Ellison Onizuka Kona International at Keahole in July 2025

84.8%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 July 2025, reporting carriers scheduled 1,382 domestic departures from Ellison Onizuka Kona International at Keahole (KOA). 84.8% left less than 15 minutes late and 85.3% reached their destination on time; 1.0% were cancelled.

Nationally that month, 69.7% of flights departed on time and 69.0% arrived on time, so KOA departures were 15.1 points above the national departure figure.

A year earlier, in July 2024, the airport had 1,463 departures with 87.1% leaving on time: a change of −2.3 points, with flights down 6%.

Flights arriving at KOA that month were on time 78.7% of the time (1,382 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 56%, air carrier 30% and extreme weather 10%.

On time 85.3%
Arrived 15+ minutes late 13.6%
Cancelled 1.0%
Diverted 0.1%

Every scheduled departure from KOA in July 2025, judged by arrival at the destination.

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

Measure	Jul 2025	Jul 2024	KOA, 12 months to Jul 2026	All reported flights, Jul 2025
Departed on time	84.8%	87.1%	85.7%	69.7%
Arrived on time	85.3%	86.6%	84.7%	69.0%
Cancelled	1.0%	1.2%	1.1%	2.5%
Average departure delay (late minutes only)	11.0 min	11.2 min	8.7 min	24.3 min
Scheduled departures a day	46	49	44	21,048
Scheduled departures	1,382	1,463	16,052	631,428

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
HA Hawaiian Airlines	629	46%	85.7%	3.5 min	0.2%
WN Southwest Airlines	251	18%	90.4%	-5.9 min	1.6%
AS Alaska Airlines	216	16%	73.1%	11.0 min	0.9%
UA United Airlines	162	12%	91.4%	-6.1 min	1.9%
AA American Airlines	62	4%	80.6%	51.0 min	3.2%
DL Delta Air Lines	62	4%	91.9%	-10.5 min	3.2%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
KOA–HNL	Kona to Honolulu	642	86.1%	2.4 min	0.6%
KOA–LAX	Kona to Los Angeles	166	85.5%	4.4 min	1.8%
KOA–OGG	Kona to Kahului	124	83.9%	4.9 min	0.0%
KOA–SEA	Kona to Seattle	123	87.8%	-1.5 min	2.4%
KOA–SFO	Kona to San Francisco	84	86.9%	5.3 min	0.0%
KOA–SMF	Kona to Sacramento	44	93.2%	-8.0 min	0.0%
KOA–DEN	Kona to Denver	31	90.3%	-12.7 min	3.2%
KOA–LAS	Kona to Las Vegas	31	96.8%	-26.0 min	3.2%
KOA–LIH	Kona to Lihue	31	96.8%	-2.9 min	0.0%
KOA–PDX	Kona to Portland	31	38.7%	33.4 min	0.0%
KOA–PHX	Kona to Phoenix	31	87.1%	51.8 min	6.5%
KOA–SAN	Kona to San Diego	31	74.2%	10.1 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), July 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Jul 2025	Minutes
Air carrier	29.8%	31.1%	3,772
Late-arriving aircraft	56.1%	40.8%	7,111
National Aviation System	4.1%	20.7%	520
Extreme weather	9.6%	7.3%	1,218
Security	0.4%	0.1%	48

12,669 delay minutes on 188 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 KOA on time in July 2025?

84.8% of 1,382 scheduled domestic departures left less than 15 minutes late, and 85.3% reached their destination on time. The national figures that month were 69.7% and 69.0%.

How does that compare with a year earlier?

In July 2024, 87.1% of 1,463 departures left on time and 1.2% were cancelled, against 84.8% and 1.0% in July 2025.

Provenance

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