Best Time to Fly ROC to IAD: On-Time Stats by Hour & Airline
Frederick Douglass Grtr Rochester International → Washington Dulles International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 82.9% of Rochester (ROC) to Washington (IAD) flights arrived on time (155 scheduled flights). That is 5.3 points above the national average of 77.6%.
Republic Airways was the only reporting airline with regular flights on this route.
August has been the best month (97% on time) and Thursday the weakest day of the week (68%).
1.9% of flights were cancelled, versus 1.8% nationally.
ROC 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 | 82.6% | 75 min | 2.0% | 147 |
| United Airlines | Limited data | 8 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly ROC to IAD
On-time arrival % by scheduled departure hour (local time), 245 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | 80.4% | 2.6% | 230 |
| 10am–11am | Limited data | 7 | |
| 7pm–8pm | Limited data | 8 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on ROC 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 | 7 | ||
| Christmas & New Year (Dec 20 - Jan 3) | Limited data | 14 | ||
| Summer peak (Jun 15 - Aug 15) | 88.5% | +8.3 pts | 3.7% | 54 |
| All other days | 80.1% | — | 2.4% | 170 |
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).