Daniel K Inouye International in September 2025

90.8%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 September 2025, reporting carriers scheduled 4,480 domestic departures from Daniel K Inouye International (HNL). 90.8% left less than 15 minutes late and 91.0% reached their destination on time; 0.2% were cancelled.

Nationally that month, 83.1% of flights departed on time and 82.8% arrived on time, so HNL departures were 7.7 points above the national departure figure.

A year earlier, in September 2024, the airport had 4,845 departures with 91.4% leaving on time: a change of −0.6 points, with flights down 8%.

Flights arriving at HNL that month were on time 87.6% of the time (4,484 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 63%, late-arriving aircraft 31% and national aviation system 3%.

On time 91.0%
Arrived 15+ minutes late 8.6%
Cancelled 0.2%
Diverted 0.1%

Every scheduled departure from HNL in September 2025, judged by arrival at the destination.

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

Measure	Sep 2025	Sep 2024	HNL, 12 months to Jul 2026	All reported flights, Sep 2025
Departed on time	90.8%	91.4%	83.5%	83.1%
Arrived on time	91.0%	90.7%	82.0%	82.8%
Cancelled	0.2%	0.5%	0.9%	0.5%
Average departure delay (late minutes only)	6.7 min	5.0 min	10.4 min	12.2 min
Scheduled departures a day	149	162	159	18,748
Scheduled departures	4,480	4,845	58,088	562,439

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
HA Hawaiian Airlines	2,635	59%	90.2%	1.3 min	0.2%
WN Southwest Airlines	978	22%	95.7%	-8.4 min	0.2%
UA United Airlines	318	7%	91.5%	-5.9 min	0.3%
DL Delta Air Lines	277	6%	89.5%	-3.0 min	0.7%
AA American Airlines	152	3%	86.8%	1.1 min	0.7%
AS Alaska Airlines	120	3%	80.0%	3.6 min	0.8%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
HNL–OGG	Honolulu to Kahului	853	94.6%	-2.1 min	0.0%
HNL–LIH	Honolulu to Lihue	625	91.8%	-0.7 min	0.6%
HNL–KOA	Honolulu to Kona	570	94.4%	-2.7 min	0.4%
HNL–ITO	Honolulu to Hilo	496	95.0%	-1.8 min	0.0%
HNL–LAX	Honolulu to Los Angeles	386	90.2%	-6.2 min	0.0%
HNL–SEA	Honolulu to Seattle	240	77.1%	9.7 min	0.0%
HNL–LAS	Honolulu to Las Vegas	180	87.2%	0.1 min	0.0%
HNL–SFO	Honolulu to San Francisco	146	90.4%	0.6 min	0.0%
HNL–SAN	Honolulu to San Diego	140	88.6%	-3.9 min	0.0%
HNL–PHX	Honolulu to Phoenix	92	93.5%	-12.0 min	0.0%
HNL–PDX	Honolulu to Portland	71	87.3%	-3.4 min	0.0%
HNL–LGB	Honolulu to Long Beach	60	95.0%	-5.8 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), September 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Sep 2025	Minutes
Air carrier	62.6%	34.3%	14,722
Late-arriving aircraft	31.0%	37.4%	7,290
National Aviation System	3.4%	22.6%	811
Extreme weather	2.6%	5.6%	606
Security	0.5%	0.1%	106

23,535 delay minutes on 384 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 HNL on time in September 2025?

90.8% of 4,480 scheduled domestic departures left less than 15 minutes late, and 91.0% reached their destination on time. The national figures that month were 83.1% and 82.8%.

How does that compare with a year earlier?

In September 2024, 91.4% of 4,845 departures left on time and 0.5% were cancelled, against 90.8% and 0.2% in September 2025.

Provenance

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