Ellison Onizuka Kona International at Keahole in January 2025

89.2%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 January 2025, reporting carriers scheduled 1,377 domestic departures from Ellison Onizuka Kona International at Keahole (KOA). 89.2% left less than 15 minutes late and 85.7% reached their destination on time; 1.6% were cancelled.

Nationally that month, 79.3% of flights departed on time and 78.6% arrived on time, so KOA departures were 9.9 points above the national departure figure.

A year earlier, in January 2024, the airport had 1,402 departures with 78.0% leaving on time: a change of +11.2 points, with flights down 2%.

Flights arriving at KOA that month were on time 89.6% of the time (1,378 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 48%, air carrier 30% and extreme weather 12%.

On time 85.7%
Arrived 15+ minutes late 12.5%
Cancelled 1.6%
Diverted 0.2%

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

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

Measure	Jan 2025	Jan 2024	KOA, 12 months to Jul 2026	All reported flights, Jan 2025
Departed on time	89.2%	78.0%	85.7%	79.3%
Arrived on time	85.7%	76.1%	84.7%	78.6%
Cancelled	1.6%	5.2%	1.1%	3.0%
Average departure delay (late minutes only)	8.2 min	15.0 min	8.7 min	14.0 min
Scheduled departures a day	46	47	44	17,992
Scheduled departures	1,377	1,402	16,052	539,747

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
HA Hawaiian Airlines	662	48%	86.0%	6.8 min	2.0%
WN Southwest Airlines	279	20%	93.5%	-4.6 min	1.4%
AS Alaska Airlines	190	14%	80.0%	-5.4 min	1.1%
UA United Airlines	116	8%	83.6%	4.5 min	0.9%
AA American Airlines	68	5%	86.8%	-4.0 min	0.0%
DL Delta Air Lines	62	5%	67.7%	13.6 min	3.2%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
KOA–HNL	Kona to Honolulu	677	87.9%	4.8 min	2.1%
KOA–LAX	Kona to Los Angeles	129	76.7%	8.0 min	1.6%
KOA–OGG	Kona to Kahului	127	93.7%	-3.2 min	1.6%
KOA–SEA	Kona to Seattle	123	79.7%	-6.5 min	3.3%
KOA–SFO	Kona to San Francisco	45	80.0%	11.0 min	0.0%
KOA–PHX	Kona to Phoenix	37	91.9%	-3.9 min	0.0%
KOA–DEN	Kona to Denver	31	77.4%	5.6 min	0.0%
KOA–LAS	Kona to Las Vegas	31	90.3%	1.5 min	0.0%
KOA–LIH	Kona to Lihue	31	90.3%	2.5 min	0.0%
KOA–OAK	Kona to Oakland	31	87.1%	-3.1 min	0.0%
KOA–PDX	Kona to Portland	31	90.3%	-16.1 min	0.0%
KOA–ANC	Kona to Anchorage	28	89.3%	-10.2 min	0.0%

By scheduled departure hour

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

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

Delay causes

BTS cause category	Share of delay minutes	National, Jan 2025	Minutes
Air carrier	29.6%	36.2%	3,372
Late-arriving aircraft	47.5%	34.7%	5,416
National Aviation System	11.3%	19.9%	1,286
Extreme weather	11.5%	9.1%	1,317
Security	0.2%	0.2%	19

11,410 delay minutes on 172 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 January 2025?

89.2% of 1,377 scheduled domestic departures left less than 15 minutes late, and 85.7% reached their destination on time. The national figures that month were 79.3% and 78.6%.

How does that compare with a year earlier?

In January 2024, 78.0% of 1,402 departures left on time and 5.2% were cancelled, against 89.2% and 1.6% in January 2025.

Provenance

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