Best Time to Fly IAH to DFW: On-Time Stats by Hour & Airline
George Bush Intercontinental/Houston → Dallas/Fort Worth International
Data through July 2026 · Last updated October 18, 2026
5,804 flights were scheduled from Houston (IAH) to Dallas/Fort Worth (DFW) in the last 12 months, and 75.3% of those that flew arrived on time, 2.3 points below the US average of 77.6%.
Among 4 airlines, Envoy Air led with 77.9% on time and American Airlines was last with 73.8%.
Over 24 months, Tuesday was the most reliable day (78% on time) and June the worst month (63%).
The cancellation rate was 2.5% (US average 1.8%).
IAH to DFW 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 |
|---|---|---|---|---|
| Envoy Air | 77.9% | 103 min | 2.6% | 772 |
| SkyWest Airlines | 76.1% | 69 min | 6.6% | 76 |
| United Airlines | 76.1% | 73 min | 1.5% | 2,454 |
| American Airlines | 73.8% | 120 min | 3.4% | 2,495 |
| PSA Airlines | Limited data | 7 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly IAH to DFW
On-time arrival % by scheduled departure hour (local time), 11,573 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 89.8% | 2.8% | 716 |
| 6am–7am | 87.6% | 3.7% | 755 |
| 7am–8am | 78.5% | 1.8% | 1,232 |
| 8am–9am | 79.8% | 3.5% | 261 |
| 9am–10am | 80.6% | 2.9% | 955 |
| 10am–11am | 80.1% | 2.8% | 716 |
| 11am–12pm | 80.1% | 3.5% | 287 |
| 12pm–1pm | 77.2% | 2.4% | 850 |
| 1pm–2pm | 65.6% | 0.0% | 64 |
| 2pm–3pm | 73.5% | 3.0% | 1,337 |
| 3pm–4pm | 86.0% | 0.0% | 93 |
| 4pm–5pm | 71.1% | 3.0% | 1,296 |
| 5pm–6pm | 56.7% | 4.7% | 172 |
| 6pm–7pm | 62.9% | 2.9% | 1,248 |
| 7pm–8pm | 55.1% | 3.6% | 448 |
| 8pm–9pm | 71.0% | 1.3% | 672 |
| 9pm–10pm | 74.8% | 2.2% | 324 |
| 10pm–11pm | 80.6% | 1.5% | 131 |
| 11pm–12am | Limited data | 16 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on IAH to DFW
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) | 75.5% | -0.9 pts | 0.5% | 213 |
| Christmas & New Year (Dec 20 - Jan 3) | 76.6% | +0.2 pts | 2.5% | 442 |
| Summer peak (Jun 15 - Aug 15) | 69.1% | -7.3 pts | 2.7% | 1,852 |
| All other days | 76.3% | — | 2.8% | 9,066 |
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).