Flight Reliability
F9 3305 · Frontier Airlines
San Juan → Jacksonville (SJU–JAX)
79
Usually Fine
WanderNerd Reliability Score
- 84%
- Arrive within 15 minutes
- 1 min
- Average arrival delay
- 3.2%
- Cancelled
- 15 min early
- Median arrival delay
Based on 125 historical flights. Data through May 2026.
What the data says
Morning-you made the right choice.
F9 3305 departing between 6–9 AM arrived on time 95% of the time, versus 60% between 3–6 PM.
Skip Monday if you can.
F9 3305 arrived on time 91% of the time on Fridays. On Mondays: 78%.
Better than the Frontier Airlines network average.
F9 3305 arrived on time 84% of the time, versus 73% across the Frontier Airlines network.
Keep a backup plan handy.
F9 3305 was cancelled 3.2% of the time. Typical for U.S. flights is around 1–2%.
The breakdown
- Mon78%(18 flights)
- Tue—(6 flights)
- Wed—(5 flights)
- Thu88%(25 flights)
- Fri91%(22 flights)
- Sat82%(17 flights)
- Sun86%(28 flights)
- 6–9 AM95%(79 flights)
- 12–3 PM—(2 flights)
- 3–6 PM60%(40 flights)
100%
May
Jun 95% → May 100% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 95% | 21 |
| July 2025 | 100% | 20 |
| August 2025 | 69% | 13 |
| December 2025 | 60% | 20 |
| January 2026 | 60% | 10 |
| May 2026 | 100% | 23 |
- Departures on time
- 79%
- Diverted
- 0%
- Flights flown
- 121
- Months covered
- 8
Same route, other flights
Keep nerding
Based on 125 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.