Flight OddsDL4121 DTW → MSN
Delta Air Lines · Detroit, MI to Madison, WI · 18 flights observed, 2026-02-12 to 2026-03-06 · 311 mi
DL4121 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
72%
Median delay
-10 min
90th percentile
+43 min
Cancellation rate
0%
How often is DL4121 on time?
Across 18 flights on DTW → MSN from 2026-02-12 to 2026-03-06, DL4121 arrived within 15 minutes of schedule 72% of the time. The median arrival delay was -10 min, and the worst 10% of flights arrived +43 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 | 13 | 72% |
| 16-30 min | 2 | 11% |
| 31-60 min | 1 | 6% |
| 61-120 min | 1 | 6% |
| 2+ hrs | 1 | 6% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-02 | 12 | 75% | -3 min |
| 2026-03 | 6 | 67% | +22 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 3 | 67% |
| Tue | 2 | 50% |
| Wed | 3 | 100% |
| Thu | 4 | 75% |
| Fri | 4 | 100% |
| Sat | No data | — |
| Sun | 2 | 0% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…