Ellison Onizuka Kona International at Keahole in April 2026

85.9%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 April 2026, reporting carriers scheduled 1,298 domestic departures from Ellison Onizuka Kona International at Keahole (KOA). 85.9% left less than 15 minutes late and 84.3% reached their destination on time; 0.8% were cancelled.

Nationally that month, 79.1% of flights departed on time and 78.9% arrived on time, so KOA departures were 6.8 points above the national departure figure.

A year earlier, in April 2025, the airport had 1,274 departures with 89.0% leaving on time: a change of −3.1 points, with flights up 2%.

Flights arriving at KOA that month were on time 81.0% of the time (1,299 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 57%, air carrier 30% and national aviation system 13%.

On time 84.3%
Arrived 15+ minutes late 14.9%
Cancelled 0.8%
Diverted 0.1%

Every scheduled departure from KOA in April 2026, judged by arrival at the destination.

April 2026 against a year earlier, the airport's year and the nation

Measure	Apr 2026	Apr 2025	KOA, 12 months to Jul 2026	All reported flights, Apr 2026
Departed on time	85.9%	89.0%	85.7%	79.1%
Arrived on time	84.3%	86.3%	84.7%	78.9%
Cancelled	0.8%	0.7%	1.1%	0.9%
Average departure delay (late minutes only)	7.4 min	9.2 min	8.7 min	14.5 min
Scheduled departures a day	43	43	44	19,931
Scheduled departures	1,298	1,274	16,052	597,919

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
AS Alaska Airlines	783	60%	79.8%	4.0 min	0.4%
WN Southwest Airlines	237	18%	96.6%	-14.2 min	1.3%
UA United Airlines	146	11%	89.0%	-7.6 min	0.0%
DL Delta Air Lines	72	6%	80.6%	-2.9 min	4.2%
AA American Airlines	60	5%	86.7%	-2.2 min	1.7%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
KOA–HNL	Kona to Honolulu	589	81.3%	3.9 min	0.8%
KOA–LAX	Kona to Los Angeles	131	83.2%	-3.6 min	2.3%
KOA–OGG	Kona to Kahului	120	79.2%	5.0 min	0.0%
KOA–SEA	Kona to Seattle	111	92.8%	-10.7 min	0.9%
KOA–SFO	Kona to San Francisco	97	85.6%	-1.1 min	0.0%
KOA–SMF	Kona to Sacramento	43	86.0%	-12.7 min	0.0%
KOA–DEN	Kona to Denver	30	96.7%	-16.6 min	0.0%
KOA–LAS	Kona to Las Vegas	30	100.0%	-27.2 min	0.0%
KOA–LIH	Kona to Lihue	30	93.3%	-0.7 min	0.0%
KOA–PDX	Kona to Portland	30	86.7%	-0.8 min	0.0%
KOA–PHX	Kona to Phoenix	30	100.0%	-16.3 min	0.0%
KOA–SAN	Kona to San Diego	30	83.3%	-9.5 min	3.3%

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), April 2026.

Delay causes

BTS cause category	Share of delay minutes	National, Apr 2026	Minutes
Air carrier	29.7%	33.5%	2,467
Late-arriving aircraft	57.2%	40.4%	4,754
National Aviation System	12.8%	21.0%	1,062
Extreme weather	0.2%	5.0%	18
Security	0.2%	0.1%	17

8,318 delay minutes on 193 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 April 2026?

85.9% of 1,298 scheduled domestic departures left less than 15 minutes late, and 84.3% reached their destination on time. The national figures that month were 79.1% and 78.9%.

How does that compare with a year earlier?

In April 2025, 89.0% of 1,274 departures left on time and 0.7% were cancelled, against 85.9% and 0.8% in April 2026.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for April 2026; 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.