Flight Reliability
DL 4829 · Delta Air Lines
Cincinnati → Detroit (CVG–DTW)98% of its flights flew this route. The rest (CMH–DTW, DTW–CMH) are included in these numbers.
- 77%
- Arrive within 15 minutes
- 9 min
- Average arrival delay
- 1.7%
- Cancelled
- 3 min early
- Median arrival delay
Based on 177 historical flights. Data through May 2026.
What the data says
The 3–6 PM departure wins.
DL 4829 departing between 3–6 PM arrived on time 79% of the time, versus 69% between 6–9 PM.
Saturdays have been rough.
DL 4829 arrived on time 86% of the time on Wednesdays and just 58% on Saturdays. That gap is worth planning around.
A bit behind the CVG–DTW route.
DL 4829 arrived on time 77% of the time, versus 83% across the CVG–DTW route.
A bit behind the Delta Air Lines network.
DL 4829 arrived on time 77% of the time, versus 81% across the Delta Air Lines network.
The breakdown
- Mon67%(27 flights)
- Tue79%(28 flights)
- Wed86%(28 flights)
- Thu78%(27 flights)
- Fri85%(26 flights)
- Sat58%(12 flights)
- Sun77%(26 flights)
- 9 AM–12 PM—(2 flights)
- 12–3 PM—(2 flights)
- 3–6 PM79%(141 flights)
- 6–9 PM69%(29 flights)
Jun 62% → Dec 53% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 62% | 21 |
| July 2025 | 71% | 24 |
| August 2025 | 70% | 30 |
| September 2025 | 96% | 26 |
| October 2025 | 90% | 30 |
| November 2025 | 85% | 26 |
| December 2025 | 53% | 17 |
- Departures on time
- 76%
- Diverted
- 0%
- Flights flown
- 174
- Months covered
- 7
Same route, other flights
Keep nerding
Based on 177 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.