Hilo International in May 2026

79.8%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 May 2026, reporting carriers scheduled 568 domestic departures from Hilo International (ITO). 79.8% left less than 15 minutes late and 77.6% reached their destination on time; 0.7% were cancelled.

Nationally that month, 77.1% of flights departed on time and 77.6% arrived on time, so ITO departures were 2.7 points above the national departure figure.

A year earlier, in May 2025, the airport had 569 departures with 92.6% leaving on time: a change of −12.8 points, with flights down 0%.

Flights arriving at ITO that month were on time 80.1% of the time (568 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 61%, air carrier 27% and national aviation system 12%.

On time 77.6%
Arrived 15+ minutes late 21.7%
Cancelled 0.7%
Diverted 0.0%

Every scheduled departure from ITO in May 2026, judged by arrival at the destination.

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

Measure	May 2026	May 2025	ITO, 12 months to Jul 2026	All reported flights, May 2026
Departed on time	79.8%	92.6%	84.5%	77.1%
Arrived on time	77.6%	93.7%	82.8%	77.6%
Cancelled	0.7%	0.2%	1.0%	0.9%
Average departure delay (late minutes only)	10.3 min	4.8 min	7.5 min	16.0 min
Scheduled departures a day	19	19	18	20,391
Scheduled departures	568	569	6,609	611,735

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
AS Alaska Airlines	413	73%	70.9%	12.7 min	1.0%
WN Southwest Airlines	155	27%	95.5%	-7.4 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
ITO–HNL	Hilo to Honolulu	542	77.3%	7.3 min	0.7%
ITO–OGG	Hilo to Kahului	26	84.6%	4.5 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), May 2026.

Delay causes

BTS cause category	Share of delay minutes	National, May 2026	Minutes
Air carrier	27.1%	33.0%	1,435
Late-arriving aircraft	60.7%	40.4%	3,212
National Aviation System	12.2%	20.5%	645
Extreme weather	0.0%	6.0%	0
Security	0.0%	0.1%	0

5,292 delay minutes on 123 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 2026?

79.8% of 568 scheduled domestic departures left less than 15 minutes late, and 77.6% reached their destination on time. The national figures that month were 77.1% and 77.6%.

How does that compare with a year earlier?

In May 2025, 92.6% of 569 departures left on time and 0.2% were cancelled, against 79.8% and 0.7% in May 2026.

Provenance

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