Best Time to Fly CVG to IAD: On-Time Stats by Hour & Airline
Cincinnati/Northern Kentucky International → Washington Dulles International
Data through July 2026 · Last updated October 18, 2026
585 flights were scheduled from Cincinnati (CVG) to Washington (IAD) in the last 12 months, and 87.3% of those that flew arrived on time, 9.7 points above the US average of 77.6%.
Republic Airways was the only reporting airline with regular flights on this route.
May has been the best month (95% on time) and Sunday the weakest day of the week (83%).
1.7% of flights were cancelled, versus 1.8% nationally.
CVG to IAD 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 |
|---|---|---|---|---|
| Republic Airways | 87.1% | 80 min | 1.8% | 567 |
| United Airlines | Limited data | 18 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly CVG to IAD
On-time arrival % by scheduled departure hour (local time), 984 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | 93.0% | 1.7% | 174 |
| 10am–11am | 90.4% | 0.7% | 558 |
| 1pm–2pm | Limited data | 4 | |
| 2pm–3pm | 71.0% | 1.4% | 70 |
| 3pm–4pm | Limited data | 9 | |
| 7pm–8pm | 84.0% | 4.1% | 169 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on CVG to IAD
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) | Limited data | 29 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 86.7% | -2.3 pts | 0.0% | 30 |
| Summer peak (Jun 15 - Aug 15) | 86.2% | -2.7 pts | 3.9% | 204 |
| All other days | 88.9% | — | 1.0% | 721 |
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).