Kalamazoo/Battle Creek International in September 2025

89.5%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 September 2025, reporting carriers scheduled 171 domestic departures from Kalamazoo/Battle Creek International (AZO). 89.5% left less than 15 minutes late and 90.1% reached their destination on time; 0.6% were cancelled.

Nationally that month, 83.1% of flights departed on time and 82.8% arrived on time, so AZO departures were 6.4 points above the national departure figure.

A year earlier, in September 2024, the airport had 80 departures with 88.8% leaving on time: a change of +0.7 points, with flights up 114%.

Flights arriving at AZO that month were on time 88.3% of the time (171 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 34%, extreme weather 27% and national aviation system 26%.

On time 90.1%
Arrived 15+ minutes late 9.4%
Cancelled 0.6%
Diverted 0.0%

Every scheduled departure from AZO in September 2025, judged by arrival at the destination.

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

Measure	Sep 2025	Sep 2024	AZO, 12 months to Jul 2026	All reported flights, Sep 2025
Departed on time	89.5%	88.8%	77.6%	83.1%
Arrived on time	90.1%	86.3%	75.6%	82.8%
Cancelled	0.6%	0.0%	3.4%	0.5%
Average departure delay (late minutes only)	6.6 min	12.6 min	22.0 min	12.2 min
Scheduled departures a day	6	3	6	18,748
Scheduled departures	171	80	1,991	562,439

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
MQ Envoy Air	86	50%	89.5%	-8.0 min	1.2%
OO SkyWest Airlines	85	50%	90.6%	-7.7 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
AZO–ORD	Kalamazoo to Chicago	86	89.5%	-8.0 min	1.2%
AZO–DTW	Kalamazoo to Detroit	85	90.6%	-7.7 min	0.0%

By scheduled departure hour

100

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

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

Delay causes

BTS cause category	Share of delay minutes	National, Sep 2025	Minutes
Air carrier	13.0%	34.3%	152
Late-arriving aircraft	34.1%	37.4%	399
National Aviation System	26.1%	22.6%	306
Extreme weather	26.8%	5.6%	314
Security	0.0%	0.1%	0

1,171 delay minutes on 16 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 AZO on time in September 2025?

89.5% of 171 scheduled domestic departures left less than 15 minutes late, and 90.1% reached their destination on time. The national figures that month were 83.1% and 82.8%.

How does that compare with a year earlier?

In September 2024, 88.8% of 80 departures left on time and 0.0% were cancelled, against 89.5% and 0.6% in September 2025.

Provenance

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