Ellison Onizuka Kona International at Keahole in December 2025

81.3%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 1,389 domestic departures from Ellison Onizuka Kona International at Keahole (KOA). 81.3% left less than 15 minutes late and 79.6% reached their destination on time; 0.9% were cancelled.

Nationally that month, 72.0% of flights departed on time and 71.9% arrived on time, so KOA departures were 9.3 points above the national departure figure.

A year earlier, in December 2024, the airport had 1,391 departures with 88.1% leaving on time: a change of −6.8 points, with flights down 0%.

Flights arriving at KOA that month were on time 77.4% of the time (1,389 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 54%, air carrier 29% and national aviation system 13%.

On time 79.6%
Arrived 15+ minutes late 19.4%
Cancelled 0.9%
Diverted 0.1%

Every scheduled departure from KOA 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	KOA, 12 months to Jul 2026	All reported flights, Dec 2025
Departed on time	81.3%	88.1%	85.7%	72.0%
Arrived on time	79.6%	88.9%	84.7%	71.9%
Cancelled	0.9%	0.5%	1.1%	1.5%
Average departure delay (late minutes only)	10.4 min	6.5 min	8.7 min	21.2 min
Scheduled departures a day	46	46	44	19,410
Scheduled departures	1,389	1,391	16,052	582,304

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
HA Hawaiian Airlines	594	43%	75.6%	10.9 min	0.2%
WN Southwest Airlines	244	18%	89.8%	-5.5 min	0.0%
AS Alaska Airlines	229	16%	76.0%	3.8 min	2.2%
UA United Airlines	152	11%	87.5%	-5.4 min	0.7%
AA American Airlines	96	7%	81.3%	-4.2 min	0.0%
DL Delta Air Lines	74	5%	70.3%	5.5 min	8.1%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
KOA–HNL	Kona to Honolulu	607	77.1%	8.8 min	0.2%
KOA–LAX	Kona to Los Angeles	133	80.5%	3.1 min	0.8%
KOA–OGG	Kona to Kahului	124	83.1%	4.6 min	0.0%
KOA–SEA	Kona to Seattle	123	78.0%	2.9 min	4.9%
KOA–SFO	Kona to San Francisco	91	83.5%	-1.7 min	1.1%
KOA–PHX	Kona to Phoenix	45	84.4%	-10.7 min	0.0%
KOA–SMF	Kona to Sacramento	45	84.4%	-0.4 min	0.0%
KOA–DEN	Kona to Denver	31	93.5%	-12.9 min	0.0%
KOA–LAS	Kona to Las Vegas	31	96.8%	-25.6 min	0.0%
KOA–LIH	Kona to Lihue	31	93.5%	-0.3 min	0.0%
KOA–PDX	Kona to Portland	31	80.6%	-8.0 min	0.0%
KOA–SAN	Kona to San Diego	31	61.3%	10.2 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), December 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Dec 2025	Minutes
Air carrier	28.9%	33.3%	3,766
Late-arriving aircraft	53.6%	41.1%	6,982
National Aviation System	13.0%	19.1%	1,689
Extreme weather	4.6%	6.4%	601
Security	0.0%	0.2%	0

13,038 delay minutes on 269 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 December 2025?

81.3% of 1,389 scheduled domestic departures left less than 15 minutes late, and 79.6% 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, 88.1% of 1,391 departures left on time and 0.5% were cancelled, against 81.3% and 0.9% 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 KOA · methodology · corrections.