Flight number record
F9 4731
Frontier Airlines · New York to Atlanta
- Route
- JFK → ATL
- Departs
- 13:00
- Flights
- 307
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s F9 4731, check with Frontier Airlines.
F9 4731 draws a C. About one flight in three arrives at least 15 minutes late, and the typical late arrival is an hour and a half behind schedule. Build slack into anything you connect to. That rests on 307 flights, with a median arrival 1 minute early.
The national on-time rate over the same period is 77.3%, so F9 4731 runs 11 points behind the country as a whole. Across a thousand flights that is about 112 extra late arrivals.
Key figures
On time
66.1%
Arrivals under 15 minutes late, of 301 completed flights
Avg delay
93 min
Across delayed arrivals only, not all flights
Cancelled
1.95%
National rate is 1.89%
1 hour+ late
11.6%
National rate is 8.3%
These figures cover 307 flights between September 2025 and August 2026. Beyond the headline rate, 11.6% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When F9 4731 flies
F9 4731 flies JFK to ATL without a single fixed slot. Its most common scheduled departure was 13:00, used on 191 of 307 flights, with 13:01 (54 flights) next.
- Departs 13:00191 flights62.2%
- Departs 13:0154 flights17.6%
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 13:00 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and F9 4731 runs 12 points worse at 66.1%. 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 4731 next to JFK to ATL
Every carrier on JFK to ATL combined arrived on time 75.5% of the time across 4,227 flights, so F9 4731 is 9 points behind it. Frontier flew 661 flights on the same city pair under all its flight numbers, including this one, and those ran 68.6% on time. Across its whole network Frontier Airlines managed 72.7%, which this flight trails by 7 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| F9 4731thin sample | 307 | 66.1% | 93 min | 1.95% | C |
| All Frontier Airlines on JFK–ATL | 661 | 68.6% | 82 min | 2.27% | C |
| All carriers on JFK–ATL | 4,227 | 75.5% | 83 min | 2.77% | B |
| Frontier Airlines, whole network | 213,022 | 72.7% | 84 min | 2.05% | C |
Across the year
F9 4731 quarter by quarter
F9 4731 did not run the same all year. Its best quarter was Apr–Jun 2026 at 76.7% on time and its weakest Oct–Dec 2025 at 50.0%, a swing of 27 points on roughly 61 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 202530 flights66.7%
- Oct–Dec 202545 flights50.0%
- Jan–Mar 202680 flights65.4%
- Apr–Jun 202691 flights76.7%
- Jul–Sep 202661 flights62.7%
Scale runs 40% to 80%.
By weekday, F9 4731 did best on Wednesday at 81.0% on time and worst on Monday at 57.1%. Each day rests on about 44 flights, so a gap of 24 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late F9 4731 runs when it is late
F9 4731 often beats the schedule: 85 of 301 completed flights, 28%, arrived 15 minutes or more early. The 102 late arrivals split 31 under half an hour, 36 between 30 and 60 minutes, and 35 an hour or more.
- 15+ min early85 flights28.2%
- Within 15 min114 flights37.9%
- 15–29 min late31 flights10.3%
- 30–59 min late36 flights12.0%
- 1–2 hours late23 flights7.6%
- 2+ hours late12 flights4.0%
Scale runs 0% to 100%.
Share of 301 completed flights by arrival against schedule.
17 of 83 late departures made up the time and arrived on time, 20% of them. In the other direction, 36 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 ATL.
The worst days
Worst days for F9 4731
The latest arrival of the period was on 21 July 2026, 21 hours 44 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 21 July 2026 | 21 hours 44 minutes | Late-arriving aircraft |
| 20 January 2026 | 17 hours 57 minutes | Carrier |
| 18 June 2026 | 11 hours 23 minutes | Late-arriving aircraft |
| 22 September 2025 | 10 hours 30 minutes | Late-arriving aircraft |
| 20 October 2025 | 5 hours 47 minutes | Carrier |
Delay causes
Why F9 4731 runs late
Late-arriving aircraft accounts for 58% of the 9,447 delay minutes carriers reported here, and the remaining four split what is left.
- 58%Late-arriving aircraft
- 21%Carrier
- 19%National Airspace System
- 2%Extreme weather
58% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 9,447 reported delay minutes here, that single category outweighs weather by 30 to one. The split is drawn from 9,447 delay minutes reported on F9 4731.
Cancellations sit at 1.95% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
11.6% 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 760 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 307 flights under F9 4731 in the data flew JFK 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. 307 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 4731
For a booking, F9 4731 is one of the weaker ways to fly JFK to ATL: 9 points below the route as a whole. If the schedule allows, compare it with the other departures listed on the route page before settling on this one.
Related
Where to go next
- JFK to ATL, every carrier and departure
- ATL to JFK, the return direction
- Delta Air Lines 2286 on the same route90.2%
- Delta Air Lines 2342 on the same route86.1%
- Delta Air Lines 2227 on the same route83.4%
- Delta Air Lines 2293 on the same route76.3%
- JetBlue Airways 519 on the same route75.9%
- JetBlue Airways 719 on the same route58.8%
- John F. Kennedy International (JFK) 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, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.