Flight OddsDL3931 IAD → DTW
Delta Air Lines · Washington, DC to Detroit, MI · 62 flights observed, 2026-01-05 to 2026-03-07 · 383 mi
DL3931 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
78%
Median delay
-11 min
90th percentile
+125 min
Cancellation rate
5%
How often is DL3931 on time?
Across 62 flights on IAD → DTW from 2026-01-05 to 2026-03-07, DL3931 arrived within 15 minutes of schedule 78% of the time. The median arrival delay was -11 min, and the worst 10% of flights arrived +125 min or later. 5% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 46 | 78% |
| 16-30 min | 3 | 5% |
| 31-60 min | 3 | 5% |
| 61-120 min | 0 | 0% |
| 2+ hrs | 7 | 12% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-01 | 25 | 80% | +15 min |
| 2026-02 | 27 | 74% | +25 min |
| 2026-03 | 7 | 86% | -4 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 7 | 71% |
| Tue | 9 | 67% |
| Wed | 9 | 89% |
| Thu | 9 | 89% |
| Fri | 9 | 89% |
| Sat | 9 | 67% |
| Sun | 7 | 71% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…