Flight Reliability
DL 4159 · Delta Air Lines
Detroit → ATW (DTW–ATW)
47
Bring Snacks
WanderNerd Reliability Score
- 68%
- Arrive within 15 minutes
- 38 min
- Average arrival delay
- 3.0%
- Cancelled
- 7 min early
- Median arrival delay
Based on 166 historical flights. Data through May 2026.
What the data says
Thursdays have been rough.
DL 4159 arrived on time 82% of the time on Saturdays and just 57% on Thursdays. That gap is worth planning around.
Lagging the DTW–ATW route.
DL 4159 arrived on time 68% of the time, versus 75% across the DTW–ATW route.
Lagging the Delta Air Lines network.
DL 4159 arrived on time 68% of the time, versus 81% across the Delta Air Lines network.
Keep a backup plan handy.
DL 4159 was cancelled 3.0% of the time. Typical for U.S. flights is around 1–2%.
The breakdown
- Mon67%(24 flights)
- Tue74%(23 flights)
- Wed71%(24 flights)
- Thu57%(23 flights)
- Fri61%(23 flights)
- Sat82%(22 flights)
- Sun62%(21 flights)
- 6–9 PM66%(153 flights)
- 9 PM–12 AM—(7 flights)
81%
May
Dec 75% → May 81% on time
| Month | On-time percentage | Flights |
|---|---|---|
| December 2025 | 75% | 12 |
| January 2026 | 53% | 30 |
| February 2026 | 71% | 24 |
| March 2026 | 54% | 26 |
| April 2026 | 67% | 30 |
| May 2026 | 81% | 31 |
- Departures on time
- 65%
- Diverted
- 0.6%
- Flights flown
- 160
- Months covered
- 7
Same route, other flights
Keep nerding
Based on 166 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.