Delta Air Lines ATL to IAH on-time performance
Delta Air Lines nonstop flights from Atlanta to Houston · Aug 2025 – Jul 2026
On-time arrivals
76%
arrived < 15 min late
Cancelled
1.9%
49 flights
Avg arrival delay
15 min
56 min when late
Rank on route
#2 of 5
route average 76% on time
Key facts
- Delta Air Lines flights on ATL to IAH arrived on time 76% of the time in Aug 2025 – Jul 2026.
- 1.9% were cancelled, and 8% arrived an hour or more late.
- That ranks #2 of 5 airlines on this route, which averaged 76% on time overall.
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (45%).
On-time trend by month
Why this airline's flights were late
- Airline (crew, maintenance, cleaning, fueling)45%
- Air traffic control & airport congestion27%
- Late-arriving aircraft24%
- Extreme weather4%
- Security0%
Other airlines on ATL to IAH
- United Airlines85% on time · 12 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 →
Delta Air Lines on-time record across all routes →
2,521 Delta Air Lines flights tracked on this route; 49 cancelled, 5 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.