Airport month record

CVGAUG

Cincinnati/Northern Kentucky International in August 2025

Departures: 2,894
Month: August 2025
National, same month: 77.4%
Carriers: 11

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

CVG in August lands a B, 3 points better than the national rate of 77.4%. About one flight in five 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 2,894 flights, of which Delta Air Lines flew 693 at 85.4% on time.

On time

80.7%

Arrivals under 15 minutes late, of 2,844 completed departures

Avg delay

81 min

Across delayed arrivals only, not all flights

Cancelled

1.11%

Nationally in August: 1.08%

Whole year

78.8%

CVG across all twelve months

These figures cover 2,894 departures from Cincinnati/Northern Kentucky International in August 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

August next to CVG's other months

Against CVG's own year, August ran 2 points better than the twelve-month rate of 78.8%, which makes it number six of twelve months, best first. Cancellations were unusually low for CVG in August, at 1.11% against 1.91% across the year. Either side of it, July ran 71.5% on time and September 85.4%, 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 (this page)	2,894	80.7%	81 min	1.11%	B
September 2025	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 August

Departure time matters more here than the choice of carrier. The gap between the best and worst window is 28 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–8am829 flights91.1%
8am–11am373 flights84.9%
11am–2pm534 flights83.0%
2pm–5pm539 flights74.5%
5pm–8pm545 flights68.1%
8pm–5am74 flights63.0%

Scale runs 55% to 95%. Rows with fewer than 30 flights show a dash.

The 8pm–5am window is where this operation falls apart: 63.0% on time, against 91.1% for the 5am–8am slot. By evening the aircraft flying these rotations have absorbed a full day of small delays and there is no slack left to recover in. The 5am–8am window is the busiest, with 829 flights scheduled in it.

Across the week, Wednesday is the strongest day at 84.2% on time and Friday the weakest at 78.9%. 5 points is a smaller lever than departure hour, but it is free.

Carrier by carrier

Which airlines ran best at CVG in August

The two carriers here are closely matched: half a point separate the best from the worst. At that spread, schedule and price are better tie-breakers than reliability. Sample sizes are shown so you can see which rows are worth weighing.

Carriers at CVG in August 2025
Airline	Flights	On time	Avg delay	Cancelled	Grade
Delta Air Lines	693	85.4%	67 min	0.29%	A+
Republic Airways	483	85.4%	82 min	1.66%	A
Allegiant Airthin sample	326	80.0%	88 min	0.00%	B+
American Airlinesthin sample	301	68.2%	84 min	1.99%	C
Frontier Airlinesthin sample	255	86.1%	93 min	1.18%	A
PSA Airlinesthin sample	195	75.0%	89 min	3.59%	B−
United Airlinesthin sample	190	78.0%	91 min	2.11%	B
Envoy Airthin sample	177	81.8%	69 min	0.56%	B+
Southwest Airlinesthin sample	169	83.8%	57 min	0.00%	B+
SkyWest Airlinesthin sample	55	66.0%	141 min	1.82%	C
Alaska Airlinesthin sample	50	56.0%	55 min	0.00%	D+

No carrier stands out. Delta tops the table at 85.4%, half a point clear of the bottom, which is inside the range this kind of sample moves year to year.

Route by route

Busiest routes out of CVG in August

Routes from CVG in August 2025
Route	Flights	On time	Avg delay	Cancelled	Grade
CVG to ORD · Chicago	408	76.8%	97 min	2.45%	B
CVG to ATL · Atlantathin sample	279	88.3%	76 min	1.08%	A
CVG to DFW · Dallas-Fort Worththin sample	150	68.3%	64 min	4.00%	C−
CVG to CLT · Charlottethin sample	146	73.8%	150 min	0.68%	C+
CVG to BOS · Bostonthin sample	140	89.1%	102 min	0.71%	A+
CVG to DEN · Denverthin sample	135	79.8%	110 min	1.48%	B
CVG to MCO · Orlandothin sample	125	73.2%	60 min	0.00%	C+
CVG to MSP · Minneapolisthin sample	113	82.3%	50 min	0.00%	B+
CVG to DCA · Washingtonthin sample	84	66.7%	44 min	3.57%	C−
CVG to PHL · Philadelphiathin sample	81	77.2%	70 min	2.47%	B
CVG to SEA · Seattlethin sample	81	72.8%	55 min	0.00%	C+
CVG to FLL · Fort Lauderdalethin sample	76	77.3%	50 min	0.00%	B+
CVG to LGA · New Yorkthin sample	73	80.6%	62 min	1.37%	B
CVG to MIA · Miamithin sample	73	79.5%	63 min	0.00%	B+
CVG to SLC · Salt Lake Citythin sample	68	82.4%	106 min	0.00%	B+
CVG to JFK · New Yorkthin sample	63	92.1%	75 min	0.00%	A+
CVG to BWI · Baltimorethin sample	62	83.9%	59 min	0.00%	B+
CVG to TPA · Tampathin sample	60	88.1%	61 min	0.00%	A+
CVG to LAS · Las Vegasthin sample	58	86.2%	50 min	0.00%	A+
CVG to IAD · Washingtonthin sample	54	92.5%	25 min	1.85%	A
CVG to VPS · Valparaisothin sample	51	86.3%	81 min	0.00%	A+
CVG to IAH · Houstonthin sample	50	84.0%	81 min	0.00%	B+
CVG to RSW · Fort Myersthin sample	48	95.8%	36 min	0.00%	A+
CVG to PHX · Phoenixthin sample	42	90.0%	90 min	2.38%	A
CVG to MDW · Chicagothin sample	40	94.9%	60 min	0.00%	A+

Delay causes

What held CVG up in August

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 44,000 reported delay minutes.

Late-arriving aircraft
38%
Carrier
33%
National Airspace System
20%
Extreme weather
9%
Security
0%

38% 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 44,000 reported delay minutes here, that single category outweighs weather by 4 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 44,404 reported delay minutes.

Cancellations sit at 1.11% against a national 1.08%, which is ordinary. Diversions add another 0.62%.

7.1% of arrivals land an hour or more late, close to the national 8.2%. 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 CVG in August

For a August trip through CVG: expect 80.7% on time and 1.11% cancelled, going by August 2025. The 5am–8am window was the strongest part of the day.

Cincinnati/Northern Kentucky International (CVG), the whole year
CVG in July71.5%
CVG in September85.4%
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