Airport month record

CVGSEP

Cincinnati/Northern Kentucky International in September 2025

Departures: 2,613
Month: September 2025
National, same month: 83.4%
Carriers: 11

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

CVG in September earns an A+. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 2 points better than the national rate of 83.4%. When something does go wrong the average delay runs a little over an hour. That rests on 2,613 flights, with a median arrival 9 minutes early.

On time

85.4%

Arrivals under 15 minutes late, of 2,594 completed departures

Avg delay

69 min

Across delayed arrivals only, not all flights

Cancelled

0.61%

Nationally in September: 0.51%

Whole year

78.8%

CVG across all twelve months

These figures cover 2,613 departures from Cincinnati/Northern Kentucky 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 CVG's other months

Against CVG's own year, September ran 7 points better than the twelve-month rate of 78.8%, which makes it the best of the twelve months in the data. Cancellations were unusually low for CVG in September, at 0.61% against 1.91% across the year. Either side of it, August ran 80.7% on time and October 81.2%, so a trip moved by a few weeks would have landed in a worse stretch.

CVG month by month
Month	Flights	On time	Avg delay	Cancelled	Grade
July 2025	3,077	71.5%	94 min	2.73%	C
August 2025	2,894	80.7%	81 min	1.11%	B
September 2025 (this page)	2,613	85.4%	69 min	0.61%	A+
October 2025	2,941	81.2%	61 min	0.48%	B+
November 2025	2,713	82.7%	86 min	2.69%	B
December 2025	2,710	67.7%	84 min	1.70%	C
January 2026	2,380	80.3%	81 min	6.26%	B−
February 2026	2,270	77.8%	70 min	1.45%	B
March 2026	3,105	75.4%	90 min	2.80%	B
April 2026	2,835	83.6%	85 min	1.02%	B
May 2026	3,064	82.4%	66 min	1.01%	B
June 2026	3,129	77.7%	83 min	1.57%	B

Departure window

The best time of day to leave CVG in September

Departure time matters more here than the choice of carrier. The gap between the best and worst window is 16 points, against half a point between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.

5am–8am701 flights91.2%
8am–11am423 flights92.1%
11am–2pm407 flights87.9%
2pm–5pm544 flights79.4%
5pm–8pm478 flights76.3%
8pm–5am60 flights77.6%

Scale runs 70% to 100%. Rows with fewer than 30 flights show a dash.

Book the morning departure. Flights leaving between 8am–11am arrive on time 92.1% of the time, against 76.3% for the evening window. That is 16 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 701 flights scheduled in it.

Across the week, Tuesday is the strongest day at 87.5% on time and Thursday the weakest at 82.7%. 5 points is a smaller lever than departure hour, but it is free.

Carrier by carrier

Which airlines ran best at CVG in September

Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.

Carriers at CVG in September 2025
Airline	Flights	On time	Avg delay	Cancelled	Grade
Delta Air Lines	676	92.5%	69 min	0.00%	A+
Republic Airwaysthin sample	361	85.0%	56 min	1.94%	A
American Airlinesthin sample	281	74.5%	80 min	1.42%	C
United Airlinesthin sample	237	82.2%	73 min	0.42%	B+
Frontier Airlinesthin sample	226	92.9%	48 min	0.00%	A+
Allegiant Airthin sample	219	88.1%	65 min	0.00%	A+
PSA Airlinesthin sample	181	83.8%	151 min	1.10%	B
Southwest Airlinesthin sample	158	89.2%	41 min	0.00%	A+
Envoy Airthin sample	152	72.2%	53 min	0.00%	C+
SkyWest Airlinesthin sample	92	65.6%	43 min	2.17%	C
Alaska Airlinesthin sample	30	90.0%	44 min	0.00%	A+

Route by route

Busiest routes out of CVG in September

Routes from CVG in September 2025
Route	Flights	On time	Avg delay	Cancelled	Grade
CVG to ORD · Chicago	402	73.2%	53 min	0.75%	C+
CVG to ATL · Atlantathin sample	264	96.6%	52 min	0.00%	A+
CVG to BOS · Bostonthin sample	150	73.8%	58 min	3.33%	C−
CVG to DFW · Dallas-Fort Worththin sample	143	77.9%	74 min	2.10%	B
CVG to CLT · Charlottethin sample	138	86.8%	97 min	0.72%	A+
CVG to DEN · Denverthin sample	132	87.1%	59 min	0.00%	A+
CVG to MSP · Minneapolisthin sample	107	92.5%	29 min	0.00%	A+
CVG to MCO · Orlandothin sample	105	92.4%	84 min	0.00%	A+
CVG to DCA · Washingtonthin sample	81	78.5%	146 min	2.47%	B
CVG to IAH · Houstonthin sample	66	86.4%	97 min	0.00%	A+
CVG to PHL · Philadelphiathin sample	65	75.4%	159 min	0.00%	B+
CVG to BWI · Baltimorethin sample	60	88.3%	39 min	0.00%	A+
CVG to JFK · New Yorkthin sample	60	94.9%	78 min	1.67%	A
CVG to SEA · Seattlethin sample	60	95.0%	44 min	0.00%	A+
CVG to MIA · Miamithin sample	60	72.9%	50 min	0.00%	C+
CVG to FLL · Fort Lauderdalethin sample	56	89.3%	41 min	0.00%	A+
CVG to LAS · Las Vegasthin sample	55	92.7%	85 min	0.00%	A+
CVG to SLC · Salt Lake Citythin sample	55	85.5%	53 min	0.00%	A+
CVG to TPA · Tampathin sample	51	90.2%	89 min	0.00%	A+
CVG to IAD · Washingtonthin sample	50	92.0%	64 min	0.00%	A+
CVG to RSW · Fort Myersthin sample	46	93.5%	162 min	0.00%	A+
CVG to LGA · New Yorkthin sample	43	93.0%	77 min	0.00%	A+
CVG to MDW · Chicagothin sample	38	89.5%	17 min	0.00%	A+
CVG to PHX · Phoenixthin sample	38	86.5%	64 min	0.00%	A+
CVG to VPS · Valparaisothin sample	35	88.6%	71 min	0.00%	A+

Delay causes

What held CVG up in September

One category carries most of the weight here. Carrier accounts for 44% of the 26,000 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.

Carrier
44%
National Airspace System
28%
Late-arriving aircraft
28%
Extreme weather
1%
Security
0%

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 11,000 of the 26,000 delay minutes reported here. The split is drawn from 26,335 reported delay minutes.

Cancellations are rare at 0.61%, 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.

Badly late arrivals are rare here: only 4.9% land an hour or more behind schedule, against 5.4% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.

What to do with this

Flying from CVG in September

For a September trip through CVG: this is one of the better months to be flying from here, 85.4% on time with 0.61% cancelled. That is a base rate for the month as a whole; a single storm can still spoil a particular day.

Cincinnati/Northern Kentucky International (CVG), the whole year
CVG in July71.5%
CVG in August80.7%
CVG in October81.2%
CVG in November82.7%
CVG in December67.7%
CVG in January80.3%
CVG in February77.8%
CVG in March75.4%
CVG in April83.6%
CVG in May82.4%
CVG in June77.7%

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