United Airlines STL to IAH on-time performance
United Airlines nonstop flights from St. Louis to Houston · Aug 2025 – Jul 2026
On-time arrivals
84%
arrived < 15 min late
Cancelled
1.4%
5 flights
Avg arrival delay
10 min
56 min when late
Rank on route
#1 of 2
route average 81% on time
Key facts
- United Airlines flights on STL to IAH arrived on time 84% of the time in Aug 2025 – Jul 2026.
- 1.4% were cancelled, and 4% arrived an hour or more late.
- That ranks #1 of 2 airlines on this route, which averaged 81% on time overall.
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (60%).
On-time trend by month
Why this airline's flights were late
- Airline (crew, maintenance, cleaning, fueling)60%
- Air traffic control & airport congestion23%
- Late-arriving aircraft13%
- Extreme weather4%
- Security0%
Other airlines on STL to IAH
- SkyWest Airlines64% on time · 31 min avg delay
Full STL to IAH comparison →
United Airlines on-time record across all routes →
356 United Airlines flights tracked on this route; 5 cancelled, 0 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.