Flight OddsDL4166 ATW → DTW
Delta Air Lines · Appleton, WI to Detroit, MI · 239 flights observed, 2025-07-07 to 2026-06-30 · 296 mi
DL4166 covers more than one route in the data window — the stats below are for ATW → DTW, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
74%
Median delay
-12 min
90th percentile
+91 min
Cancellation rate
1%
How often is DL4166 on time?
Across 239 flights on ATW → DTW from 2025-07-07 to 2026-06-30, DL4166 arrived within 15 minutes of schedule 74% of the time. The median arrival delay was -12 min, and the worst 10% of flights arrived +91 min or later. 1% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 176 | 74% |
| 16-30 min | 16 | 7% |
| 31-60 min | 14 | 6% |
| 61-120 min | 12 | 5% |
| 2+ hrs | 19 | 8% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 25 | 44% | +55 min |
| 2025-08 | 29 | 97% | -13 min |
| 2025-09 | 30 | 97% | -18 min |
| 2025-10 | 6 | 100% | -19 min |
| 2025-12 | 9 | 44% | +41 min |
| 2026-01 | 16 | 50% | +30 min |
| 2026-02 | 9 | 22% | +85 min |
| 2026-03 | 23 | 52% | +44 min |
| 2026-04 | 30 | 93% | -5 min |
| 2026-05 | 31 | 77% | +3 min |
| 2026-06 | 29 | 83% | -3 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 36 | 72% |
| Tue | 36 | 64% |
| Wed | 32 | 75% |
| Thu | 32 | 66% |
| Fri | 35 | 71% |
| Sat | 33 | 88% |
| Sun | 33 | 85% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…