Hilo International in September 2025

94.3%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 September 2025, reporting carriers scheduled 522 domestic departures from Hilo International (ITO). 94.3% left less than 15 minutes late and 94.3% 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 ITO departures were 11.2 points above the national departure figure.

A year earlier, in September 2024, the airport had 544 departures with 93.8% leaving on time: a change of +0.5 points, with flights down 4%.

Flights arriving at ITO that month were on time 95.0% of the time (522 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 63% and air carrier 37%.

On time 94.3%
Arrived 15+ minutes late 5.6%
Cancelled 0.2%
Diverted 0.0%

Every scheduled departure from ITO 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	ITO, 12 months to Jul 2026	All reported flights, Sep 2025
Departed on time	94.3%	93.8%	84.5%	83.1%
Arrived on time	94.3%	93.0%	82.8%	82.8%
Cancelled	0.2%	0.9%	1.0%	0.5%
Average departure delay (late minutes only)	3.2 min	2.4 min	7.5 min	12.2 min
Scheduled departures a day	17	18	18	18,748
Scheduled departures	522	544	6,609	562,439

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
HA Hawaiian Airlines	372	71%	93.0%	-0.4 min	0.0%
WN Southwest Airlines	150	29%	97.3%	-7.7 min	0.7%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
ITO–HNL	Hilo to Honolulu	496	94.4%	-2.5 min	0.2%
ITO–OGG	Hilo to Kahului	26	92.3%	-1.8 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), September 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Sep 2025	Minutes
Air carrier	36.8%	34.3%	434
Late-arriving aircraft	63.2%	37.4%	746
National Aviation System	0.0%	22.6%	0
Extreme weather	0.0%	5.6%	0
Security	0.0%	0.1%	0

1,180 delay minutes on 29 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 ITO on time in September 2025?

94.3% of 522 scheduled domestic departures left less than 15 minutes late, and 94.3% 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, 93.8% of 544 departures left on time and 0.9% were cancelled, against 94.3% 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 ITO · methodology · corrections.