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Flight Reliability

F9 1015 · Frontier Airlines

San Juan → Philadelphia (SJU–PHL)

29
Bring Snacks
WanderNerd Reliability Score
57%
Arrive within 15 minutes
35 min
Average arrival delay
5.6%
Cancelled
9 min
Median arrival delay

Based on 321 historical flights. Data through May 2026.

What the data says

The 6–9 AM departure wins.

F9 1015 departing between 6–9 AM arrived on time 93% of the time, versus 53% between 12–3 AM.

Mondays have been rough.

F9 1015 arrived on time 69% of the time on Wednesdays and just 42% on Mondays. That gap is worth planning around.

Lagging the SJU–PHL route.

F9 1015 arrived on time 57% of the time, versus 70% across the SJU–PHL route.

Well behind the Frontier Airlines network.

F9 1015 arrived on time 57% of the time, versus 73% across the Frontier Airlines network.

The breakdown

On-time by weekday
  • Mon42%(45 flights)
  • Tue45%(38 flights)
  • Wed69%(35 flights)
  • Thu66%(47 flights)
  • Fri65%(43 flights)
  • Sat57%(47 flights)
  • Sun53%(47 flights)
On-time by departure window
  • 12–3 AM53%(275 flights)
  • 6–9 AM93%(27 flights)
On-time trend by month
87%
May

Jun 46% → May 87% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202546%28
July 202535%26
August 202525%24
September 202562%21
October 202579%29
November 202565%23
December 202535%29
January 202677%17
February 202653%17
March 202645%29
April 202671%28
May 202687%31
Departures on time
59%
Diverted
0.3%
Flights flown
302
Months covered
12

Same route, other flights

Keep nerding

Based on 321 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.