Airport month record

MCIAUG

Kansas City International in August 2025

Departures: 4,113
Month: August 2025
National, same month: 77.4%
Carriers: 10

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

MCI in August lands a B+, 2 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 about an hour on average. That is a workable record, not a spotless one. That rests on 4,113 flights, of which Delta Air Lines flew 705 at 89.7% on time.

Delta Air Lines is the most reliable of the three carriers covered here at 89.7% on time across 705 flights.

On time

79.7%

Arrivals under 15 minutes late, of 4,061 completed departures

Avg delay

64 min

Across delayed arrivals only, not all flights

Cancelled

0.92%

Nationally in August: 1.08%

Whole year

79.6%

MCI across all twelve months

These figures cover 4,113 departures from Kansas City 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 MCI's other months

Against MCI's own year, August ran level with the twelve-month rate of 79.6%, which makes it number seven of twelve months, best first. Either side of it, July ran 73.2% on time and September 82.0%, so a trip moved by a few weeks would have landed in a worse stretch.

MCI month by month
Month	Flights	On time	Avg delay	Cancelled	Grade
July 2025	4,442	73.2%	79 min	1.96%	C
August 2025 (this page)	4,113	79.7%	64 min	0.92%	B+
September 2025	3,928	82.0%	58 min	0.33%	B+
October 2025	4,214	80.3%	58 min	0.33%	B+
November 2025	3,956	81.1%	72 min	1.82%	B
December 2025	3,969	74.5%	83 min	1.36%	C
January 2026	3,508	84.3%	81 min	3.39%	B−
February 2026	3,503	84.9%	69 min	1.48%	B
March 2026	4,227	79.3%	75 min	3.41%	B−
April 2026	4,184	81.9%	70 min	0.98%	B+
May 2026	4,354	79.5%	65 min	1.10%	B
June 2026	4,581	76.7%	73 min	1.24%	B

Departure window

The best time of day to leave MCI in August

Departure time matters more here than the choice of carrier. The gap between the best and worst window is 24 points, against 16 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.

5am–8am983 flights91.5%
8am–11am614 flights84.2%
11am–2pm689 flights79.8%
2pm–5pm952 flights75.9%
5pm–8pm738 flights67.1%
8pm–5am137 flights68.4%

Scale runs 60% to 95%. Rows with fewer than 30 flights show a dash.

Book the early departure. Flights leaving between 5am–8am arrive on time 91.5% of the time, against 67.1% for the evening window. That is 24 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 983 flights scheduled in it.

Across the week, Monday is the strongest day at 85.1% on time and Saturday the weakest at 72.2%. 13 points is a smaller lever than departure hour, but it is free.

Carrier by carrier

Which airlines ran best at MCI in August

The choice of carrier is not cosmetic here. Delta Air Lines arrives on time 89.7% of the time; American Airlines manages 73.6%. Sample sizes sit next to every figure, because a two-point gap across 469 flights means less than a ten-point one.

Carriers at MCI in August 2025
Airline	Flights	On time	Avg delay	Cancelled	Grade
Southwest Airlines	1,930	78.3%	46 min	0.36%	B+
Delta Air Lines	705	89.7%	57 min	0.85%	A+
American Airlines	469	73.6%	104 min	2.13%	C
United Airlinesthin sample	285	73.0%	66 min	1.05%	C
Envoy Airthin sample	185	73.9%	99 min	2.16%	C
Republic Airwaysthin sample	147	84.1%	90 min	1.36%	B
SkyWest Airlinesthin sample	120	84.2%	46 min	0.00%	B+
Alaska Airlinesthin sample	96	82.1%	69 min	1.04%	B
Spirit Airlinesthin sample	95	87.4%	55 min	0.00%	A+
PSA Airlinesthin sample	34	82.8%	28 min	14.71%	B−

The spread between Delta and American is 16 points, wide enough that it should decide the booking. On a hundred trips that is 16 more arrivals inside the on-time window.

Route by route

Busiest routes out of MCI in August

Routes from MCI in August 2025
Route	Flights	On time	Avg delay	Cancelled	Grade
MCI to DEN · Denver	369	65.7%	56 min	0.27%	C+
MCI to ORD · Chicagothin sample	313	78.2%	114 min	1.60%	B
MCI to ATL · Atlantathin sample	303	93.7%	64 min	0.66%	A+
MCI to DFW · Dallas-Fort Worththin sample	227	65.9%	103 min	3.52%	C−
MCI to MDW · Chicagothin sample	189	77.3%	45 min	2.12%	B
MCI to PHX · Phoenixthin sample	175	83.9%	81 min	0.00%	B+
MCI to LAS · Las Vegasthin sample	159	83.6%	38 min	0.00%	B+
MCI to DAL · Dallasthin sample	158	81.6%	56 min	0.00%	B+
MCI to DCA · Washingtonthin sample	143	74.8%	41 min	2.10%	C
MCI to LGA · New Yorkthin sample	139	84.1%	70 min	0.72%	B+
MCI to SEA · Seattlethin sample	121	80.8%	70 min	0.83%	B+
MCI to MCO · Orlandothin sample	118	75.2%	50 min	0.00%	B+
MCI to CLT · Charlottethin sample	117	77.4%	50 min	0.85%	B+
MCI to DTW · Detroitthin sample	116	89.7%	80 min	0.00%	A+
MCI to BNA · Nashvillethin sample	115	88.7%	48 min	0.00%	A+
MCI to LAX · Los Angelesthin sample	114	84.8%	30 min	1.75%	B
MCI to STL · St. Louisthin sample	92	85.9%	54 min	0.00%	A+
MCI to SLC · Salt Lake Citythin sample	91	91.1%	46 min	1.10%	A
MCI to PHL · Philadelphiathin sample	90	78.8%	46 min	5.56%	B−
MCI to MSP · Minneapolisthin sample	89	72.7%	48 min	0.00%	C+
MCI to BWI · Baltimorethin sample	89	89.7%	56 min	2.25%	A
MCI to HOU · Houstonthin sample	80	83.8%	37 min	0.00%	B+
MCI to AUS · Austinthin sample	69	85.5%	49 min	0.00%	A+
MCI to BOS · Bostonthin sample	56	85.5%	41 min	1.79%	A
MCI to EWR · Newarkthin sample	56	85.5%	164 min	1.79%	A

Delay causes

What held MCI 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 53,000 reported delay minutes.

Late-arriving aircraft
41%
National Airspace System
28%
Carrier
23%
Extreme weather
8%
Security
0%

41% 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 53,000 reported delay minutes here, that single category outweighs weather by 5 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 52,798 reported delay minutes.

Cancellations sit at 0.92% against a national 1.08%, which is ordinary. Diversions add another 0.34%.

5.6% 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 about an hour, which a normal layover absorbs.

What to do with this

Flying from MCI in August

For a August trip through MCI: expect 79.7% on time and 0.92% cancelled, going by August 2025. The 5am–8am window was the strongest part of the day.

Kansas City International (MCI), the whole year
MCI in July73.2%
MCI in September82.0%
MCI in October80.3%
MCI in November81.1%
MCI in December74.5%
MCI in January84.3%
MCI in February84.9%
MCI in March79.3%
MCI in April81.9%
MCI in May79.5%
MCI in June76.7%

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