Flight OddsDL3631 MDW → DTW
Delta Air Lines · Chicago, IL to Detroit, MI · 127 flights observed, 2025-07-05 to 2025-11-08 · 228 mi
DL3631 covers more than one route in the data window — the stats below are for MDW → DTW, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
87%
Median delay
-8 min
90th percentile
+33 min
Cancellation rate
0%
How often is DL3631 on time?
Across 127 flights on MDW → DTW from 2025-07-05 to 2025-11-08, DL3631 arrived within 15 minutes of schedule 87% of the time. The median arrival delay was -8 min, and the worst 10% of flights arrived +33 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 | 110 | 87% |
| 16-30 min | 3 | 2% |
| 31-60 min | 7 | 6% |
| 61-120 min | 4 | 3% |
| 2+ hrs | 3 | 2% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 27 | 78% | +8 min |
| 2025-08 | 31 | 84% | +7 min |
| 2025-09 | 30 | 90% | -1 min |
| 2025-10 | 31 | 90% | -5 min |
| 2025-11 | 8 | 100% | -6 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 18 | 83% |
| Tue | 18 | 94% |
| Wed | 18 | 89% |
| Thu | 18 | 94% |
| Fri | 18 | 83% |
| Sat | 19 | 79% |
| Sun | 18 | 83% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…