Flight Reliability
DL 4814 · Delta Air Lines
Knoxville → Detroit (TYS–DTW)94% of its flights flew this route. The rest (IAD–DTW) are included in these numbers.
- 85%
- Arrive within 15 minutes
- 1 min early
- Average arrival delay
- 0.5%
- Cancelled
- 15 min early
- Median arrival delay
Based on 199 historical flights. Data through May 2026.
What the data says
The 12–3 PM departure wins.
DL 4814 departing between 12–3 PM arrived on time 87% of the time, versus 67% between 3–6 PM.
Sunday scaries are real for this one.
DL 4814 arrived on time 93% of the time on Fridays and just 77% on Sundays. That gap is worth planning around.
A bit ahead of the TYS–DTW route.
DL 4814 arrived on time 85% of the time, versus 80% across the TYS–DTW route.
A bit ahead of the Delta Air Lines network.
DL 4814 arrived on time 85% of the time, versus 81% across the Delta Air Lines network.
The breakdown
- Mon79%(29 flights)
- Tue83%(29 flights)
- Wed85%(27 flights)
- Thu88%(25 flights)
- Fri93%(28 flights)
- Sat90%(30 flights)
- Sun77%(30 flights)
- 9 AM–12 PM85%(58 flights)
- 12–3 PM87%(128 flights)
- 3–6 PM67%(12 flights)
Jun 76% → Dec 68% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 76% | 21 |
| July 2025 | 85% | 27 |
| August 2025 | 97% | 31 |
| September 2025 | 93% | 30 |
| October 2025 | 90% | 30 |
| November 2025 | 79% | 28 |
| December 2025 | 68% | 28 |
- Departures on time
- 81%
- Diverted
- 0%
- Flights flown
- 198
- Months covered
- 8
Same route, other flights
Keep nerding
Based on 199 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.