Flight Reliability
F9 3547 · Frontier Airlines
New York → San Juan (JFK–SJU)
59
A Little Dicey
WanderNerd Reliability Score
- 58%
- Arrive within 15 minutes
- 19 min
- Average arrival delay
- 0.7%
- Cancelled
- 10 min
- Median arrival delay
Based on 148 historical flights. Data through May 2026.
What the data says
12–3 PM has a slight edge.
Departures between 12–3 PM arrived on time 62% of the time, against 58% between 6–9 AM.
Sunday scaries are real for this one.
F9 3547 arrived on time 76% of the time on Fridays and just 46% on Sundays. That gap is worth planning around.
Lagging the JFK–SJU route.
F9 3547 arrived on time 58% of the time, versus 72% across the JFK–SJU route.
Well behind the Frontier Airlines network.
F9 3547 arrived on time 58% of the time, versus 73% across the Frontier Airlines network.
The breakdown
- Mon62%(21 flights)
- Tue48%(21 flights)
- Wed60%(20 flights)
- Thu48%(21 flights)
- Fri76%(21 flights)
- Sat67%(21 flights)
- Sun46%(22 flights)
- 6–9 AM58%(127 flights)
- 12–3 PM62%(13 flights)
- 3–6 PM—(7 flights)
62%
Apr
Jun 55% → Apr 62% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 55% | 29 |
| July 2025 | 71% | 31 |
| August 2025 | 48% | 31 |
| September 2025 | 57% | 30 |
| April 2026 | 62% | 13 |
- Departures on time
- 82%
- Diverted
- 0%
- Flights flown
- 147
- Months covered
- 7
Same route, other flights
Keep nerding
Based on 148 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.