Kansas City International in August 2025

80.5%departed on time

BTS: A flight is counted as on time if it arrived less than 15 minutes after its scheduled time. Only carriers with at least 0.5 percent of domestic scheduled passenger revenue report.

In August 2025, reporting carriers scheduled 4,113 domestic departures from Kansas City International (MCI). 80.5% left less than 15 minutes late and 78.7% reached their destination on time; 0.9% were cancelled.

Nationally that month, 76.8% of flights departed on time and 76.3% arrived on time, so MCI departures were 3.7 points above the national departure figure.

A year earlier, in August 2024, the airport had 4,371 departures with 81.9% leaving on time: a change of −1.4 points, with flights down 6%.

Flights arriving at MCI that month were on time 75.9% of the time (4,111 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 41%, national aviation system 28% and air carrier 23%.

On time 78.7%
Arrived 15+ minutes late 20.1%
Cancelled 0.9%
Diverted 0.3%

Every scheduled departure from MCI in August 2025, judged by arrival at the destination.

August 2025 against a year earlier, the airport's year and the nation

Measure	Aug 2025	Aug 2024	MCI, 12 months to Jul 2026	All reported flights, Aug 2025
Departed on time	80.5%	81.9%	77.8%	76.8%
Arrived on time	78.7%	81.1%	78.7%	76.3%
Cancelled	0.9%	1.5%	1.5%	1.1%
Average departure delay (late minutes only)	13.6 min	12.4 min	15.7 min	17.6 min
Scheduled departures a day	137	146	135	20,079
Scheduled departures	4,113	4,371	49,298	602,378

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
WN Southwest Airlines	1,930	47%	77.8%	6.2 min	0.4%
DL Delta Air Lines	705	17%	88.7%	-5.1 min	0.9%
AA American Airlines	469	11%	71.2%	21.1 min	2.1%
UA United Airlines	285	7%	71.9%	14.1 min	1.1%
MQ Envoy Air	185	4%	71.9%	22.7 min	2.2%
YX Republic Airline	147	4%	83.0%	4.5 min	1.4%
OO SkyWest Airlines	120	3%	84.2%	1.1 min	0.0%
AS Alaska Airlines	96	2%	81.3%	6.5 min	1.0%
NK Spirit Airlines	95	2%	87.4%	-0.7 min	0.0%
OH PSA Airlines	34	1%	70.6%	-3.8 min	14.7%
F9 Frontier Airlines	26	1%	65.4%	30.3 min	0.0%
G4 Allegiant Air	21	1%	61.9%	64.2 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
MCI–DEN	Kansas City to Denver	369	64.8%	16.2 min	0.3%
MCI–ORD	Kansas City to Chicago	313	77.0%	20.0 min	1.6%
MCI–ATL	Kansas City to Atlanta	303	92.7%	-8.4 min	0.7%
MCI–DFW	Kansas City to Dallas/Fort Worth	227	63.0%	32.1 min	3.5%
MCI–MDW	Kansas City to Chicago	189	75.7%	6.9 min	2.1%
MCI–PHX	Kansas City to Phoenix	175	83.4%	6.0 min	0.0%
MCI–LAS	Kansas City to Las Vegas	159	83.6%	1.3 min	0.0%
MCI–DAL	Kansas City to Dallas	158	81.6%	5.6 min	0.0%
MCI–DCA	Kansas City to Washington	143	72.7%	7.1 min	2.1%
MCI–LGA	Kansas City to New York	139	83.5%	4.1 min	0.7%
MCI–SEA	Kansas City to Seattle	121	80.2%	6.5 min	0.8%
MCI–MCO	Kansas City to Orlando	118	74.6%	9.7 min	0.0%

By scheduled departure hour

On-time share:under 62%6270768288% and over

Share of departures that left less than 15 minutes late, by scheduled hour (local time), August 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Aug 2025	Minutes
Air carrier	23.2%	33.1%	12,254
Late-arriving aircraft	40.8%	40.5%	21,559
National Aviation System	27.8%	19.2%	14,688
Extreme weather	8.1%	7.0%	4,284
Security	0.0%	0.1%	13

52,798 delay minutes on 825 flights that arrived 15 or more minutes late and carried a cause report. Carriers assign the categories; see what each category means.

Questions and answers

How many flights left MCI on time in August 2025?

80.5% of 4,113 scheduled domestic departures left less than 15 minutes late, and 78.7% reached their destination on time. The national figures that month were 76.8% and 76.3%.

How does that compare with a year earlier?

In August 2024, 81.9% of 4,371 departures left on time and 1.5% were cancelled, against 80.5% and 0.9% in August 2025.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for August 2025; public domain. Domestic scheduled flights by reporting carriers, totals and averages only. The site's data runs through July 2026. Full record for MCI · methodology · corrections.