% arrived an hour or more late.
- That ranks #2 of 5 airlines on this route, which averaged 74% 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%
- Air traffic control & airport congestion27%
- Airline (crew, maintenance, cleaning, fueling)21%
- Extreme weather7%
- Security0%
Other airlines on ORD to LAS
- American Airlines67% on time · 25 min avg delay
- Southwest Airlines73% on time · 20 min avg delay
- Frontier Airlines59% on time · 64 min avg delay
- Spirit Airlines83% on time · 13 min avg delay
Full ORD to LAS comparison →
United Airlines on-time record across all routes →
2,335 United Airlines flights tracked on this route; 11 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.