Flight OddsDL1966 JFK → SJU
Delta Air Lines · New York, NY to San Juan, PR · 304 flights observed, 2025-07-01 to 2026-06-30 · 1,598 mi
DL1966 covers more than one route in the data window — the stats below are for JFK → SJU, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
83%
Median delay
-12 min
90th percentile
+31 min
Cancellation rate
3%
How often is DL1966 on time?
Across 304 flights on JFK → SJU from 2025-07-01 to 2026-06-30, DL1966 arrived within 15 minutes of schedule 83% of the time. The median arrival delay was -12 min, and the worst 10% of flights arrived +31 min or later. 3% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 242 | 83% |
| 16-30 min | 21 | 7% |
| 31-60 min | 19 | 6% |
| 61-120 min | 9 | 3% |
| 2+ hrs | 2 | 1% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 30 | 87% | -8 min |
| 2025-08 | 31 | 77% | -6 min |
| 2025-09 | 30 | 90% | -9 min |
| 2025-10 | 11 | 64% | +16 min |
| 2025-11 | 8 | 75% | -3 min |
| 2025-12 | 10 | 90% | -12 min |
| 2026-01 | 28 | 71% | +9 min |
| 2026-02 | 26 | 69% | +9 min |
| 2026-03 | 30 | 93% | -12 min |
| 2026-04 | 30 | 90% | -8 min |
| 2026-05 | 30 | 83% | -8 min |
| 2026-06 | 29 | 86% | -5 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 40 | 83% |
| Tue | 42 | 81% |
| Wed | 43 | 84% |
| Thu | 43 | 81% |
| Fri | 41 | 93% |
| Sat | 42 | 83% |
| Sun | 42 | 74% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…