Flight number record
F9 4347
Frontier Airlines · New York to Atlanta
- Route
- LGA → ATL
- Departs
- 11:30
- Flights
- 294
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s F9 4347, check with Frontier Airlines.
F9 4347 draws a D−. Roughly one flight in three arrives at least 15 minutes late, and the typical late arrival is about 2.3 hours behind schedule. Build slack into anything you connect to. That rests on 294 flights, with a median arrival 3 minutes late.
The national on-time rate over the same period is 77.6%, so F9 4347 runs 16 points behind the country as a whole. Across a thousand flights that is about 156 extra late arrivals.
Key figures
On time
62.0%
Arrivals under 15 minutes late, of 279 completed flights
Avg delay
136 min
Across delayed arrivals only, not all flights
Cancelled
4.76%
National rate is 1.81%
1 hour+ late
21.1%
National rate is 8.1%
These figures cover 294 flights between July 2025 and June 2026. Beyond the headline rate, 21.1% 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 4347 flies
F9 4347 flies LGA to ATL without a single fixed slot. Its most common scheduled departure was 11:30, used on 116 of 294 flights, with 22:00 (69 flights) and 12:30 (57 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 11:30116 flights39.5%
- Departs 22:0069 flights23.5%
- Departs 12:3057 flights19.4%
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 11:30 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.8%, and F9 4347 runs 17 points worse at 62.0%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
Against the route
F9 4347 next to LGA to ATL
Every carrier on LGA to ATL combined arrived on time 76.6% of the time across 8,343 flights, so F9 4347 is 15 points behind it. Frontier flew 889 flights on the same city pair under all its flight numbers, including this one, and those ran 58.4% on time. Across its whole network Frontier Airlines managed 73.2%, which this flight trails by 11 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| F9 4347thin sample | 294 | 62.0% | 136 min | 4.76% | D− |
| All Frontier Airlines on LGA–ATL | 889 | 58.4% | 106 min | 5.74% | D− |
| All carriers on LGA–ATL | 8,343 | 76.6% | 78 min | 3.67% | B− |
| Frontier Airlines, whole network | 205,332 | 73.2% | 84 min | 1.85% | C |
Across the year
F9 4347 quarter by quarter
F9 4347 did not run the same all year. Its best quarter was Jul–Sep 2025 at 68.5% on time and its weakest Jan–Mar 2026 at 54.7%, a swing of 14 points on roughly 74 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 202591 flights68.5%
- Oct–Dec 202574 flights62.0%
- Jan–Mar 202658 flights54.7%
- Apr–Jun 202671 flights59.1%
Scale runs 45% to 75%. Rows with fewer than 30 flights show a dash.
By weekday, F9 4347 ranged from 54.1% on Monday to 65.9% on Friday. With about 42 flights behind each day, a spread of 12 points is inside normal variation, so the day you fly is not worth changing for this flight.
Delay causes
Why F9 4347 runs late
One category carries most of the weight here. Late-arriving aircraft accounts for 75% of the 14,000 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.
- 75%Late-arriving aircraft
- 15%National Airspace System
- 10%Carrier
75% 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 14,000 reported delay minutes here, that single category outweighs weather by 75 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 14,370 delay minutes reported on F9 4347.
Cancellations run at 4.76%, against 1.81% nationally. That is about one flight in twenty 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. 21.1% 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 762 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 294 flights under F9 4347 in the data flew LGA 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. 294 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 4347
For a booking, the cancellation rate is the figure to plan around on F9 4347: 4.76% of its 294 scheduled flights did not operate. A late arrival costs about 2.3 hours, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- LGA to ATL, every carrier and departure
- ATL to LGA, the return direction
- Frontier Airlines 3287 on the same route62.7%
- Delta Air Lines 550 on the same route89.8%
- Delta Air Lines 992 on the same route86.8%
- Delta Air Lines 968 on the same route74.3%
- Delta Air Lines 342 on the same route93.1%
- Delta Air Lines 993 on the same route84.0%
- LaGuardia (LGA) 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.