Kalamazoo/Battle Creek International in August 2025

82.6%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 172 domestic departures from Kalamazoo/Battle Creek International (AZO). 82.6% left less than 15 minutes late and 79.1% reached their destination on time; 1.2% were cancelled.

Nationally that month, 76.8% of flights departed on time and 76.3% arrived on time, so AZO departures were 5.8 points above the national departure figure.

A year earlier, in August 2024, the airport had 83 departures with 73.5% leaving on time: a change of +9.1 points, with flights up 107%.

Flights arriving at AZO that month were on time 76.7% of the time (172 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 72%, national aviation system 15% and late-arriving aircraft 13%.

On time 79.1%
Arrived 15+ minutes late 19.8%
Cancelled 1.2%
Diverted 0.0%

Every scheduled departure from AZO 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	AZO, 12 months to Jul 2026	All reported flights, Aug 2025
Departed on time	82.6%	73.5%	77.6%	76.8%
Arrived on time	79.1%	75.9%	75.6%	76.3%
Cancelled	1.2%	2.4%	3.4%	1.1%
Average departure delay (late minutes only)	14.2 min	25.2 min	22.0 min	17.6 min
Scheduled departures a day	6	3	6	20,079
Scheduled departures	172	83	1,991	602,378

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
OO SkyWest Airlines	87	51%	72.4%	13.6 min	0.0%
MQ Envoy Air	85	49%	85.9%	-7.3 min	2.4%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
AZO–DTW	Kalamazoo to Detroit	87	72.4%	13.6 min	0.0%
AZO–ORD	Kalamazoo to Chicago	85	85.9%	-7.3 min	2.4%

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), August 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Aug 2025	Minutes
Air carrier	72.2%	33.1%	1,805
Late-arriving aircraft	12.5%	40.5%	312
National Aviation System	15.3%	19.2%	383
Extreme weather	0.0%	7.0%	1
Security	0.0%	0.1%	0

2,501 delay minutes on 34 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 August 2025?

82.6% of 172 scheduled domestic departures left less than 15 minutes late, and 79.1% 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, 73.5% of 83 departures left on time and 2.4% were cancelled, against 82.6% and 1.2% 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 AZO · methodology · corrections.