United Airlines ATL to IAH on-time performance
United Airlines nonstop flights from Atlanta to Houston · Aug 2025 – Jul 2026
On-time arrivals
85%
arrived < 15 min late
Cancelled
0.8%
10 flights
Avg arrival delay
12 min
71 min when late
Rank on route
#1 of 5
route average 76% on time
Key facts
- United Airlines flights on ATL to IAH arrived on time 85% of the time in Aug 2025 – Jul 2026.
- 0.8% were cancelled, and 6% arrived an hour or more late.
- That ranks #1 of 5 airlines on this route, which averaged 76% on time overall.
- The largest source of delay minutes was late-arriving aircraft (36%).
On-time trend by month
Why this airline's flights were late
- Late-arriving aircraft36%
- Air traffic control & airport congestion31%
- Airline (crew, maintenance, cleaning, fueling)30%
- Extreme weather3%
- Security0%
Other airlines on ATL to IAH
- Delta Air Lines76% on time · 15 min avg delay
- Frontier Airlines70% on time · 25 min avg delay
- Spirit Airlines66% on time · 28 min avg delay
- SkyWest Airlines75% on time · 12 min avg delay
Full ATL to IAH comparison →
United Airlines on-time record across all routes →
1,261 United Airlines flights tracked on this route; 10 cancelled, 1 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.