Flight OddsDL1399 BOS → MIA
Delta Air Lines · Boston, MA to Miami, FL · 345 flights observed, 2025-07-01 to 2026-06-30 · 1,258 mi
DL1399 covers more than one route in the data window — the stats below are for BOS → MIA, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
86%
Median delay
-8 min
90th percentile
+27 min
Cancellation rate
2%
How often is DL1399 on time?
Across 345 flights on BOS → MIA from 2025-07-01 to 2026-06-30, DL1399 arrived within 15 minutes of schedule 86% of the time. The median arrival delay was -8 min, and the worst 10% of flights arrived +27 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 | 290 | 86% |
| 16-30 min | 18 | 5% |
| 31-60 min | 16 | 5% |
| 61-120 min | 3 | 1% |
| 2+ hrs | 11 | 3% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 29 | 93% | -11 min |
| 2025-08 | 31 | 97% | -8 min |
| 2025-09 | 30 | 90% | -3 min |
| 2025-10 | 31 | 84% | +2 min |
| 2025-11 | 29 | 90% | +5 min |
| 2025-12 | 19 | 74% | +7 min |
| 2026-01 | 25 | 80% | +21 min |
| 2026-02 | 23 | 78% | +0 min |
| 2026-03 | 30 | 87% | +7 min |
| 2026-04 | 30 | 83% | -7 min |
| 2026-05 | 31 | 84% | +25 min |
| 2026-06 | 30 | 83% | +0 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 48 | 88% |
| Tue | 49 | 92% |
| Wed | 49 | 94% |
| Thu | 49 | 80% |
| Fri | 50 | 84% |
| Sat | 45 | 82% |
| Sun | 48 | 81% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…