Flight OddsDL1780 SJU → BOS
Delta Air Lines · San Juan, PR to Boston, MA · 324 flights observed, 2025-07-01 to 2026-06-30 · 1,674 mi
DL1780 covers more than one route in the data window — the stats below are for SJU → BOS, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
82%
Median delay
-10 min
90th percentile
+34 min
Cancellation rate
1%
How often is DL1780 on time?
Across 324 flights on SJU → BOS from 2025-07-01 to 2026-06-30, DL1780 arrived within 15 minutes of schedule 82% of the time. The median arrival delay was -10 min, and the worst 10% of flights arrived +34 min or later. 1% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 260 | 82% |
| 16-30 min | 24 | 8% |
| 31-60 min | 20 | 6% |
| 61-120 min | 8 | 3% |
| 2+ hrs | 6 | 2% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 31 | 100% | -14 min |
| 2025-08 | 29 | 86% | -8 min |
| 2025-09 | 10 | 60% | +22 min |
| 2025-10 | 26 | 81% | -1 min |
| 2025-11 | 30 | 87% | -9 min |
| 2025-12 | 19 | 89% | -16 min |
| 2026-01 | 25 | 76% | +18 min |
| 2026-02 | 27 | 74% | +18 min |
| 2026-03 | 31 | 74% | +13 min |
| 2026-04 | 30 | 73% | 0 min |
| 2026-05 | 31 | 84% | -2 min |
| 2026-06 | 29 | 83% | +1 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 45 | 82% |
| Tue | 47 | 83% |
| Wed | 47 | 74% |
| Thu | 45 | 82% |
| Fri | 46 | 87% |
| Sat | 45 | 84% |
| Sun | 43 | 79% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…