Flight OddsDL3821 DTW → SDF
Delta Air Lines · Detroit, MI to Louisville, KY · 108 flights observed, 2026-02-12 to 2026-06-30 · 306 mi
DL3821 covers more than one route in the data window — the stats below are for DTW → SDF, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
83%
Median delay
-11 min
90th percentile
+35 min
Cancellation rate
2%
How often is DL3821 on time?
Across 108 flights on DTW → SDF from 2026-02-12 to 2026-06-30, DL3821 arrived within 15 minutes of schedule 83% of the time. The median arrival delay was -11 min, and the worst 10% of flights arrived +35 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 | 88 | 83% |
| 16-30 min | 6 | 6% |
| 31-60 min | 7 | 7% |
| 61-120 min | 3 | 3% |
| 2+ hrs | 2 | 2% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-02 | 17 | 65% | +24 min |
| 2026-03 | 29 | 76% | +1 min |
| 2026-04 | 30 | 93% | -10 min |
| 2026-05 | 6 | 100% | -14 min |
| 2026-06 | 24 | 88% | -5 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 16 | 75% |
| Tue | 16 | 100% |
| Wed | 14 | 71% |
| Thu | 15 | 73% |
| Fri | 15 | 80% |
| Sat | 14 | 93% |
| Sun | 16 | 88% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…