Hilo International in May 2025

92.6%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 May 2025, reporting carriers scheduled 569 domestic departures from Hilo International (ITO). 92.6% left less than 15 minutes late and 93.7% reached their destination on time; 0.2% were cancelled.

Nationally that month, 76.7% of flights departed on time and 75.4% arrived on time, so ITO departures were 15.9 points above the national departure figure.

A year earlier, in May 2024, the airport had 577 departures with 81.8% leaving on time: a change of +10.8 points, with flights down 1%.

Flights arriving at ITO that month were on time 92.9% of the time (567 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 52%, air carrier 47% and national aviation system 1%.

On time 93.7%
Arrived 15+ minutes late 6.2%
Cancelled 0.2%
Diverted 0.0%

Every scheduled departure from ITO in May 2025, judged by arrival at the destination.

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

Measure	May 2025	May 2024	ITO, 12 months to Jul 2026	All reported flights, May 2025
Departed on time	92.6%	81.8%	84.5%	76.7%
Arrived on time	93.7%	78.3%	82.8%	75.4%
Cancelled	0.2%	1.4%	1.0%	1.0%
Average departure delay (late minutes only)	4.8 min	9.9 min	7.5 min	17.5 min
Scheduled departures a day	19	19	18	20,188
Scheduled departures	569	577	6,609	605,648

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
HA Hawaiian Airlines	414	73%	93.7%	0.6 min	0.0%
WN Southwest Airlines	155	27%	93.5%	-4.1 min	0.6%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
ITO–HNL	Hilo to Honolulu	542	93.4%	-0.6 min	0.2%
ITO–OGG	Hilo to Kahului	27	100.0%	-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), May 2025.

Delay causes

BTS cause category	Share of delay minutes	National, May 2025	Minutes
Air carrier	47.3%	29.3%	980
Late-arriving aircraft	51.5%	37.8%	1,067
National Aviation System	1.1%	25.9%	23
Extreme weather	0.0%	6.9%	0
Security	0.0%	0.1%	0

2,070 delay minutes on 35 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 May 2025?

92.6% of 569 scheduled domestic departures left less than 15 minutes late, and 93.7% reached their destination on time. The national figures that month were 76.7% and 75.4%.

How does that compare with a year earlier?

In May 2024, 81.8% of 577 departures left on time and 1.4% were cancelled, against 92.6% and 0.2% in May 2025.

Provenance

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