Best Time to Fly ORD to RDU: On-Time Stats by Hour & Airline
Chicago O'Hare International → Raleigh-Durham International
Data through July 2026 · Last updated October 18, 2026
3,656 flights were scheduled from Chicago (ORD) to Raleigh/Durham (RDU) in the last 12 months, and 73.6% of those that flew arrived on time, 4.0 points below the US average of 77.6%.
Among 6 airlines, SkyWest Airlines led with 80.8% on time and American Airlines was last with 59.6%.
Over 24 months, Tuesday was the most reliable day (80% on time) and July the worst month (68%).
The cancellation rate was 2.5% (US average 1.8%).
ORD 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 |
|---|---|---|---|---|
| SkyWest Airlines | 80.8% | 53 min | 2.3% | 133 |
| Envoy Air | 77.2% | 52 min | 1.9% | 520 |
| United Airlines | 76.7% | 75 min | 1.1% | 1,278 |
| Republic Airways | 75.0% | 69 min | 3.4% | 1,085 |
| Frontier Airlines | 65.1% | 146 min | 4.4% | 114 |
| American Airlines | 59.6% | 103 min | 4.0% | 524 |
| PSA Airlines | Limited data | 2 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly ORD to RDU
On-time arrival % by scheduled departure hour (local time), 6,888 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 12am–1am | Limited data | 2 | |
| 5am–6am | Limited data | 3 | |
| 6am–7am | 89.3% | 1.3% | 151 |
| 7am–8am | 85.0% | 0.6% | 477 |
| 8am–9am | 87.0% | 0.8% | 707 |
| 9am–10am | 84.6% | 0.4% | 515 |
| 10am–11am | 79.3% | 1.3% | 615 |
| 11am–12pm | 82.0% | 1.1% | 534 |
| 12pm–1pm | 70.9% | 2.2% | 137 |
| 1pm–2pm | 74.5% | 1.6% | 365 |
| 2pm–3pm | 76.7% | 1.1% | 915 |
| 3pm–4pm | 78.3% | 2.5% | 242 |
| 4pm–5pm | 63.9% | 0.6% | 181 |
| 5pm–6pm | 69.7% | 2.7% | 183 |
| 6pm–7pm | 66.4% | 1.8% | 1,039 |
| 7pm–8pm | 78.5% | 3.9% | 285 |
| 8pm–9pm | 57.0% | 5.0% | 478 |
| 9pm–10pm | 76.0% | 7.4% | 54 |
| 11pm–12am | Limited data | 5 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on ORD 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) | 65.9% | -12.4 pts | 5.8% | 137 |
| Christmas & New Year (Dec 20 - Jan 3) | 75.8% | -2.5 pts | 0.8% | 254 |
| Summer peak (Jun 15 - Aug 15) | 69.1% | -9.2 pts | 2.1% | 1,209 |
| All other days | 78.3% | — | 1.5% | 5,288 |
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).