IAD to CVG flight delays & on-time performance
Nonstop flights from Washington Dulles International Airport to Cincinnati Northern Kentucky International Airport · 388 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at IAD or CVG right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Washington (IAD) to Cincinnati (CVG) arrived on time 81% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 2.4% were cancelled, and 8% arrived an hour or more late.
- Departures scheduled around 8am did best (88% on time); around 10pm did worst (75%).
- Wednesday was the most reliable day to fly (86% on time) and Friday the least (73%).
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (50%).
Which airline is most on time from IAD to CVG?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| Republic AirwaysRegional airline operating flights for American Eagle, Delta Connection and United Express. | 81% | 2.5% | 16 min | 7.8% | 515 |
| United Airlines | 78% | 0.0% | 21 min | 11.1% | 19 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 8am88%121 flights
- 12pm85%48 flights
- 5pm80%176 flights
- 10pm75%189 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday81%2.3% cancelled
- Tuesday84%4.9% cancelled
- Wednesday86%1.4% cancelled
- Thursday77%1.3% cancelled
- Friday73%0.0% cancelled
- Saturday85%2.9% cancelled
- Sunday81%4.8% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Airline (crew, maintenance, cleaning, fueling)50%
- Late-arriving aircraft33%
- Air traffic control & airport congestion17%
- Extreme weather0%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather54%
- Air traffic control & airport congestion38%
- Airline (crew, maintenance, cleaning, fueling)8%
- Security0%
IAD to CVG: common questions
- How often are IAD to CVG flights on time?
- 81% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Washington to Cincinnati cancelled?
- 2.4% of scheduled flights were cancelled (13 of 534).
- How long are typical delays?
- Across all flights the average arrival delay was 17 min (early arrivals count as zero). Flights that were late arrived 83 min behind schedule on average, and 7.9% of flights were an hour or more late.
- How long is taxi time at IAD?
- Flights on this route spent 20 min taxiing from the gate to takeoff on average.
Related routes
Return trip: CVG to IAD — 87% on time
More flights from Washington
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: IAD → CVG, nonstop flights by US airlines that report to the DOT. How we calculate this.