United Airlines ORD to IAH on-time performance
United Airlines nonstop flights from Chicago to Houston · Aug 2025 – Jul 2026
On-time arrivals
80%
arrived < 15 min late
Cancelled
0.7%
29 flights
Avg arrival delay
14 min
68 min when late
Rank on route
#1 of 8
route average 76% on time
Key facts
- United Airlines flights on ORD to IAH arrived on time 80% of the time in Aug 2025 – Jul 2026.
- 0.7% were cancelled, and 7% arrived an hour or more late.
- That ranks #1 of 8 airlines on this route, which averaged 76% on time overall.
- The largest source of delay minutes was late-arriving aircraft (44%).
On-time trend by month
Why this airline's flights were late
- Late-arriving aircraft44%
- Air traffic control & airport congestion26%
- Airline (crew, maintenance, cleaning, fueling)23%
- Extreme weather7%
- Security0%
Other airlines on ORD to IAH
- American Airlines59% on time · 34 min avg delay
- Republic Airways77% on time · 17 min avg delay
- Envoy Air75% on time · 17 min avg delay
- Spirit Airlines66% on time · 33 min avg delay
- Frontier Airlines78% on time · 24 min avg delay
- PSA Airlines50% on time · 37 min avg delay
- SkyWest Airlines0% on time · 32 min avg delay
Full ORD to IAH comparison →
United Airlines on-time record across all routes →
4,040 United Airlines flights tracked on this route; 29 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.