Flight OddsDL3121 DTW → MSN
Delta Air Lines · Detroit, MI to Madison, WI · 55 flights observed, 2025-10-06 to 2025-12-19 · 311 mi
DL3121 covers more than one route in the data window — the stats below are for DTW → MSN, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
76%
Median delay
-9 min
90th percentile
+49 min
Cancellation rate
2%
How often is DL3121 on time?
Across 55 flights on DTW → MSN from 2025-10-06 to 2025-12-19, DL3121 arrived within 15 minutes of schedule 76% of the time. The median arrival delay was -9 min, and the worst 10% of flights arrived +49 min or later. 2% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 41 | 76% |
| 16-30 min | 5 | 9% |
| 31-60 min | 4 | 7% |
| 61-120 min | 2 | 4% |
| 2+ hrs | 2 | 4% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-10 | 19 | 89% | -8 min |
| 2025-11 | 19 | 84% | +7 min |
| 2025-12 | 16 | 50% | +25 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 10 | 90% |
| Tue | 9 | 67% |
| Wed | 9 | 78% |
| Thu | 9 | 78% |
| Fri | 8 | 63% |
| Sat | 1 | 100% |
| Sun | 8 | 75% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…