Flight number record
F9 1165
Frontier Airlines · San Juan to Philadelphia
- Route
- SJU → PHL
- Departs
- 14:36
- Flights
- 323
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s F9 1165, check with Frontier Airlines.
F9 1165 draws a D. Roughly one flight in two arrives at least 15 minutes late, and the typical late arrival is a little over an hour behind schedule. Build slack into anything you connect to. That rests on 323 flights, with a median arrival 7 minutes late.
The national on-time rate over the same period is 77.3%, so F9 1165 runs 19 points behind the country as a whole. Across a thousand flights that is about 189 extra late arrivals.
Key figures
On time
58.4%
Arrivals under 15 minutes late, of 315 completed flights
Avg delay
68 min
Across delayed arrivals only, not all flights
Cancelled
1.86%
National rate is 1.89%
1 hour+ late
12.1%
National rate is 8.3%
These figures cover 323 flights between September 2025 and August 2026. Beyond the headline rate, 12.1% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When F9 1165 flies
F9 1165 flies SJU to PHL without a single fixed slot. Its most common scheduled departure was 14:36, used on 39 of 323 flights.
- Departs 14:3639 flights12.1%
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 14:36 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and F9 1165 runs 14 points worse at 58.4%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
F9 1165 next to SJU to PHL
Every carrier on SJU to PHL combined arrived on time 71.9% of the time across 1,992 flights, so F9 1165 is 14 points behind it. Frontier flew 916 flights on the same city pair under all its flight numbers, including this one, and those ran 63.3% on time. Across its whole network Frontier Airlines managed 72.7%, which this flight trails by 14 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| F9 1165thin sample | 323 | 58.4% | 68 min | 1.86% | D |
| All Frontier Airlines on SJU–PHL | 916 | 63.3% | 81 min | 3.17% | D− |
| All carriers on SJU–PHL | 1,992 | 71.9% | 85 min | 3.61% | C− |
| Frontier Airlines, whole network | 213,022 | 72.7% | 84 min | 2.05% | C |
Across the year
F9 1165 quarter by quarter
F9 1165 did not run the same all year. Its best quarter was Apr–Jun 2026 at 74.4% on time and its weakest Jul–Sep 2026 at 36.7%, a swing of 38 points on roughly 81 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 202528 flights—
- Oct–Dec 202581 flights63.3%
- Jan–Mar 202675 flights52.2%
- Apr–Jun 202690 flights74.4%
- Jul–Sep 202649 flights36.7%
Scale runs 30% to 80%. Rows with fewer than 30 flights show a dash.
By weekday, F9 1165 did best on Saturday at 68.1% on time and worst on Monday at 48.9%. Each day rests on about 46 flights, so a gap of 19 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late F9 1165 runs when it is late
The 131 late arrivals split 47 under half an hour, 46 between 30 and 60 minutes, and 38 an hour or more.
- 15+ min early58 flights18.4%
- Within 15 min126 flights40.0%
- 15–29 min late47 flights14.9%
- 30–59 min late46 flights14.6%
- 1–2 hours late23 flights7.3%
- 2+ hours late15 flights4.8%
Scale runs 0% to 100%.
Share of 315 completed flights by arrival against schedule.
23 of 117 late departures made up the time and arrived on time, 20% of them. In the other direction, 37 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 PHL.
The worst days
Worst days for F9 1165
The latest arrival of the period was on 4 January 2026, 13 hours 25 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 4 January 2026 | 13 hours 25 minutes | Carrier |
| 5 July 2026 | 11 hours 32 minutes | Late-arriving aircraft |
| 9 November 2025 | 6 hours 47 minutes | Carrier |
| 17 September 2025 | 5 hours 21 minutes | Carrier |
| 14 October 2025 | 3 hours 51 minutes | Carrier |
Delay causes
Why F9 1165 runs late
Late-arriving aircraft accounts for 50% of the 8,948 delay minutes carriers reported here, and the remaining four split what is left.
- 50%Late-arriving aircraft
- 35%Carrier
- 16%National Airspace System
50% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 8,948 reported delay minutes here, that single category outweighs weather by 50 to one. The split is drawn from 8,948 delay minutes reported on F9 1165.
Cancellations sit at 1.86% against a national 1.89%, which is ordinary. Diversions add another 0.62%.
Connections and routes
What a delay on this flight costs
12.1% 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 323 flights under F9 1165 in the data flew SJU to PHL. 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. 323 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 1165
For a booking, F9 1165 is a flight to put a long connection behind. 12.1% of its completed flights arrived an hour or more late, which a short layover will not absorb. If the onward flight is on a separate ticket, the risk sits with you.
Related
Where to go next
- SJU to PHL, every carrier and departure
- PHL to SJU, the return direction
- Frontier Airlines 1015 on the same route66.1%
- Luis Munoz Marin International (SJU) delay statistics
- Philadelphia International (PHL) 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.