Flight number record

F9 1809

Frontier Airlines · New York to Miami

Route: JFK → MIA
Departs: 06:00
Flights: 274
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s F9 1809, check with Frontier Airlines.

F9 1809 lands a B, 2 points better than the national rate of 77.6%. About one flight in five arrives 15 minutes late or worse, and those flights are late by close to two hours on average. That is a workable record, not a spotless one. That rests on 274 flights, with a median arrival 9 minutes early.

On time

79.4%

Arrivals under 15 minutes late, of 267 completed flights

Avg delay

112 min

Across delayed arrivals only, not all flights

Cancelled

2.55%

National rate is 1.81%

1 hour+ late

8.2%

National rate is 8.1%

These figures cover 274 flights between July 2025 and June 2026. Beyond the headline rate, 8.2% 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 1809 flies

F9 1809 flies JFK to MIA without a single fixed slot. Its most common scheduled departure was 06:00, used on 94 of 274 flights, with 11:30 (62 flights) and 10:02 (45 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 06:0094 flights34.3%
Departs 11:3062 flights22.6%
Departs 10:0245 flights16.4%

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 06:00 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and F9 1809 runs 10 points worse at 79.4%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Against the route

F9 1809 next to JFK to MIA

Every carrier on JFK to MIA combined arrived on time 77.3% of the time across 4,553 flights, so F9 1809 is 2 points ahead of it. Across its whole network Frontier Airlines managed 73.2%, which this flight beats by 6 points.

F9 1809 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
F9 1809thin sample	274	79.4%	112 min	2.55%	B
All Frontier Airlines on JFK–MIAthin sample	274	79.4%	112 min	2.55%	B
All carriers on JFK–MIA	4,553	77.3%	93 min	2.88%	B
Frontier Airlines, whole network	205,332	73.2%	84 min	1.85%	C

Across the year

F9 1809 quarter by quarter

F9 1809 did not run the same all year. Its best quarter was Oct–Dec 2025 at 85.9% on time and its weakest Jul–Sep 2025 at 74.2%, a swing of 12 points on roughly 91 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 flights74.2%
Oct–Dec 202588 flights85.9%
Jan–Mar 202682 flights78.8%
Apr–Jun 202613 flights—

Scale runs 65% to 90%. Rows with fewer than 30 flights show a dash.

By weekday, F9 1809 ranged from 73.7% on Sunday to 85.0% on Friday. With about 39 flights behind each day, a spread of 11 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why F9 1809 runs late

One category carries most of the weight here. Carrier accounts for 44% of the 6,139 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.

Carrier
44%
Late-arriving aircraft
32%
National Airspace System
23%
Extreme weather
1%

The largest share of delay minutes, 44%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 2,682 of the 6,139 delay minutes reported here. The split is drawn from 6,139 delay minutes reported on F9 1809.

Cancellations run at 2.55%, against 1.81% nationally. That is about one flight in 40 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

8.2% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last close to two hours, which a normal layover absorbs.

The 1,089 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 274 flights under F9 1809 in the data flew JFK 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. 274 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 1809

For a booking, the cancellation rate is the figure to plan around on F9 1809: 2.55% of its 274 scheduled flights did not operate. A late arrival costs close to two hours, but a cancellation costs the day, so leave a later option open.

Where to go next

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.

Key figures