Airport month record

FLLSEP

Fort Lauderdale-Hollywood International in September 2025

Departures: 5,663
Month: September 2025
National, same month: 83.4%
Carriers: 9

Historical statistics for September 2025, not live status or a forecast for this year’s September. For today’s conditions at FLL, see live FAA status.

FLL in September lands a B+, level with the national rate of 83.4%. About one flight in six arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That is a workable record, not a spotless one. That rests on 5,663 flights, of which United Airlines flew 467 at 87.2% on time.

United Airlines is the most reliable of the six carriers covered here at 87.2% on time across 467 flights.

On time

82.8%

Arrivals under 15 minutes late, of 5,623 completed departures

Avg delay

75 min

Across delayed arrivals only, not all flights

Cancelled

0.42%

Nationally in September: 0.51%

Whole year

71.5%

FLL across all twelve months

These figures cover 5,663 departures from Fort Lauderdale-Hollywood International in September 2025. On time means an arrival less than 15 minutes after the scheduled gate time, the DOT's threshold, and the national comparison uses every US departure in the same month rather than the whole year.

Against the year

September next to FLL's other months

Against FLL's own year, September ran 11 points better than the twelve-month rate of 71.5%, which makes it the best of the twelve months in the data. Cancellations were unusually low for FLL in September, at 0.42% against 2.22% across the year. Either side of it, August ran 74.6% on time and October 80.3%, so a trip moved by a few weeks would have landed in a worse stretch.

FLL month by month
Month	Flights	On time	Avg delay	Cancelled	Grade
July 2025	6,944	71.4%	88 min	2.23%	C
August 2025	6,561	74.6%	73 min	0.55%	C+
September 2025 (this page)	5,663	82.8%	75 min	0.42%	B+
October 2025	6,591	80.3%	65 min	0.39%	B+
November 2025	7,609	77.6%	72 min	2.42%	B
December 2025	8,886	64.9%	71 min	2.07%	D
January 2026	8,607	71.1%	67 min	4.76%	C−
February 2026	8,251	67.3%	67 min	3.95%	C−
March 2026	9,928	59.7%	83 min	4.66%	D−
April 2026	8,610	69.0%	65 min	1.06%	C
May 2026	6,437	74.9%	61 min	0.53%	C+
June 2026	6,077	74.3%	76 min	1.14%	C

Departure window

The best time of day to leave FLL in September

Departure time matters more here than the choice of carrier. The gap between the best and worst window is 25 points, against 7 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.

5am–8am1,116 flights93.2%
8am–11am814 flights93.0%
11am–2pm999 flights85.2%
2pm–5pm866 flights68.3%
5pm–8pm938 flights77.5%
8pm–5am930 flights77.6%

Scale runs 60% to 100%. Rows with fewer than 30 flights show a dash.

Book the early departure. Flights leaving between 5am–8am arrive on time 93.2% of the time, against 68.3% for the afternoon window. That is 25 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 5am–8am window is the busiest, with 1,116 flights scheduled in it.

Across the week, Saturday is the strongest day at 89.6% on time and Friday the weakest at 78.2%. 11 points is a smaller lever than departure hour, but it is free.

Carrier by carrier

Which airlines ran best at FLL in September

The choice of carrier is not cosmetic here. United Airlines arrives on time 87.2% of the time; Spirit Airlines manages 80.3%. Sample sizes sit next to every figure, because a two-point gap across 1,807 flights means less than a ten-point one.

Carriers at FLL in September 2025
Airline	Flights	On time	Avg delay	Cancelled	Grade
Spirit Airlines	1,807	80.3%	75 min	0.55%	B+
JetBlue Airways	1,077	82.0%	69 min	0.19%	B+
Delta Air Lines	865	83.5%	93 min	0.46%	B+
Southwest Airlines	768	84.7%	52 min	0.26%	B+
United Airlines	467	87.2%	73 min	0.00%	A+
American Airlines	412	82.5%	92 min	1.46%	B
Allegiant Airthin sample	142	87.9%	115 min	0.00%	A+
Frontier Airlinesthin sample	95	92.6%	95 min	0.00%	A+
Alaska Airlinesthin sample	30	70.0%	47 min	0.00%	C+

United leads Spirit by 7 points. Real, but small enough that a better departure time on the weaker carrier can outweigh it.

Route by route

Busiest routes out of FLL in September

Routes from FLL in September 2025
Route	Flights	On time	Avg delay	Cancelled	Grade
FLL to ATL · Atlanta	453	83.4%	93 min	0.00%	B+
FLL to LGA · New Yorkthin sample	311	81.9%	58 min	0.32%	B+
FLL to EWR · Newarkthin sample	291	76.0%	79 min	0.69%	B+
FLL to JFK · New Yorkthin sample	258	85.2%	90 min	0.00%	A+
FLL to BWI · Baltimorethin sample	236	87.7%	59 min	0.42%	A+
FLL to BOS · Bostonthin sample	232	69.3%	87 min	1.72%	C
FLL to CLT · Charlottethin sample	227	85.8%	96 min	0.44%	A+
FLL to PHL · Philadelphiathin sample	213	84.4%	83 min	0.47%	B+
FLL to ORD · Chicagothin sample	206	84.9%	81 min	0.49%	B+
FLL to DFW · Dallas-Fort Worththin sample	204	72.0%	81 min	2.45%	C
FLL to IAH · Houstonthin sample	195	85.1%	65 min	0.00%	A+
FLL to DTW · Detroitthin sample	167	87.4%	82 min	0.00%	A+
FLL to BNA · Nashvillethin sample	160	86.8%	70 min	0.62%	A+
FLL to LAX · Los Angelesthin sample	159	89.3%	63 min	0.00%	A+
FLL to DCA · Washingtonthin sample	144	79.7%	100 min	0.00%	B+
FLL to SJU · San Juanthin sample	121	81.0%	63 min	0.00%	B+
FLL to MCO · Orlandothin sample	120	90.8%	41 min	0.00%	A+
FLL to TPA · Tampathin sample	107	82.9%	76 min	0.93%	B+
FLL to MSY · New Orleansthin sample	97	79.2%	50 min	1.03%	B
FLL to DEN · Denverthin sample	88	81.8%	53 min	0.00%	B+
FLL to RDU · Raleighthin sample	81	80.2%	71 min	0.00%	B+
FLL to MDW · Chicagothin sample	81	82.5%	35 min	1.23%	B
FLL to IND · Indianapolisthin sample	79	79.7%	71 min	0.00%	B+
FLL to PIT · Pittsburghthin sample	74	75.7%	91 min	0.00%	B+
FLL to CMH · Columbusthin sample	67	77.3%	60 min	0.00%	B+

Delay causes

What held FLL up in September

Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 72,000 reported delay minutes.

Carrier
33%
Late-arriving aircraft
29%
National Airspace System
21%
Extreme weather
17%
Security
0%

Extreme weather accounts for 17% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the comparison with the other months below is the more useful view of the risk. The national share is 6%, so this operation carries roughly 3.0 times the usual weather exposure. The split is drawn from 72,446 reported delay minutes.

Cancellations are rare at 0.42%, below the national 0.51% 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.

7.1% of arrivals land an hour or more late, close to the national 5.4%. 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 a little over an hour, which a normal layover absorbs.

What to do with this

Flying from FLL in September

For a September trip through FLL: this is one of the better months to be flying from here, 82.8% on time with 0.42% cancelled. That is a base rate for the month as a whole; a single storm can still spoil a particular day.

Fort Lauderdale-Hollywood International (FLL), the whole year
FLL in July71.4%
FLL in August74.6%
FLL in October80.3%
FLL in November77.6%
FLL in December64.9%
FLL in January71.1%
FLL in February67.3%
FLL in March59.7%
FLL in April69.0%
FLL in May74.9%
FLL in June74.3%

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