Kansas City International in December 2025

72.7%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 December 2025, reporting carriers scheduled 3,969 domestic departures from Kansas City International (MCI). 72.7% left less than 15 minutes late and 73.4% reached their destination on time; 1.4% were cancelled.

Nationally that month, 72.0% of flights departed on time and 71.9% arrived on time, so MCI departures were 0.7 points above the national departure figure.

A year earlier, in December 2024, the airport had 3,962 departures with 81.6% leaving on time: a change of −8.9 points, with flights up 0%.

Flights arriving at MCI that month were on time 70.4% of the time (3,971 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 43%, air carrier 35% and national aviation system 19%.

On time 73.4%
Arrived 15+ minutes late 25.1%
Cancelled 1.4%
Diverted 0.1%

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

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

Measure	Dec 2025	Dec 2024	MCI, 12 months to Jul 2026	All reported flights, Dec 2025
Departed on time	72.7%	81.6%	77.8%	72.0%
Arrived on time	73.4%	84.5%	78.7%	71.9%
Cancelled	1.4%	0.4%	1.5%	1.5%
Average departure delay (late minutes only)	22.6 min	12.4 min	15.7 min	21.2 min
Scheduled departures a day	132	132	135	19,410
Scheduled departures	3,969	3,962	49,298	582,304

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
WN Southwest Airlines	1,942	49%	75.6%	9.4 min	0.7%
DL Delta Air Lines	619	16%	73.5%	22.7 min	2.9%
AA American Airlines	431	11%	72.4%	20.2 min	0.2%
UA United Airlines	212	5%	73.1%	18.1 min	0.9%
YX Republic Airline	192	5%	69.8%	13.8 min	1.6%
OO SkyWest Airlines	144	4%	64.6%	43.6 min	0.7%
MQ Envoy Air	118	3%	70.3%	4.6 min	5.1%
OH PSA Airlines	92	2%	62.0%	19.8 min	7.6%
AS Alaska Airlines	79	2%	75.9%	7.4 min	1.3%
NK Spirit Airlines	74	2%	67.6%	22.1 min	1.4%
F9 Frontier Airlines	44	1%	75.0%	13.0 min	2.3%
G4 Allegiant Air	22	1%	59.1%	16.5 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
MCI–DEN	Kansas City to Denver	337	72.1%	15.5 min	0.9%
MCI–ORD	Kansas City to Chicago	312	63.8%	29.5 min	1.9%
MCI–ATL	Kansas City to Atlanta	263	79.1%	14.4 min	2.3%
MCI–PHX	Kansas City to Phoenix	236	74.2%	15.7 min	0.8%
MCI–DFW	Kansas City to Dallas/Fort Worth	214	67.3%	18.0 min	0.5%
MCI–DAL	Kansas City to Dallas	179	78.8%	3.9 min	0.6%
MCI–LAS	Kansas City to Las Vegas	173	80.3%	5.8 min	0.0%
MCI–MDW	Kansas City to Chicago	165	77.6%	7.4 min	0.0%
MCI–DCA	Kansas City to Washington	163	77.9%	9.0 min	1.8%
MCI–MCO	Kansas City to Orlando	146	76.7%	12.0 min	1.4%
MCI–LGA	Kansas City to New York	141	56.0%	47.5 min	7.1%
MCI–BNA	Kansas City to Nashville	119	79.0%	10.1 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), December 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Dec 2025	Minutes
Air carrier	34.6%	33.3%	28,711
Late-arriving aircraft	42.9%	41.1%	35,507
National Aviation System	18.6%	19.1%	15,395
Extreme weather	3.7%	6.4%	3,069
Security	0.2%	0.2%	180

82,862 delay minutes on 998 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 December 2025?

72.7% of 3,969 scheduled domestic departures left less than 15 minutes late, and 73.4% reached their destination on time. The national figures that month were 72.0% and 71.9%.

How does that compare with a year earlier?

In December 2024, 81.6% of 3,962 departures left on time and 0.4% were cancelled, against 72.7% and 1.4% in December 2025.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for December 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.