Flight Reliability
DL 4815 · Delta Air Lines
Nashville → Detroit (BNA–DTW)86% of its flights flew this route. The rest (ATL–AVL, ATL–JAN) are included in these numbers.
62
A Little Dicey
WanderNerd Reliability Score
- 67%
- Arrive within 15 minutes
- 16 min
- Average arrival delay
- 2.4%
- Cancelled
- 0 min
- Median arrival delay
Based on 83 historical flights. Data through May 2026.
What the data says
Friday is doing you no favors.
DL 4815 arrived on time 69% of the time on Sundays. On Fridays: 57%.
Lagging the BNA–DTW route.
DL 4815 arrived on time 67% of the time, versus 80% across the BNA–DTW route.
Lagging the Delta Air Lines network.
DL 4815 arrived on time 67% of the time, versus 81% across the Delta Air Lines network.
The breakdown
- Mon57%(14 flights)
- Tue—(9 flights)
- Wed—(9 flights)
- Thu67%(15 flights)
- Fri57%(14 flights)
- Sat—(7 flights)
- Sun69%(13 flights)
- 3–6 PM—(4 flights)
- 6–9 PM66%(77 flights)
86%
Sep
Jun 67% → Sep 86% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 67% | 21 |
| July 2025 | 48% | 23 |
| August 2025 | 76% | 21 |
| September 2025 | 86% | 14 |
- Departures on time
- 64%
- Diverted
- 0%
- Flights flown
- 81
- Months covered
- 5
Same route, other flights
Keep nerding
Based on 83 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.