United Airlines IAH to ORD on-time performance
United Airlines nonstop flights from Houston to Chicago · Aug 2025 – Jul 2026
On-time arrivals
79%
arrived < 15 min late
Cancelled
0.7%
27 flights
Avg arrival delay
16 min
70 min when late
Rank on route
#1 of 8
route average 75% on time
Key facts
- United Airlines flights on IAH to ORD arrived on time 79% 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 75% on time overall.
- The largest source of delay minutes was air traffic control & airport congestion (52%).
On-time trend by month
Why this airline's flights were late
- Air traffic control & airport congestion52%
- Late-arriving aircraft25%
- Airline (crew, maintenance, cleaning, fueling)20%
- Extreme weather3%
- Security0%
Other airlines on IAH to ORD
- American Airlines67% on time · 40 min avg delay
- Republic Airways73% on time · 22 min avg delay
- Envoy Air73% on time · 18 min avg delay
- Spirit Airlines63% on time · 27 min avg delay
- Frontier Airlines65% on time · 48 min avg delay
- PSA Airlines50% on time · 78 min avg delay
- SkyWest Airlines50% on time · 23 min avg delay
Full IAH to ORD comparison →
United Airlines on-time record across all routes →
4,048 United Airlines flights tracked on this route; 27 cancelled, 27 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.