Flight OddsDL1864 SJU → BOS
Delta Air Lines · San Juan, PR to Boston, MA · 14 flights observed, 2026-01-10 to 2026-04-11 · 1,674 mi
DL1864 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
71%
Median delay
-9 min
90th percentile
+116 min
Cancellation rate
0%
How often is DL1864 on time?
Across 14 flights on SJU → BOS from 2026-01-10 to 2026-04-11, DL1864 arrived within 15 minutes of schedule 71% of the time. The median arrival delay was -9 min, and the worst 10% of flights arrived +116 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 | 10 | 71% |
| 16-30 min | 0 | 0% |
| 31-60 min | 1 | 7% |
| 61-120 min | 1 | 7% |
| 2+ hrs | 2 | 14% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-01 | 4 | 75% | +9 min |
| 2026-02 | 4 | 100% | -8 min |
| 2026-03 | 4 | 75% | +3 min |
| 2026-04 | 2 | 0% | +140 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | No data | — |
| Tue | No data | — |
| Wed | No data | — |
| Thu | No data | — |
| Fri | No data | — |
| Sat | 14 | 71% |
| Sun | No data | — |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…