Flight number record
F9 4462
Frontier Airlines · Philadelphia to San Juan
- Route
- PHL → SJU
- Departs
- 20:39
- Flights
- 303
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s F9 4462, check with Frontier Airlines.
F9 4462 earns an F−, which is as low as this site's scale goes for a reason. Only 50.7% of flights arrive inside the 15-minute window, 27 points worse than the national rate of 77.3%. Late arrivals average a little over an hour. Treat any tight connection here as a coin flip. That rests on 303 flights, with a median arrival 13 minutes late.
The national on-time rate over the same period is 77.3%, so F9 4462 runs 27 points behind the country as a whole. Across a thousand flights that is about 266 extra late arrivals.
Key figures
On time
50.7%
Arrivals under 15 minutes late, of 290 completed flights
Avg delay
75 min
Across delayed arrivals only, not all flights
Cancelled
3.96%
National rate is 1.89%
1 hour+ late
19.7%
National rate is 8.3%
These figures cover 303 flights between September 2025 and August 2026. Beyond the headline rate, 19.7% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When F9 4462 flies
F9 4462 flies PHL to SJU without a single fixed slot. Its most common scheduled departure was 20:39, used on 57 of 303 flights, with 20:03 (31 flights) next.
- Departs 20:3957 flights18.8%
- Departs 20:0331 flights10.2%
Scale runs 0% to 100%.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 20:39 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and F9 4462 runs 19 points worse at 50.7%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
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Against the route
F9 4462 next to PHL to SJU
Every carrier on PHL to SJU combined arrived on time 63.3% of the time across 1,992 flights, so F9 4462 is 13 points behind it. Frontier flew 915 flights on the same city pair under all its flight numbers, including this one, and those ran 55.6% on time. Across its whole network Frontier Airlines managed 72.7%, which this flight trails by 22 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| F9 4462thin sample | 303 | 50.7% | 75 min | 3.96% | F− |
| All Frontier Airlines on PHL–SJU | 915 | 55.6% | 77 min | 3.17% | D− |
| All carriers on PHL–SJU | 1,992 | 63.3% | 78 min | 3.36% | D− |
| Frontier Airlines, whole network | 213,022 | 72.7% | 84 min | 2.05% | C |
Across the year
F9 4462 quarter by quarter
F9 4462 did not run the same all year. Its best quarter was Apr–Jun 2026 at 61.9% on time and its weakest Jul–Sep 2026 at 13.6%, a swing of 48 points on roughly 76 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.
- Jul–Sep 202521 flights—
- Oct–Dec 202585 flights54.9%
- Jan–Mar 202665 flights58.3%
- Apr–Jun 202685 flights61.9%
- Jul–Sep 202647 flights13.6%
Scale runs 5% to 65%. Rows with fewer than 30 flights show a dash.
By weekday, F9 4462 did best on Wednesday at 66.7% on time and worst on Saturday at 34.9%. Each day rests on about 43 flights, so a gap of 32 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late F9 4462 runs when it is late
The 143 late arrivals split 37 under half an hour, 49 between 30 and 60 minutes, and 57 an hour or more.
- 15+ min early52 flights17.9%
- Within 15 min95 flights32.8%
- 15–29 min late37 flights12.8%
- 30–59 min late49 flights16.9%
- 1–2 hours late36 flights12.4%
- 2+ hours late21 flights7.2%
Scale runs 0% to 100%.
Share of 290 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 114 departures that left 15 minutes late or more, only 3 made it up before arrival. In the other direction, 32 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at SJU.
The worst days
Worst days for F9 4462
The latest arrival of the period was on 15 August 2026, 16 hours 48 minutes behind schedule; most of its delay minutes were filed as extreme weather. On three of the five worst days the largest share was filed as carrier-caused (crew, maintenance, fuelling, baggage).
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 15 August 2026 | 16 hours 48 minutes | Extreme weather |
| 1 May 2026 | 9 hours 5 minutes | Carrier |
| 10 August 2026 | 5 hours 24 minutes | Carrier |
| 21 July 2026 | 4 hours 33 minutes | Carrier |
| 31 May 2026 | 4 hours 22 minutes | Late-arriving aircraft |
Delay causes
Why F9 4462 runs late
Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 11,000 reported delay minutes.
- 35%Late-arriving aircraft
- 32%Carrier
- 23%National Airspace System
- 10%Extreme weather
35% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 11,000 reported delay minutes here, that single category outweighs weather by 3 to one. The split is drawn from 10,711 delay minutes reported on F9 4462.
Cancellations run at 3.96%, against 1.89% nationally. That is about one flight in 25 cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.
Connections and routes
What a delay on this flight costs
19.7% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
At 1,576 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.
Every one of the 303 flights under F9 4462 in the data flew PHL to SJU. The number was not reused on any other city pair, which makes this a clean record of one route.
One caution: this is a thin sample. 303 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
What to do with this
Booking F9 4462
For a booking, the cancellation rate is the figure to plan around on F9 4462: 3.96% of its 303 scheduled flights did not operate. A late arrival costs a little over an hour, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- PHL to SJU, every carrier and departure
- SJU to PHL, the return direction
- Frontier Airlines 1016 on the same route66.1%
- Philadelphia International (PHL) delay statistics
- Luis Munoz Marin International (SJU) delay statistics
- Frontier Airlines on-time record
- Every Frontier Airlines flight number with a record
- The most and least reliable flight numbers in the US
- Why the first flight of the morning is statistically safest
A flight number here means Frontier Airlines’s own number as it reports to the DOT. How the figures are computed is on the methodology page.
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.