Flight OddsDL4109 DTW → GRR
Delta Air Lines · Detroit, MI to Grand Rapids, MI · 35 flights observed, 2025-07-01 to 2025-08-08 · 120 mi
DL4109 covers more than one route in the data window — the stats below are for DTW → GRR, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
51%
Median delay
+12 min
90th percentile
+142 min
Cancellation rate
0%
How often is DL4109 on time?
Across 35 flights on DTW → GRR from 2025-07-01 to 2025-08-08, DL4109 arrived within 15 minutes of schedule 51% of the time. The median arrival delay was +12 min, and the worst 10% of flights arrived +142 min or later. 0% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 18 | 51% |
| 16-30 min | 3 | 9% |
| 31-60 min | 6 | 17% |
| 61-120 min | 4 | 11% |
| 2+ hrs | 4 | 11% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 28 | 46% | +57 min |
| 2025-08 | 7 | 71% | +15 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 5 | 20% |
| Tue | 6 | 67% |
| Wed | 6 | 50% |
| Thu | 6 | 17% |
| Fri | 6 | 83% |
| Sat | 1 | 100% |
| Sun | 5 | 60% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…