Flight OddsDL3939 IAD → DTW
Delta Air Lines · Washington, DC to Detroit, MI · 62 flights observed, 2026-01-05 to 2026-03-07 · 383 mi
DL3939 covers more than one route in the data window — the stats below are for IAD → DTW, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
53%
Median delay
+8 min
90th percentile
+105 min
Cancellation rate
3%
How often is DL3939 on time?
Across 62 flights on IAD → DTW from 2026-01-05 to 2026-03-07, DL3939 arrived within 15 minutes of schedule 53% of the time. The median arrival delay was +8 min, and the worst 10% of flights arrived +105 min or later. 3% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 32 | 53% |
| 16-30 min | 5 | 8% |
| 31-60 min | 11 | 18% |
| 61-120 min | 7 | 12% |
| 2+ hrs | 5 | 8% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-01 | 25 | 52% | +28 min |
| 2026-02 | 28 | 54% | +43 min |
| 2026-03 | 7 | 57% | +16 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 8 | 38% |
| Tue | 9 | 67% |
| Wed | 9 | 67% |
| Thu | 9 | 67% |
| Fri | 9 | 44% |
| Sat | 9 | 44% |
| Sun | 7 | 43% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…