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Flight Reliability

F9 1726 · Frontier Airlines

Philadelphia → San Juan (PHL–SJU)

46
Bring Snacks
WanderNerd Reliability Score
55%
Arrive within 15 minutes
28 min
Average arrival delay
2.0%
Cancelled
13 min
Median arrival delay

Based on 147 historical flights. Data through May 2026.

What the data says

The late departure is the smart one here.

F9 1726 departing between 9 PM–12 AM arrived on time 95% of the time, versus 30% between 6–9 PM.

Saturdays have been rough.

F9 1726 arrived on time 64% of the time on Thursdays and just 39% on Saturdays. That gap is worth planning around.

Lagging the PHL–SJU route.

F9 1726 arrived on time 55% of the time, versus 63% across the PHL–SJU route.

Well behind the Frontier Airlines network.

F9 1726 arrived on time 55% of the time, versus 73% across the Frontier Airlines network.

The breakdown

On-time by weekday
  • Mon62%(29 flights)
  • Tue—(9 flights)
  • Wed—(7 flights)
  • Thu64%(25 flights)
  • Fri40%(35 flights)
  • Sat39%(13 flights)
  • Sun62%(26 flights)
On-time by departure window
  • 9 AM–12 PM—(4 flights)
  • 12–3 PM66%(32 flights)
  • 3–6 PM44%(79 flights)
  • 6–9 PM30%(10 flights)
  • 9 PM–12 AM95%(19 flights)
On-time trend by month
91%
May

Aug 46% → May 91% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
August 202546%11
November 202570%10
December 202558%12
January 202642%19
March 202630%20
April 202650%22
May 202691%23
Departures on time
60%
Diverted
0%
Flights flown
144
Months covered
11

Same route, other flights

Keep nerding

Based on 147 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.