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Flight Reliability

F9 3247 · Frontier Airlines

San Juan → Philadelphia (SJU–PHL)

30
Bring Snacks
WanderNerd Reliability Score
47%
Arrive within 15 minutes
41 min
Average arrival delay
2.2%
Cancelled
18 min
Median arrival delay

Based on 90 historical flights. Data through May 2026.

What the data says

6–9 PM has a slight edge.

Departures between 6–9 PM arrived on time 50% of the time, against 44% between 9 PM–12 AM.

Friday is doing you no favors.

F9 3247 arrived on time 56% of the time on Sundays and just 35% on Fridays. That gap is worth planning around.

Well behind the SJU–PHL route.

F9 3247 arrived on time 47% of the time, versus 70% across the SJU–PHL route.

Well behind the Frontier Airlines network.

F9 3247 arrived on time 47% of the time, versus 73% across the Frontier Airlines network.

The breakdown

On-time by weekday
  • Mon45%(20 flights)
  • Tue—(3 flights)
  • Wed—(1 flights)
  • Thu46%(13 flights)
  • Fri35%(26 flights)
  • Sat—(9 flights)
  • Sun56%(16 flights)
On-time by departure window
  • 6–9 AM—(4 flights)
  • 6–9 PM50%(12 flights)
  • 9 PM–12 AM44%(72 flights)
On-time trend by month
50%
Mar

Nov 60% → Mar 50% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
November 202560%10
December 202550%12
January 202640%15
March 202650%20
Departures on time
44%
Diverted
0%
Flights flown
88
Months covered
9

Same route, other flights

Keep nerding

Based on 90 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.