Flight Reliability
NK 3906 · Spirit Airlines
Tampa → San Juan (TPA–SJU)
37
Bring Snacks
WanderNerd Reliability Score
- 84%
- Arrive within 15 minutes
- 9 min early
- Average arrival delay
- 13.7%
- Cancelled
- 12 min early
- Median arrival delay
Based on 51 historical flights. Data through May 2026.
What the data says
The 6–9 AM departure wins.
NK 3906 departing between 6–9 AM arrived on time 89% of the time, versus 77% between 9 AM–12 PM.
Better than the TPA–SJU route average.
NK 3906 arrived on time 84% of the time, versus 75% across the TPA–SJU route.
Better than the Spirit Airlines network average.
NK 3906 arrived on time 84% of the time, versus 74% across the Spirit Airlines network.
The breakdown
- Mon—(7 flights)
- Tue—(7 flights)
- Wed—(6 flights)
- Thu—(5 flights)
- Fri—(7 flights)
- Sat—(7 flights)
- Sun—(5 flights)
- 6–9 AM89%(27 flights)
- 9 AM–12 PM77%(17 flights)
- Departures on time
- 82%
- Diverted
- 0%
- Flights flown
- 44
- Months covered
- 3
Same route, other flights
Keep nerding
Based on 51 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.