United Airlines ORD to DEN on-time performance
United Airlines nonstop flights from Chicago to Denver · Aug 2025 – Jul 2026
On-time arrivals
79%
arrived < 15 min late
Cancelled
0.9%
36 flights
Avg arrival delay
16 min
72 min when late
Rank on route
#1 of 5
route average 75% on time
Key facts
- United Airlines flights on ORD to DEN arrived on time 79% of the time in Aug 2025 – Jul 2026.
- 0.9% were cancelled, and 8% arrived an hour or more late.
- That ranks #1 of 5 airlines on this route, which averaged 75% on time overall.
- The largest source of delay minutes was late-arriving aircraft (43%).
On-time trend by month
Why this airline's flights were late
- Late-arriving aircraft43%
- Air traffic control & airport congestion28%
- Airline (crew, maintenance, cleaning, fueling)24%
- Extreme weather6%
- Security0%
Other airlines on ORD to DEN
- American Airlines66% on time · 27 min avg delay
- Southwest Airlines74% on time · 18 min avg delay
- Frontier Airlines70% on time · 37 min avg delay
- Envoy Air76% on time · 13 min avg delay
Full ORD to DEN comparison →
United Airlines on-time record across all routes →
3,816 United Airlines flights tracked on this route; 36 cancelled, 9 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.