Washington (IAD) to Cincinnati (CVG): On-Time Performance
Data through July 2026
When you fly IAD to CVG matters as much as anything else about the booking: the route swung from 100% on-time in October 2024 to just 67% in June 2026. Across the full period the route averages 85% on-time against a national 78%. Morning departures also hold up better than evening ones (92% vs 79%), which matters most in the rough months.
- On-time
- 85%
- arrived <15 min late
- Avg delay
- 12 min
- completed flights
- Cancelled
- 2.1%
- Flights/day
- 1.5
- last 12 months
- Duration
- 1h 41m
- scheduled
- Distance
- 388 mi
Monthly on-time trend
Best time to fly from IAD to CVG
Aim for departures around 8 a.m. (92% on-time); avoid 10 p.m. departures (77%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 84% | 10 min |
| Tuesday | 86% | 11 min |
| Wednesday | 89% | 6 min |
| Thursday | 86% | 13 min |
| Friday | 80% | 20 min |
| Saturdaybest | 90% | 6 min |
| Sunday | 82% | 14 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft32%
- Airline operations52%
- National airspace system16%
Frequently asked questions
- How often are flights from IAD to CVG delayed?
- 15% of IAD–CVG flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 12 minutes.
- What is the best time of day to fly from IAD to CVG?
- Departures around 8 a.m. have the best record (92% on-time), while departures around 10 p.m. have the worst (77%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from IAD to CVG?
- The scheduled IAD–CVG flight time averages 1h 41m over 388 miles. Actual arrival times vary — flights on this route land 15+ minutes late 15% of the time.
- How often are IAD to CVG flights cancelled?
- 2.1% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, slightly above the national rate of 1.6%.
- What is the worst month to fly from IAD to CVG?
- June 2026 was the roughest month in this dataset, with only 67% of arrivals on time. The best was October 2024 at 100%. If your dates are flexible, that 33-point gap is worth planning around.
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Based on 959 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.