Flight number record
F9 4462
Frontier Airlines · Philadelphia to San Juan
- Route
- PHL → SJU
- Departs
- 20:39
- Flights
- 313
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 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 53.7% of flights arrive inside the 15-minute window, 24 points worse than the national rate of 77.6%. Late arrivals average a little over an hour. Treat any tight connection here as a coin flip. That rests on 313 flights, with a median arrival 12 minutes late.
The national on-time rate over the same period is 77.6%, so F9 4462 runs 24 points behind the country as a whole. Across a thousand flights that is about 239 extra late arrivals.
Key figures
On time
53.7%
Arrivals under 15 minutes late, of 298 completed flights
Avg delay
70 min
Across delayed arrivals only, not all flights
Cancelled
4.47%
National rate is 1.81%
1 hour+ late
18.1%
National rate is 8.1%
These figures cover 313 flights between July 2025 and June 2026. Beyond the headline rate, 18.1% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.
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 313 flights, with 20:05 (48 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 20:3957 flights18.2%
- Departs 20:0548 flights15.3%
Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.
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 70.5%, and F9 4462 runs 17 points worse at 53.7%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
Against the route
F9 4462 next to PHL to SJU
Every carrier on PHL to SJU combined arrived on time 63.1% of the time across 1,879 flights, so F9 4462 is 9 points behind it. Frontier flew 865 flights on the same city pair under all its flight numbers, including this one, and those ran 57.9% on time. Across its whole network Frontier Airlines managed 73.2%, which this flight trails by 20 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| F9 4462thin sample | 313 | 53.7% | 70 min | 4.47% | F− |
| All Frontier Airlines on PHL–SJU | 865 | 57.9% | 75 min | 3.35% | D− |
| All carriers on PHL–SJU | 1,879 | 63.1% | 83 min | 3.19% | D− |
| Frontier Airlines, whole network | 205,332 | 73.2% | 84 min | 1.85% | 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 2025 at 38.9%, a swing of 23 points on roughly 78 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 202578 flights38.9%
- Oct–Dec 202585 flights54.9%
- Jan–Mar 202665 flights58.3%
- Apr–Jun 202685 flights61.9%
Scale runs 30% 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 Monday at 43.2%. Each day rests on about 45 flights, so a gap of 24 points is worth noticing but could still narrow in another year.
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 9,694 reported delay minutes.
- 37%Carrier
- 32%National Airspace System
- 28%Late-arriving aircraft
- 2%Extreme weather
The largest share of delay minutes, 37%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 3,633 of the 9,694 delay minutes reported here. The split is drawn from 9,694 delay minutes reported on F9 4462.
Cancellations run at 4.47%, against 1.81% nationally. That is roughly one flight in twenty 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
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 18.1% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum 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 313 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. 313 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: 4.47% of its 313 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 route65.7%
- 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
- How often a connection fails at the major US hubs
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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.