Best Time to Fly ATL to HOU: On-Time Stats by Hour & Airline
Hartsfield-Jackson Atlanta International → William P Hobby
Data through July 2026 · Last updated October 18, 2026
2,879 flights were scheduled from Atlanta (ATL) to Houston (HOU) in the last 12 months, and 80.5% of those that flew arrived on time, 2.9 points above the US average of 77.6%.
Delta Air Lines was the most punctual of the 2 airlines on the route at 81.0%, while Southwest Airlines trailed at 80.0%.
September has been the best month (88% on time) and Sunday the weakest day of the week (77%).
1.3% of flights were cancelled, versus 1.8% nationally.
ATL to HOU on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| Delta Air Lines | 81.0% | 58 min | 1.9% | 1,397 |
| Southwest Airlines | 80.0% | 57 min | 0.7% | 1,482 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly ATL to HOU
On-time arrival % by scheduled departure hour (local time), 5,979 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | 94.7% | 1.3% | 553 |
| 7am–8am | 93.9% | 0.9% | 115 |
| 8am–9am | 89.2% | 1.4% | 814 |
| 9am–10am | 85.5% | 2.6% | 305 |
| 10am–11am | 85.5% | 0.0% | 69 |
| 11am–12pm | 86.2% | 0.7% | 549 |
| 12pm–1pm | 84.0% | 0.5% | 372 |
| 1pm–2pm | 83.1% | 0.5% | 214 |
| 2pm–3pm | 82.2% | 1.0% | 504 |
| 3pm–4pm | 76.3% | 1.1% | 282 |
| 4pm–5pm | 74.9% | 1.5% | 529 |
| 5pm–6pm | 75.0% | 0.0% | 152 |
| 6pm–7pm | 66.2% | 1.4% | 291 |
| 7pm–8pm | 63.4% | 0.0% | 222 |
| 8pm–9pm | 68.2% | 0.4% | 237 |
| 9pm–10pm | 77.3% | 1.6% | 638 |
| 10pm–11pm | 62.4% | 0.0% | 133 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on ATL to HOU
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 76.6% | -6.5 pts | 0.0% | 124 |
| Christmas & New Year (Dec 20 - Jan 3) | 77.6% | -5.6 pts | 0.4% | 252 |
| Summer peak (Jun 15 - Aug 15) | 73.8% | -9.4 pts | 0.9% | 1,048 |
| All other days | 83.2% | — | 1.2% | 4,555 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).