Carrier route record
F9JAX→PHL
Frontier Airlines · Jacksonville to Philadelphia
- Flights
- 264
- Period
- July 2025 to June 2026
- Share of route
- 17%
- Carriers
- 4
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with Frontier Airlines.
Frontier on JAX to PHL sits in the middle of the pack with a C−. About seven flights in ten arrive on time by the DOT's definition, 5 points worse than the national rate of 77.6%. The late ones land a little over an hour behind schedule. That rests on 264 flights. The strongest carrier on the route with a full sample, American Airlines, flew 745 at 80.4% on time.
The national on-time rate over the same period is 77.6%, so Frontier on JAX to PHL runs 5 points behind the country as a whole. Across a thousand flights that is about 51 extra late arrivals.
Key figures
On time
72.5%
Arrivals under 15 minutes late, of 255 completed flights
Avg delay
76 min
Across delayed arrivals only, not all flights
Cancelled
3.41%
National rate is 1.81%
Whole route
78.5%
Every carrier on JAX to PHL, 1,553 flights
These figures cover 264 flights between July 2025 and June 2026. Beyond the headline rate, 13.3% 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.
Carrier by carrier
Frontier against every carrier on JAX to PHL
Frontier flew 264 of the 1,553 flights on JAX to PHL, about 17% of it. Its 72.5% on time is 6 points worse than the route as a whole, which runs 78.5%. Ranked by on-time rate it is last of four carriers on the route, where the range runs from Republic at 91.5% to Frontier at 72.5%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.
The two carriers here are closely matched: 4 points separate the best from the worst. At that spread, schedule and price are better tie-breakers than reliability. Sample sizes are shown so you can see which rows are worth weighing.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Republic Airwaysthin sample | 72 | 91.5% | 126 min | 1.39% | A |
| American Airlines | 745 | 80.4% | 106 min | 2.28% | B |
| PSA Airlines | 472 | 76.8% | 109 min | 5.08% | B− |
| Frontier Airlines (this page)thin sample | 264 | 72.5% | 76 min | 3.41% | C− |
PSA Airlines cancels 5.1% of what it schedules here, the highest in the table. A cancelled flight never appears in an on-time rate, so read that column alongside the punctuality one rather than after it.
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 11 points, against 4 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am—
- 8am–11am10 flights—
- 11am–2pm19 flights—
- 2pm–5pm82 flights64.2%
- 5pm–8pm5 flights—
- 8pm–5am148 flights75.2%
Scale runs 55% to 80%. Rows with fewer than 30 flights show a dash.
The 8pm–5am window is the strongest at 75.2% on time. The full set of windows spans 11 points.
Across the year
Frontier on JAX to PHL through the year
- Jul–Sep 202566 flights64.6%
- Oct–Dec 202569 flights76.5%
- Jan–Mar 202659 flights70.9%
- Apr–Jun 202670 flights77.6%
Scale runs 55% to 85%. 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 72.5% on time across 264 flights.
Frontier on JAX to PHL did not run the same all year. Its best quarter was Apr–Jun 2026 at 77.6% on time and its weakest Jul–Sep 2025 at 64.6%, a swing of 13 points on roughly 66 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 83.9% on time and Sunday the weakest at 66.7%. 17 points is a smaller lever than departure hour, but it is free.
Delay causes
Why Frontier runs late on this route
One category carries most of the weight here. Late-arriving aircraft accounts for 77% of the 5,307 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.
- 77%Late-arriving aircraft
- 16%National Airspace System
- 6%Carrier
- 1%Extreme weather
77% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 5,307 reported delay minutes here, that single category outweighs weather by 58 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 5,307 reported delay minutes.
Cancellations run at 3.41%, against 1.81% nationally. That is about one flight in 30 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
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 13.3% 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.
The 742 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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.
The return leg is a different operation and performs like one: it runs 68.9% on time across 265 flights, 4 points below 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. 264 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 JAX to PHL
Put together: the delay figures matter less here than the 3.41% cancellation rate. A late arrival costs you a little over an hour; a cancelled flight costs you the day. Book the 8pm–5am departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 255 completed flights over 12 months sit behind that.
Related
Where to go next
- JAX to PHL, every carrier
- Frontier on PHL to JAX, the return leg
- American Airlines on JAX to PHL80.4%
- PSA Airlines on JAX to PHL76.8%
- Frontier Airlines network-wide record
- 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.