Flight Reliability
NK 656 · Spirit Airlines
San Juan → Philadelphia (SJU–PHL)
4
Bring Snacks
WanderNerd Reliability Score
- 52%
- Arrive within 15 minutes
- 22 min
- Average arrival delay
- 12.5%
- Cancelled
- 15 min
- Median arrival delay
Based on 88 historical flights. Data through May 2026.
What the data says
Tuesdays have been rough.
NK 656 arrived on time 67% of the time on Sundays and just 33% on Tuesdays. That gap is worth planning around.
Well behind the SJU–PHL route.
NK 656 arrived on time 52% of the time, versus 70% across the SJU–PHL route.
Well behind the Spirit Airlines network.
NK 656 arrived on time 52% of the time, versus 74% across the Spirit Airlines network.
The breakdown
- Mon36%(11 flights)
- Tue33%(12 flights)
- Wed—(9 flights)
- Thu—(7 flights)
- Fri39%(13 flights)
- Sat62%(13 flights)
- Sun67%(12 flights)
10%
Apr
Jan 81% → Apr 10% on time
| Month | On-time percentage | Flights |
|---|---|---|
| January 2026 | 81% | 16 |
| February 2026 | 64% | 25 |
| March 2026 | 39% | 26 |
| April 2026 | 10% | 10 |
- Departures on time
- 46%
- Diverted
- 0%
- Flights flown
- 77
- Months covered
- 4
Same route, other flights
Keep nerding
Based on 88 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.