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Flight Reliability

F9 1165 · Frontier Airlines

San Juan → Philadelphia (SJU–PHL)

52
A Little Dicey
WanderNerd Reliability Score
61%
Arrive within 15 minutes
25 min
Average arrival delay
1.8%
Cancelled
5 min
Median arrival delay

Based on 334 historical flights. Data through May 2026.

What the data says

The 3–6 PM departure wins.

F9 1165 departing between 3–6 PM arrived on time 64% of the time, versus 57% between 9 AM–12 PM.

Sunday scaries are real for this one.

F9 1165 arrived on time 69% of the time on Fridays and just 47% on Sundays. That gap is worth planning around.

Lagging the SJU–PHL route.

F9 1165 arrived on time 61% of the time, versus 70% across the SJU–PHL route.

Lagging the Frontier Airlines network.

F9 1165 arrived on time 61% of the time, versus 73% across the Frontier Airlines network.

The breakdown

On-time by weekday
  • Mon56%(48 flights)
  • Tue66%(41 flights)
  • Wed65%(40 flights)
  • Thu57%(49 flights)
  • Fri69%(52 flights)
  • Sat67%(49 flights)
  • Sun47%(47 flights)
On-time by departure window
  • 9 AM–12 PM57%(118 flights)
  • 12–3 PM63%(194 flights)
  • 3–6 PM64%(14 flights)
On-time trend by month
73%
May

Jun 73% → May 73% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202573%30
July 202542%31
August 202566%29
September 202550%28
October 202558%31
November 202581%26
December 202550%22
January 202635%17
February 202654%24
March 202668%28
April 202670%30
May 202673%30
Departures on time
60%
Diverted
0.6%
Flights flown
326
Months covered
12

Same route, other flights

Keep nerding

Based on 334 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.