Flight Reliability
DL 2638 · Delta Air Lines
Miami → Detroit (MIA–DTW)
97
Nerd Approved
WanderNerd Reliability Score
- 90%
- Arrive within 15 minutes
- 2 min early
- Average arrival delay
- 0.3%
- Cancelled
- 11 min early
- Median arrival delay
Based on 341 historical flights. Data through May 2026.
What the data says
Sunday scaries are real for this one.
DL 2638 arrived on time 96% of the time on Thursdays. On Sundays: 86%.
Well ahead of the MIA–DTW route.
DL 2638 arrived on time 90% of the time, versus 73% across the MIA–DTW route.
Better than the Delta Air Lines network average.
DL 2638 arrived on time 90% of the time, versus 81% across the Delta Air Lines network.
It basically never cancels.
Out of 341 scheduled flights, only 0.3% were cancelled.
The breakdown
- Mon88%(49 flights)
- Tue90%(49 flights)
- Wed92%(49 flights)
- Thu96%(49 flights)
- Fri88%(48 flights)
- Sat89%(47 flights)
- Sun86%(49 flights)
97%
Apr
Jun 87% → Apr 97% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 87% | 30 |
| July 2025 | 90% | 31 |
| August 2025 | 90% | 31 |
| September 2025 | 97% | 30 |
| October 2025 | 100% | 31 |
| November 2025 | 90% | 30 |
| December 2025 | 67% | 30 |
| January 2026 | 94% | 31 |
| February 2026 | 100% | 28 |
| March 2026 | 81% | 31 |
| April 2026 | 97% | 30 |
- Departures on time
- 92%
- Diverted
- 0%
- Flights flown
- 340
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 341 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.