Best Time to Fly IAH to RDU: On-Time Stats by Hour & Airline
George Bush Intercontinental/Houston → Raleigh-Durham International
Data through July 2026 · Last updated October 18, 2026
924 flights were scheduled from Houston (IAH) to Raleigh/Durham (RDU) in the last 12 months, and 82.8% of those that flew arrived on time, 5.1 points above the US average of 77.6%.
United Airlines was the most punctual of the 2 airlines on the route at 84.5%, while Frontier Airlines trailed at 77.7%.
January has been the best month (89% on time) and Monday the weakest day of the week (75%).
1.2% of flights were cancelled, versus 1.8% nationally.
IAH to RDU 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 | 84.5% | 65 min | 0.9% | 696 |
| Frontier Airlines | 77.7% | 85 min | 2.2% | 227 |
| SkyWest Airlines | Limited data | 1 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly IAH to RDU
On-time arrival % by scheduled departure hour (local time), 1,747 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 7am–8am | Limited data | 5 | |
| 8am–9am | 84.3% | 1.4% | 71 |
| 9am–10am | 78.8% | 0.9% | 107 |
| 10am–11am | Limited data | 3 | |
| 11am–12pm | 80.0% | 0.0% | 65 |
| 12pm–1pm | 88.5% | 1.0% | 589 |
| 1pm–2pm | Limited data | 8 | |
| 2pm–3pm | 69.0% | 1.7% | 59 |
| 3pm–4pm | Limited data | 28 | |
| 4pm–5pm | 83.7% | 0.0% | 43 |
| 5pm–6pm | 57.1% | 3.9% | 51 |
| 6pm–7pm | 75.0% | 0.6% | 705 |
| 7pm–8pm | Limited data | 7 | |
| 8pm–9pm | Limited data | 6 | |
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 RDU
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) | 94.3% | +11.6 pts | 2.8% | 36 |
| Christmas & New Year (Dec 20 - Jan 3) | 69.4% | -13.3 pts | 0.0% | 72 |
| Summer peak (Jun 15 - Aug 15) | 68.8% | -13.9 pts | 1.3% | 298 |
| All other days | 82.7% | — | 1.1% | 1,341 |
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).