Flight OddsSJU → BOS Spirit Airlines
Spirit Airlines · San Juan, PR to Boston, MA · 154 flights, 2025-07-03 to 2026-04-28 · aggregated across 6 flight numbers
On-time arrival
74%
Median delay
-7 min
90th percentile
+61 min
Cancellation rate
4%
How on-time is Spirit Airlines from SJU to BOS?
Across every Spirit Airlines flight number on SJU → BOS (154 flights, 2025-07-03 to 2026-04-28), 74% arrived within 15 minutes of schedule. Median arrival delay -7 min; the worst 10% ran +61 min or later. 4% were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 109 | 74% |
| 16-30 min | 13 | 9% |
| 31-60 min | 9 | 6% |
| 61-120 min | 12 | 8% |
| 2+ hrs | 4 | 3% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 9 | 67% | 0 min |
| 2025-08 | 3 | 67% | -5 min |
| 2025-12 | 13 | 54% | +19 min |
| 2026-01 | 22 | 82% | +5 min |
| 2026-02 | 32 | 66% | +10 min |
| 2026-03 | 41 | 85% | 0 min |
| 2026-04 | 27 | 74% | +1 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 20 | 75% |
| Tue | 19 | 68% |
| Wed | 17 | 71% |
| Thu | 26 | 69% |
| Fri | 20 | 80% |
| Sat | 20 | 70% |
| Sun | 25 | 84% |
NK flight numbers on SJU → BOS
Related
Based on US DOT Bureau of Transportation Statistics on-time data. Loading the full breakdown…