Flight number record
F9 4406
Frontier Airlines · Atlanta to Miami
- Route
- ATL → MIA
- Departs
- 11:47
- Flights
- 349
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s F9 4406, check with Frontier Airlines.
F9 4406 sits in the middle of the pack with a C+. About seven flights in ten arrive on time by the DOT's definition, 5 points worse than the national rate of 77.3%. The late ones land a little over an hour behind schedule. That rests on 349 flights, with a median arrival 2 minutes early.
The national on-time rate over the same period is 77.3%, so F9 4406 runs 5 points behind the country as a whole. Across a thousand flights that is about 48 extra late arrivals.
Key figures
On time
72.5%
Arrivals under 15 minutes late, of 345 completed flights
Avg delay
78 min
Across delayed arrivals only, not all flights
Cancelled
0.86%
National rate is 1.89%
1 hour+ late
10.7%
National rate is 8.3%
These figures cover 349 flights between September 2025 and August 2026. Beyond the headline rate, 10.7% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When F9 4406 flies
F9 4406 flies ATL to MIA without a single fixed slot. Its most common scheduled departure was 11:47, used on 66 of 349 flights, with 11:20 (35 flights) next.
- Departs 11:4766 flights18.9%
- Departs 11:2035 flights10.0%
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 11:47 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and F9 4406 runs 6 points worse at 72.5%. 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 4406 next to ATL to MIA
Every carrier on ATL to MIA combined arrived on time 71.2% of the time across 6,280 flights, so F9 4406 is about level with it. Frontier flew 937 flights on the same city pair under all its flight numbers, including this one, and those ran 63.4% on time. Across its whole network Frontier Airlines managed 72.7%, close to this flight's figure.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| F9 4406thin sample | 349 | 72.5% | 78 min | 0.86% | C+ |
| All Frontier Airlines on ATL–MIA | 937 | 63.4% | 96 min | 1.60% | D |
| All carriers on ATL–MIA | 6,280 | 71.2% | 73 min | 1.61% | C |
| Frontier Airlines, whole network | 213,022 | 72.7% | 84 min | 2.05% | C |
Across the year
F9 4406 quarter by quarter
F9 4406 did not run the same all year. Its best quarter was Oct–Dec 2025 at 77.6% on time and its weakest Jul–Sep 2026 at 62.3%, a swing of 15 points on roughly 87 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 202523 flights—
- Oct–Dec 202588 flights77.6%
- Jan–Mar 202690 flights68.9%
- Apr–Jun 202686 flights73.3%
- Jul–Sep 202662 flights62.3%
Scale runs 55% to 85%. Rows with fewer than 30 flights show a dash.
By weekday, F9 4406 did best on Wednesday at 80.4% on time and worst on Saturday at 64.6%. Each day rests on about 50 flights, so a gap of 16 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late F9 4406 runs when it is late
F9 4406 often beats the schedule: 89 of 345 completed flights, 26%, arrived 15 minutes or more early. The 95 late arrivals split 26 under half an hour, 32 between 30 and 60 minutes, and 37 an hour or more.
- 15+ min early89 flights25.8%
- Within 15 min161 flights46.7%
- 15–29 min late26 flights7.5%
- 30–59 min late32 flights9.3%
- 1–2 hours late21 flights6.1%
- 2+ hours late16 flights4.6%
Scale runs 0% to 100%.
Share of 345 completed flights by arrival against schedule.
30 of 108 late departures made up the time and arrived on time, 28% of them. 17 flights left on time and still arrived late.
The worst days
Worst days for F9 4406
The latest arrival of the period was on 9 February 2026, 9 hours 35 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. On three of the five worst days the largest share was filed as carrier-caused (crew, maintenance, fuelling, baggage).
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 9 February 2026 | 9 hours 35 minutes | Late-arriving aircraft |
| 15 February 2026 | 8 hours 14 minutes | Late-arriving aircraft |
| 15 June 2026 | 5 hours 22 minutes | Carrier |
| 24 November 2025 | 5 hours 13 minutes | Carrier |
| 10 November 2025 | 4 hours 27 minutes | Carrier |
Delay causes
Why F9 4406 runs late
Late-arriving aircraft accounts for 45% of the 7,395 delay minutes carriers reported here, and the remaining four split what is left.
- 45%Late-arriving aircraft
- 36%Carrier
- 20%National Airspace System
- 0%Extreme weather
45% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 7,395 reported delay minutes here, that single category outweighs weather by 45 to one. The split is drawn from 7,395 delay minutes reported on F9 4406.
Cancellations are rare at 0.86%, below the national 1.89% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.
Connections and routes
What a delay on this flight costs
10.7% 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 594 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 349 flights under F9 4406 in the data flew ATL to MIA. 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. 349 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 4406
For a booking, read F9 4406 as 72.5% on time with 0.86% cancelled over 349 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- ATL to MIA, every carrier and departure
- MIA to ATL, the return direction
- Delta Air Lines 1510 on the same route83.7%
- Delta Air Lines 1332 on the same route82.2%
- Delta Air Lines 1588 on the same route64.2%
- Delta Air Lines 1323 on the same route62.4%
- Delta Air Lines 1579 on the same route75.3%
- Delta Air Lines 2836 on the same route89.8%
- Hartsfield-Jackson Atlanta International (ATL) delay statistics
- Miami International (MIA) 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.