Flight OddsBOS → SJU Delta Air Lines
Delta Air Lines · Boston, MA to San Juan, PR · 398 flights, 2025-07-01 to 2026-06-30 · aggregated across 4 flight numbers
On-time arrival
77%
Median delay
-3 min
90th percentile
+36 min
Cancellation rate
2%
How on-time is Delta Air Lines from BOS to SJU?
Across every Delta Air Lines flight number on BOS → SJU (398 flights, 2025-07-01 to 2026-06-30), 77% arrived within 15 minutes of schedule. Median arrival delay -3 min; the worst 10% ran +36 min or later. 2% were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 301 | 77% |
| 16-30 min | 39 | 10% |
| 31-60 min | 31 | 8% |
| 61-120 min | 11 | 3% |
| 2+ hrs | 10 | 3% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 31 | 97% | -5 min |
| 2025-08 | 31 | 90% | 0 min |
| 2025-09 | 30 | 70% | +10 min |
| 2025-10 | 31 | 71% | +6 min |
| 2025-11 | 30 | 80% | -2 min |
| 2025-12 | 42 | 71% | +16 min |
| 2026-01 | 36 | 69% | +21 min |
| 2026-02 | 31 | 61% | +19 min |
| 2026-03 | 35 | 74% | +5 min |
| 2026-04 | 34 | 71% | +17 min |
| 2026-05 | 31 | 87% | -1 min |
| 2026-06 | 30 | 83% | +1 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 53 | 75% |
| Tue | 55 | 80% |
| Wed | 53 | 81% |
| Thu | 54 | 72% |
| Fri | 54 | 81% |
| Sat | 68 | 75% |
| Sun | 55 | 73% |
DL flight numbers on BOS → SJU
Related
Based on US DOT Bureau of Transportation Statistics on-time data. Loading the full breakdown…