Carrier route record
F9PBI→PHL
Frontier Airlines · West Palm Beach to Philadelphia
- Flights
- 259
- Period
- September 2025 to August 2026
- Share of route
- 18%
- Carriers
- 3
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with Frontier Airlines.
Frontier on PBI to PHL draws a D. Roughly one flight in two arrives at least 15 minutes late, and the typical late arrival is close to two hours behind schedule. Build slack into anything you connect to. That rests on 259 flights, with a median arrival 4 minutes late.
The national on-time rate over the same period is 77.3%, so Frontier on PBI to PHL runs 19 points behind the country as a whole. Across a thousand flights that is about 186 extra late arrivals.
Key figures
On time
58.7%
Arrivals under 15 minutes late, of 252 completed flights
Avg delay
107 min
Across delayed arrivals only, not all flights
Cancelled
2.70%
National rate is 1.89%
Whole route
78.0%
Every carrier on PBI to PHL, 1,450 flights
These figures cover 259 flights between September 2025 and August 2026. Beyond the headline rate, 19.4% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
Fare search by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Carrier by carrier
Frontier against every carrier on PBI to PHL
Frontier flew 259 of the 1,450 flights on PBI to PHL, about 18% of it. Its 58.7% on time is 19 points worse than the route as a whole, which runs 78.0%. Ranked by on-time rate it is last of three carriers on the route, where the range runs from American at 82.3% to Frontier at 58.7%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.
Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| American Airlines | 1,177 | 82.3% | 116 min | 2.29% | B |
| Republic Airwaysthin sample | 14 | 64.3% | 103 min | 0.00% | D+ |
| Frontier Airlines (this page)thin sample | 259 | 58.7% | 107 min | 2.70% | D |
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Departure window
When Frontier runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 23 points, against half a point between the best and worst carrier.
- 5am–8am—
- 8am–11am72 flights70.4%
- 11am–2pm40 flights61.5%
- 2pm–5pm51 flights47.9%
- 5pm–8pm16 flights—
- 8pm–5am80 flights57.7%
Scale runs 40% to 75%. Rows with fewer than 30 flights show a dash.
Book the morning departure. Flights leaving between 8am–11am arrive on time 70.4% of the time, against 47.9% for the afternoon window. That is 23 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 8pm–5am window is the busiest, with 80 flights scheduled in it.
Across the year
Frontier on PBI to PHL through the year
- Jul–Sep 20251 flights—
- Oct–Dec 202565 flights70.3%
- Jan–Mar 202698 flights56.8%
- Apr–Jun 202679 flights57.1%
- Jul–Sep 202616 flights—
Scale runs 50% to 75%. Rows with fewer than 30 flights show a dash.
Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 58.7% on time across 259 flights.
Frontier on PBI to PHL did not run the same all year. Its best quarter was Oct–Dec 2025 at 70.3% on time and its weakest Jan–Mar 2026 at 56.8%, a swing of 14 points on roughly 86 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.
Across the week, Saturday is the strongest day at 68.6% on time and Friday the weakest at 48.9%, a spread of 20 points.
Arrival by arrival
How late Frontier on PBI to PHL runs when it is late
The 104 late arrivals split 22 under half an hour, 33 between 30 and 60 minutes, and 49 an hour or more.
- 15+ min early53 flights21.0%
- Within 15 min95 flights37.7%
- 15–29 min late22 flights8.7%
- 30–59 min late33 flights13.1%
- 1–2 hours late21 flights8.3%
- 2+ hours late28 flights11.1%
Scale runs 0% to 100%.
Share of 252 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 108 departures that left 15 minutes late or more, only 10 made it up before arrival. 6 flights left on time and still arrived late.
The worst days
Worst days for Frontier on PBI to PHL
The latest arrival of the period was on 27 July 2026, 12 hours 35 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 27 July 2026 | 12 hours 35 minutes | Carrier |
| 7 December 2025 | 11 hours 16 minutes | Late-arriving aircraft |
| 7 April 2026 | 8 hours 18 minutes | Carrier |
| 24 February 2026 | 5 hours 30 minutes | Carrier |
| 16 March 2026 | 5 hours 24 minutes | Late-arriving aircraft |
Delay causes
Why Frontier runs late on this route
Late-arriving aircraft accounts for 59% of the 11,000 delay minutes carriers reported here, and the remaining four split what is left.
- 59%Late-arriving aircraft
- 29%Carrier
- 10%National Airspace System
- 2%Extreme weather
59% 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 24 to one. The split is drawn from 11,082 reported delay minutes.
The practical consequence: the 8am–11am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 70.4% on time here.
Cancellations run at 2.70%, against 1.89% nationally. That is about one flight in 40 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 stage length
What a delay here costs
19.4% 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.
The 951 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty.
The return leg is a different operation and performs like one: it runs 62.9% on time across 259 flights, 4 points above this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 4 points of difference.
One caution: this is a thin sample. 259 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 Frontier on PBI to PHL
Put together: treat all of this as provisional. 259 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 58.7% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 252 completed flights over 12 months sit behind that.
Related
Where to go next
- PBI to PHL, every carrier
- Frontier on PHL to PBI, the return leg
- American Airlines on PBI to PHL82.3%
- Frontier Airlines network-wide record
- Palm Beach International (PBI) delay statistics
- Philadelphia International (PHL) delay statistics
- The US routes with the most cancellations
- Why the first flight of the morning is statistically safest
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.