Flight number record
F9 1003
Frontier Airlines · Philadelphia to Atlanta
- Route
- PHL → ATL
- Departs
- 19:10
- Flights
- 289
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s F9 1003, check with Frontier Airlines.
F9 1003 draws a C. About one flight in three 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 289 flights, with a median arrival 2 minutes late.
The national on-time rate over the same period is 77.6%, so F9 1003 runs 11 points behind the country as a whole. Across a thousand flights that is about 111 extra late arrivals.
Key figures
On time
66.5%
Arrivals under 15 minutes late, of 281 completed flights
Avg delay
69 min
Across delayed arrivals only, not all flights
Cancelled
2.77%
National rate is 1.81%
1 hour+ late
12.5%
National rate is 8.1%
These figures cover 289 flights between July 2025 and June 2026. Beyond the headline rate, 12.5% 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 1003 flies
F9 1003 flies PHL to ATL without a single fixed slot. Its most common scheduled departure was 19:10, used on 47 of 289 flights, with 13:02 (38 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 19:1047 flights16.3%
- Departs 13:0238 flights13.1%
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 19:10 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.2%, and F9 1003 runs level with that at 66.5%. 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 1003 next to PHL to ATL
Every carrier on PHL to ATL combined arrived on time 79.2% of the time across 5,713 flights, so F9 1003 is 13 points behind it. Frontier flew 1,008 flights on the same city pair under all its flight numbers, including this one, and those ran 66.4% on time. Across its whole network Frontier Airlines managed 73.2%, which this flight trails by 7 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| F9 1003thin sample | 289 | 66.5% | 69 min | 2.77% | C |
| All Frontier Airlines on PHL–ATL | 1,008 | 66.4% | 71 min | 2.78% | C |
| All carriers on PHL–ATL | 5,713 | 79.2% | 66 min | 2.73% | B |
| Frontier Airlines, whole network | 205,332 | 73.2% | 84 min | 1.85% | C |
Across the year
F9 1003 quarter by quarter
F9 1003 did not run the same all year. Its best quarter was Oct–Dec 2025 at 74.7% on time and its weakest Jan–Mar 2026 at 59.7%, a swing of 15 points on roughly 72 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 202573 flights67.1%
- Oct–Dec 202578 flights74.7%
- Jan–Mar 202671 flights59.7%
- Apr–Jun 202667 flights63.6%
Scale runs 50% to 80%. Rows with fewer than 30 flights show a dash.
By weekday, F9 1003 did best on Wednesday at 86.5% on time and worst on Sunday at 46.5%. Each day rests on about 41 flights, so a gap of 40 points is worth noticing but could still narrow in another year.
Delay causes
Why F9 1003 runs late
One category carries most of the weight here. Late-arriving aircraft accounts for 53% of the 6,479 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.
- 53%Late-arriving aircraft
- 23%National Airspace System
- 21%Carrier
- 3%Extreme weather
53% 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 6,479 reported delay minutes here, that single category outweighs weather by 15 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 6,479 delay minutes reported on F9 1003.
Cancellations run at 2.77%, against 1.81% nationally. That is roughly 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 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. 12.5% 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 666 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.
Every one of the 289 flights under F9 1003 in the data flew PHL to ATL. 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. 289 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 1003
For a booking, the cancellation rate is the figure to plan around on F9 1003: 2.77% of its 289 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 ATL, every carrier and departure
- ATL to PHL, the return direction
- Delta Air Lines 1152 on the same route89.9%
- Delta Air Lines 2270 on the same route88.2%
- Delta Air Lines 1180 on the same route88.0%
- Delta Air Lines 1269 on the same route91.4%
- Frontier Airlines 2551 on the same route70.6%
- Delta Air Lines 1169 on the same route75.4%
- Philadelphia International (PHL) delay statistics
- Hartsfield-Jackson Atlanta International (ATL) 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.