Flight OddsDL403 SJU → BOS
Delta Air Lines · San Juan, PR to Boston, MA · 25 flights observed, 2025-09-11 to 2025-10-05 · 1,674 mi
DL403 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
80%
Median delay
-7 min
90th percentile
+27 min
Cancellation rate
0%
How often is DL403 on time?
Across 25 flights on SJU → BOS from 2025-09-11 to 2025-10-05, DL403 arrived within 15 minutes of schedule 80% of the time. The median arrival delay was -7 min, and the worst 10% of flights arrived +27 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 | 20 | 80% |
| 16-30 min | 4 | 16% |
| 31-60 min | 1 | 4% |
| 61-120 min | 0 | 0% |
| 2+ hrs | 0 | 0% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-09 | 20 | 85% | -4 min |
| 2025-10 | 5 | 60% | +8 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 3 | 100% |
| Tue | 3 | 100% |
| Wed | 3 | 33% |
| Thu | 4 | 100% |
| Fri | 4 | 75% |
| Sat | 4 | 100% |
| Sun | 4 | 50% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…