Flight number record
F9 4731
Frontier Airlines · New York to Atlanta
- Route
- JFK → ATL
- Departs
- 13:00
- Flights
- 259
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 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 259 flights, with a median arrival 1 minute late.
The national on-time rate over the same period is 77.6%, so F9 4731 runs 10 points behind the country as a whole. Across a thousand flights that is about 101 extra late arrivals.
Key figures
On time
67.5%
Arrivals under 15 minutes late, of 255 completed flights
Avg delay
86 min
Across delayed arrivals only, not all flights
Cancelled
1.54%
National rate is 1.81%
1 hour+ late
10.2%
National rate is 8.1%
These figures cover 259 flights between July 2025 and June 2026. Beyond the headline rate, 10.2% 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 4731 flies
F9 4731 flies JFK to ATL without a single fixed slot. Its most common scheduled departure was 13:00, used on 144 of 259 flights, with 13:01 (54 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 13:00144 flights55.6%
- Departs 13:0154 flights20.8%
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 13:00 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.8%, and F9 4731 runs 11 points worse at 67.5%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
Against the route
F9 4731 next to JFK to ATL
Every carrier on JFK to ATL combined arrived on time 76.7% of the time across 4,272 flights, so F9 4731 is 9 points behind it. Frontier flew 737 flights on the same city pair under all its flight numbers, including this one, and those ran 70.5% on time. Across its whole network Frontier Airlines managed 73.2%, which this flight trails by 6 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| F9 4731thin sample | 259 | 67.5% | 86 min | 1.54% | C |
| All Frontier Airlines on JFK–ATL | 737 | 70.5% | 74 min | 2.17% | C |
| All carriers on JFK–ATL | 4,272 | 76.7% | 77 min | 2.25% | B |
| Frontier Airlines, whole network | 205,332 | 73.2% | 84 min | 1.85% | 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 65 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 202543 flights69.8%
- Oct–Dec 202545 flights50.0%
- Jan–Mar 202680 flights65.4%
- Apr–Jun 202691 flights76.7%
Scale runs 40% to 80%. Rows with fewer than 30 flights show a dash.
By weekday, F9 4731 did best on Wednesday at 82.9% on time and worst on Sunday at 62.2%. Each day rests on about 37 flights, so a gap of 21 points is worth noticing but could still narrow in another year.
Delay causes
Why F9 4731 runs late
One category carries most of the weight here. Late-arriving aircraft accounts for 54% of the 7,112 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.
- 54%Late-arriving aircraft
- 25%Carrier
- 20%National Airspace System
- 1%Extreme weather
54% 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 7,112 reported delay minutes here, that single category outweighs weather by 52 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 7,112 delay minutes reported on F9 4731.
Cancellations sit at 1.54% against a national 1.81%, which is ordinary. Diversions add another 0.00%.
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. 10.2% 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 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. 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 259 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. 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 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 route89.5%
- Delta Air Lines 2342 on the same route89.7%
- Delta Air Lines 2293 on the same route75.9%
- Delta Air Lines 2227 on the same route85.9%
- Delta Air Lines 2190 on the same route74.9%
- JetBlue Airways 519 on the same route74.6%
- 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.