United Airlines LAS to ORD on-time performance
United Airlines nonstop flights from Las Vegas to Chicago · Aug 2025 – Jul 2026
On-time arrivals
80%
arrived < 15 min late
Cancelled
0.5%
11 flights
Avg arrival delay
16 min
76 min when late
Rank on route
#2 of 5
route average 77% on time
Key facts
- United Airlines flights on LAS to ORD 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 77% on time overall.
- The largest source of delay minutes was air traffic control & airport congestion (48%).
On-time trend by month
Why this airline's flights were late
- Air traffic control & airport congestion48%
- Late-arriving aircraft27%
- Airline (crew, maintenance, cleaning, fueling)23%
- Extreme weather1%
- Security0%
Other airlines on LAS to ORD
- American Airlines76% on time · 27 min avg delay
- Southwest Airlines68% on time · 20 min avg delay
- Frontier Airlines67% on time · 32 min avg delay
- Spirit Airlines85% on time · 10 min avg delay
Full LAS to ORD comparison →
United Airlines on-time record across all routes →
2,337 United Airlines flights tracked on this route; 11 cancelled, 16 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.