Flight Reliability
F9 3548 · Frontier Airlines
San Juan → New York (SJU–JFK)
77
Usually Fine
WanderNerd Reliability Score
- 71%
- Arrive within 15 minutes
- 13 min
- Average arrival delay
- 0%
- Cancelled
- 0 min
- Median arrival delay
Based on 148 historical flights. Data through May 2026.
What the data says
Mornings have a slight edge.
Departures between 6–9 AM arrived on time 77% of the time, against 71% between 9 PM–12 AM.
Mondays have been rough.
F9 3548 arrived on time 91% of the time on Fridays and just 59% on Mondays. That gap is worth planning around.
Lagging the SJU–JFK route.
F9 3548 arrived on time 71% of the time, versus 80% across the SJU–JFK route.
It basically never cancels.
Out of 148 scheduled flights, only 0.0% were cancelled.
The breakdown
- Mon59%(22 flights)
- Tue60%(20 flights)
- Wed81%(21 flights)
- Thu67%(21 flights)
- Fri91%(21 flights)
- Sat71%(21 flights)
- Sun68%(22 flights)
- 6–9 AM77%(13 flights)
- 9 AM–12 PM—(7 flights)
- 9 PM–12 AM71%(128 flights)
77%
Apr
Jun 70% → Apr 77% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 70% | 30 |
| July 2025 | 61% | 31 |
| August 2025 | 71% | 31 |
| September 2025 | 80% | 30 |
| April 2026 | 77% | 13 |
- Departures on time
- 82%
- Diverted
- 0%
- Flights flown
- 148
- 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.