Best Time to Fly DFW to IAH: On-Time Stats by Hour & Airline
Dallas/Fort Worth International → George Bush Intercontinental/Houston
Data through July 2026 · Last updated October 18, 2026
5,805 flights were scheduled from Dallas/Fort Worth (DFW) to Houston (IAH) in the last 12 months, and 69.3% of those that flew arrived on time, 8.3 points below the US average of 77.6%.
United Airlines was the most punctual of the 4 airlines on the route at 77.3%, while American Airlines trailed at 58.7%.
February has been the best month (82% on time) and Sunday the weakest day of the week (68%).
2.6% of flights were cancelled, versus 1.8% nationally.
DFW to IAH 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 |
|---|---|---|---|---|
| United Airlines | 77.3% | 82 min | 1.7% | 2,453 |
| Envoy Air | 77.0% | 56 min | 2.3% | 772 |
| SkyWest Airlines | 76.4% | 90 min | 5.3% | 76 |
| American Airlines | 58.7% | 82 min | 3.5% | 2,496 |
| PSA Airlines | Limited data | 8 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly DFW to IAH
On-time arrival % by scheduled departure hour (local time), 11,564 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 95.0% | 2.7% | 518 |
| 6am–7am | 84.8% | 5.7% | 35 |
| 7am–8am | 76.1% | 2.1% | 1,379 |
| 8am–9am | 76.0% | 2.8% | 653 |
| 9am–10am | 78.3% | 2.0% | 708 |
| 10am–11am | 76.2% | 2.4% | 715 |
| 11am–12pm | 70.9% | 2.2% | 182 |
| 12pm–1pm | 77.1% | 2.5% | 960 |
| 1pm–2pm | 76.4% | 3.5% | 169 |
| 2pm–3pm | 79.3% | 3.2% | 948 |
| 3pm–4pm | 70.2% | 3.4% | 731 |
| 4pm–5pm | 63.1% | 2.3% | 899 |
| 5pm–6pm | 59.8% | 3.0% | 1,018 |
| 6pm–7pm | 54.2% | 3.6% | 448 |
| 7pm–8pm | 69.1% | 3.9% | 821 |
| 8pm–9pm | 64.4% | 3.1% | 383 |
| 9pm–10pm | 52.3% | 3.8% | 529 |
| 10pm–11pm | 63.2% | 3.0% | 468 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on DFW to IAH
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) | 76.4% | +4.2 pts | 0.5% | 213 |
| Christmas & New Year (Dec 20 - Jan 3) | 75.2% | +3.0 pts | 2.0% | 442 |
| Summer peak (Jun 15 - Aug 15) | 65.0% | -7.2 pts | 2.6% | 1,853 |
| All other days | 72.2% | — | 3.0% | 9,056 |
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).