Flight profile · Frontier Airlines
F91015
San Juan (SJU) to Philadelphia (PHL) · scheduled 12:59 AM – 5:00 AM
How F91015 performs
706 operations, April 2024 – July 2026.
F91015 arrived on time 54.9% of the time, against 67.1% for all SJU → PHL flights, so this departure is 12.2 percentage points worse than the route as a whole.
Source: US DOT Bureau of Transportation Statistics · 706 operations, April 2024 – July 2026 · If F91015 is cancelled or significantly changed, DOT’s automatic refund rule may entitle you to your money back. The refund checker walks through eligibility.
Where F91015 is right now
A live reading, only if you ask for it. It is not part of the reliability record above.
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Against the rest of the route
| Flight or route | On time | Cancelled | Median delay | Severe | Flights |
|---|---|---|---|---|---|
| F91015 | 54.9% | 4.25% | 10 min | 15.9% | 706 |
| Frontier Airlines on SJU → PHL | 55.6% | 2.93% | 9 min | 16.9% | 2,458 |
| All SJU → PHL flights | 67.1% | 2.40% | -1 min | 12.2% | 5,116 |
F91015 has cancelled 4.25% of its scheduled departures (30 of 706), against 2.40% for all SJU → PHL flights — this specific departure cancels 1.9 percentage points more often than the route as a whole. Different flight numbers on the same route can carry different aircraft, crews and schedules, so this is a fact about F91015 specifically, not about the route it flies.
Source: FlyerIntel analysis of US DOT BTS data · April 2024 – July 2026
Why F91015 runs late
Where US DOT attributed the delay minutes on this flight.
the inbound aircraft was late, so this flight started late
crew, maintenance, boarding and fueling, all within the carrier’s control
airspace and airport capacity, including weather-driven flow control
weather severe enough to stop this flight specifically
Share of the delay minutes US DOT attributed to each cause for F91015 on SJU → PHL. Only delays of 15 minutes or more are attributed.
Source: US DOT Bureau of Transportation Statistics · Data covering April 2024 – July 2026
Does a late aircraft delay this flight?
How often the plane that flies F91015 comes in late, and what that does to the departure.
When the aircraft came in 15 or more minutes late, F91015 pushed back an average of 70 minutes late; when it came in on time or early, an average of 5 minutes late.
Each departure is matched to the flight the same aircraft flew into SJU just before it, using the tail number in the DOT file, 618 of 678 departures in all. A departure is left out when that flight is unknown, was cancelled or diverted, or the aircraft had sat for more than 12 hours. A flight the airline cancelled never left and is not in the count, and one flown by a substitute aircraft is matched to the aircraft that flew it, not to the one first planned.
Against the network at the same turn length
| Share of departures | Inbound landed 15+ late | Left 15+ late after a late inbound | Left 15+ late after an on-time inbound |
|---|---|---|---|
| F91015 | 39% | 70% | 15% |
| Network, same turn | 17% | 68% | 9% |
The schedule leaves a normal turn: enough time to clean and board if the aircraft is on time, little to spare if it is not.
The network row is every flight with a scheduled turn of 60 to 89 minutes. How often F91015’s aircraft landed 15 or more minutes late is higher than the network’s and, once the aircraft was late, how often F91015 left 15 or more minutes late is about the same as the network’s.
More: Which Flight Numbers Pay for a Late Aircraft lists the flight numbers that pass a late aircraft on.
Source: US DOT Bureau of Transportation Statistics · Data covering April 2024 – July 2026
From pushback to gate
When it leaves SJU late, does that still matter by the time it reaches PHL?
On arrival at PHL, F91015 spends 13.7 min taxiing from touchdown to the gate — ground time a connecting passenger sits through before they can even leave the aircraft, on top of however late the flight itself ran. That is 5.5 minutes longer than a typical PHL arrival (8.2 min).
Departure delay is averaged over every pushback and arrival delay over every completed arrival, so the two counts differ by the flights that never reached PHL. Taxi-out is gate to wheels up and sits inside the scheduled block rather than on top of it; the comparison is 1,053 departures from SJU scheduled in the clock hour F91015 most often leaves in. Taxi-in is landing to gate, compared against every arrival FlyerIntel has on file at PHL (305,143 flights), not just F91015’s own. More on taxi time.
Source: FlyerIntel analysis of US DOT BTS data · April 2024 – July 2026
The hour it leaves SJU
Part of any flight’s record belongs to the clock rather than to the flight. F91015 has one departure time, so this is what that time is worth.
On-time arrival rate. 1,053 departures from SJU are scheduled in the 12 AM–1 AM hour over the period, against 109,598 across the whole day.
F91015 is scheduled out of SJU at 12:59 AM, in the 12 AM–1 AM bank. Departures from SJU in that hour arrive on time 65.9% of the time against 76.2% across the airport’s whole day — the slot alone is worth 10.2 points worse before anything about this particular flight is considered.
The two airport figures cover every departure from SJU to every destination, so they describe the slot rather than this journey — the like-for-like comparison against the route is above. Hours are scheduled local, and a number whose schedule moved between banks inside the period has no single hour and is not described here at all. Why the hour matters.
Source: FlyerIntel analysis of US DOT BTS data · April 2024 – July 2026 · Hours below 120 departures are not scored.
Other routes F91015 has flown
A flight number is a slot in a schedule, and carriers reassign it. These are the other city pairs this number served in the analysis period.
| Route | Operated | Flights | On time |
|---|---|---|---|
| MCO→OMA Orlando to Omaha | March 8–20, 2024 | 8 | — |
| MCO→ATL Orlando to Atlanta | July 5, 2023 – November 15, 2023 | 87 | — |
Because the same number has served different journeys, the statistics above describe only the route F91015 currently operates. Blending them would produce an average of two different flights.
When it goes wrong
The average describes a usual day. This is the day that ruins a connection.
79 min late
against a median of 10 min late
F91015 has an average that understates its risk: a typical arrival is 10 min late, but the worst tenth are 69 minutes worse than that. If the trip has something unmissable at the end of it, the median is the wrong number to plan against.
Percentiles over 706 operations; cancelled and diverted flights are counted separately.
Source: US DOT Bureau of Transportation Statistics · Data covering April 2024 – July 2026
Other flights on this route
Same airports, same journey, different odds of arriving on time.
| Flight | Airline | On time | Median arrival | Operations |
|---|---|---|---|---|
| F91015 this flight | Frontier Airlines | 54.9% | 10 min late | 706 |
| F91165 | Frontier Airlines | 54.9% | 11 min late | 761 |
Every departure listed carries at least 600 operations, so the comparison is between figures that mean something. F91015 is placed in the same ordering rather than left out of it; the rows around it are the most punctual departures on the route, not all of them, so this is a comparison and not a rank. Schedules change; confirm the departure still operates before booking around this.
Data and methodology
Calculated by FlyerIntel from 706 records of F91015 operating SJU → PHL, published by the US DOT Bureau of Transportation Statistics. A flight counts as delayed when it arrives 15 or more minutes after schedule. Cancelled and diverted flights are excluded from the on-time rate and reported separately. Flight numbers are resolved as carrier plus number plus route, because the same number serves different routes over time.
Full methodology · Data sources · Report a problem
Related research: Most and Least Reliable Flight Numbers · The Delay You Inherit · Making Up Time in the Air
Analysis last recomputed