Flight number record
F9 4173
Frontier Airlines · Philadelphia to Orlando
- Route
- PHL → MCO
- Departs
- 12:46
- Flights
- 273
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s F9 4173, check with Frontier Airlines.
F9 4173 draws a D. Roughly one flight in three 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 273 flights, with a median arrival 4 minutes late.
The national on-time rate over the same period is 77.3%, so F9 4173 runs 16 points behind the country as a whole. Across a thousand flights that is about 159 extra late arrivals.
Key figures
On time
61.4%
Arrivals under 15 minutes late, of 267 completed flights
Avg delay
102 min
Across delayed arrivals only, not all flights
Cancelled
1.47%
National rate is 1.89%
1 hour+ late
17.2%
National rate is 8.3%
These figures cover 273 flights between September 2025 and August 2026. Beyond the headline rate, 17.2% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When F9 4173 flies
F9 4173 flies PHL to MCO without a single fixed slot. Its most common scheduled departure was 12:46, used on 36 of 273 flights.
- Departs 12:4636 flights13.2%
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 12:46 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and F9 4173 runs 17 points worse at 61.4%. 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 4173 next to PHL to MCO
Every carrier on PHL to MCO combined arrived on time 72.4% of the time across 5,338 flights, so F9 4173 is 11 points behind it. Frontier flew 1,622 flights on the same city pair under all its flight numbers, including this one, and those ran 67.8% on time. Across its whole network Frontier Airlines managed 72.7%, which this flight trails by 11 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| F9 4173thin sample | 273 | 61.4% | 102 min | 1.47% | D |
| All Frontier Airlines on PHL–MCO | 1,622 | 67.8% | 107 min | 2.59% | C |
| All carriers on PHL–MCO | 5,338 | 72.4% | 84 min | 2.68% | C |
| Frontier Airlines, whole network | 213,022 | 72.7% | 84 min | 2.05% | C |
Across the year
F9 4173 quarter by quarter
F9 4173 did not run the same all year. Its best quarter was Oct–Dec 2025 at 67.9% on time and its weakest Jul–Sep 2026 at 44.8%, a swing of 23 points on roughly 68 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.
- Oct–Dec 202556 flights67.9%
- Jan–Mar 202669 flights62.3%
- Apr–Jun 202686 flights67.9%
- Jul–Sep 202662 flights44.8%
Scale runs 35% to 75%.
By weekday, F9 4173 did best on Wednesday at 82.4% on time and worst on Sunday at 47.2%. Each day rests on about 39 flights, so a gap of 35 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late F9 4173 runs when it is late
The 103 late arrivals split 28 under half an hour, 29 between 30 and 60 minutes, and 46 an hour or more.
- 15+ min early62 flights23.2%
- Within 15 min102 flights38.2%
- 15–29 min late28 flights10.5%
- 30–59 min late29 flights10.9%
- 1–2 hours late20 flights7.5%
- 2+ hours late26 flights9.7%
Scale runs 0% to 100%.
Share of 267 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 96 departures that left 15 minutes late or more, only 11 made it up before arrival. In the other direction, 18 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 MCO.
The worst days
Worst days for F9 4173
The latest arrival of the period was on 27 August 2026, 21 hours 7 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. Three of the five worst days fell in August 2026.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 27 August 2026 | 21 hours 7 minutes | Late-arriving aircraft |
| 20 February 2026 | 10 hours 22 minutes | Late-arriving aircraft |
| 1 August 2026 | 7 hours 23 minutes | Late-arriving aircraft |
| 5 August 2026 | 6 hours 31 minutes | Carrier |
| 7 December 2025 | 5 hours 47 minutes | National Airspace System |
Delay causes
Why F9 4173 runs late
Late-arriving aircraft accounts for 58% of the 10,000 delay minutes carriers reported here, and the remaining four split what is left.
- 58%Late-arriving aircraft
- 26%Carrier
- 16%National Airspace System
- 0%Extreme weather
58% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 10,000 reported delay minutes here, that single category outweighs weather by 58 to one. The split is drawn from 10,458 delay minutes reported on F9 4173.
Cancellations sit at 1.47% against a national 1.89%, which is ordinary. Diversions add another 0.73%.
Connections and routes
What a delay on this flight costs
17.2% 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 862 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.
Every one of the 273 flights under F9 4173 in the data flew PHL to MCO. 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. 273 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 4173
For a booking, F9 4173 is a flight to put a long connection behind. 17.2% 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
- PHL to MCO, every carrier and departure
- MCO to PHL, the return direction
- Frontier Airlines 1807 on the same route76.6%
- Philadelphia International (PHL) delay statistics
- Orlando International (MCO) 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.