Flight Reliability
DL 4290 · Delta Air Lines
Detroit → IMT (DTW–IMT)
54
A Little Dicey
WanderNerd Reliability Score
- 72%
- Arrive within 15 minutes
- 32 min
- Average arrival delay
- 2.7%
- Cancelled
- 6 min early
- Median arrival delay
Based on 365 historical flights. Data through May 2026.
What the data says
Tuesday is the weak spot.
DL 4290 arrived on time 78% of the time on Thursdays. On Tuesdays: 67%.
Lagging the Delta Air Lines network.
DL 4290 arrived on time 72% of the time, versus 81% across the Delta Air Lines network.
Trending in the right direction.
DL 4290 arrived on time 66% of the time over the last three months in the data, compared with 54% in the three months before that.
The breakdown
- Mon68%(50 flights)
- Tue67%(51 flights)
- Wed76%(49 flights)
- Thu78%(51 flights)
- Fri71%(49 flights)
- Sat69%(49 flights)
- Sun75%(52 flights)
74%
May
Jun 83% → May 74% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 83% | 29 |
| July 2025 | 83% | 30 |
| August 2025 | 90% | 31 |
| September 2025 | 87% | 30 |
| October 2025 | 74% | 31 |
| November 2025 | 83% | 29 |
| December 2025 | 46% | 28 |
| January 2026 | 52% | 29 |
| February 2026 | 63% | 27 |
| March 2026 | 52% | 27 |
| April 2026 | 72% | 29 |
| May 2026 | 74% | 31 |
- Departures on time
- 75%
- Diverted
- 1.1%
- Flights flown
- 351
- Months covered
- 12
Keep nerding
Based on 365 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.