Flight OddsDL1187 DTW → BOS
Delta Air Lines · Detroit, MI to Boston, MA · 352 flights observed, 2025-07-01 to 2026-06-30 · 632 mi
On-time arrival
72%
Median delay
-6 min
90th percentile
+64 min
Cancellation rate
2%
How often is DL1187 on time?
Across 352 flights on DTW → BOS from 2025-07-01 to 2026-06-30, DL1187 arrived within 15 minutes of schedule 72% of the time. The median arrival delay was -6 min, and the worst 10% of flights arrived +64 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 | 248 | 72% |
| 16-30 min | 30 | 9% |
| 31-60 min | 28 | 8% |
| 61-120 min | 19 | 6% |
| 2+ hrs | 19 | 6% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 26 | 58% | +28 min |
| 2025-08 | 24 | 54% | +24 min |
| 2025-09 | 29 | 76% | -2 min |
| 2025-10 | 30 | 87% | +0 min |
| 2025-11 | 29 | 72% | +6 min |
| 2025-12 | 31 | 58% | +45 min |
| 2026-01 | 29 | 69% | +10 min |
| 2026-02 | 26 | 85% | +9 min |
| 2026-03 | 31 | 74% | +12 min |
| 2026-04 | 29 | 83% | -3 min |
| 2026-05 | 31 | 77% | +3 min |
| 2026-06 | 29 | 69% | +13 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 50 | 62% |
| Tue | 53 | 75% |
| Wed | 52 | 77% |
| Thu | 50 | 84% |
| Fri | 50 | 72% |
| Sat | 41 | 78% |
| Sun | 48 | 56% |
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…