Best Time to Fly RDU to ORD: On-Time Stats by Hour & Airline
Raleigh-Durham International → Chicago O'Hare International
Data through July 2026 · Last updated October 18, 2026
3,654 flights were scheduled from Raleigh/Durham (RDU) to Chicago (ORD) in the last 12 months, and 74.6% of those that flew arrived on time, 3.0 points below the US average of 77.6%.
Among 6 airlines, American Airlines led with 81.4% on time and Frontier Airlines was last with 57.9%.
Over 24 months, Tuesday was the most reliable day (81% on time) and July the worst month (67%).
The cancellation rate was 2.9% (US average 1.8%).
RDU to ORD 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 |
|---|---|---|---|---|
| American Airlines | 81.4% | 160 min | 4.0% | 523 |
| SkyWest Airlines | 81.1% | 198 min | 3.8% | 133 |
| United Airlines | 75.7% | 96 min | 1.5% | 1,275 |
| Envoy Air | 72.4% | 87 min | 1.9% | 521 |
| Republic Airways | 72.0% | 78 min | 4.1% | 1,086 |
| Frontier Airlines | 57.9% | 148 min | 5.3% | 114 |
| PSA Airlines | Limited data | 2 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly RDU to ORD
On-time arrival % by scheduled departure hour (local time), 6,886 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 92.2% | 2.3% | 132 |
| 6am–7am | 90.5% | 1.1% | 966 |
| 7am–8am | 83.8% | 3.9% | 571 |
| 8am–9am | 87.4% | 1.8% | 227 |
| 9am–10am | 87.5% | 1.3% | 447 |
| 10am–11am | 89.1% | 1.6% | 670 |
| 11am–12pm | 86.9% | 0.6% | 162 |
| 12pm–1pm | 82.6% | 1.4% | 281 |
| 1pm–2pm | 80.7% | 1.9% | 784 |
| 2pm–3pm | 66.8% | 0.6% | 181 |
| 3pm–4pm | 72.9% | 3.3% | 429 |
| 4pm–5pm | 71.4% | 1.9% | 643 |
| 5pm–6pm | 51.3% | 1.4% | 728 |
| 6pm–7pm | 61.8% | 4.1% | 368 |
| 7pm–8pm | 60.6% | 4.2% | 217 |
| 8pm–9pm | Limited data | 5 | |
| 9pm–10pm | Limited data | 21 | |
| 10pm–11pm | 62.5% | 11.1% | 54 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on RDU to ORD
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) | 67.7% | -11.9 pts | 5.1% | 137 |
| Christmas & New Year (Dec 20 - Jan 3) | 83.0% | +3.4 pts | 0.8% | 255 |
| Summer peak (Jun 15 - Aug 15) | 68.3% | -11.3 pts | 3.5% | 1,209 |
| All other days | 79.6% | — | 1.8% | 5,285 |
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).