How reliable is Hilo International Airport?
Flights from ITO departed within 15 minutes of schedule in 88% of 38,407 flights in official BTS history — and weather is calmest in Sep. Here’s the full picture before you book.
Reliability score
on-time, cancellations & delays
Weather favorability
year-round climate
Origin-airport operations
What the departure punctuality at ITO looks like
On-time departures
across 38,407 flights
Source: BTS Airport Operations · data through 2026-06-25. Role-specific BTS departure history; advisory context, not a guarantee for any flight.
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Weather by month
When the weather works for you at Hilo
A calm-weather score (0–100) for each month from decades of airport observations — how often conditions disrupt flying, not temperature. Higher is calmer.
Calmest month
Calmest flying weather of the year · 96/100 favorability
Roughest month
Most disruptive — low visibility & fog, thunderstorms · 92/100 favorability
The read on ITO
What the numbers say about flying through Hilo International Airport
Across official performance history, flights from Hilo left within 15 minutes of schedule about 88% of the time over 38,407 flights. That's one of the more dependable operational records you'll see. Pair it with a low cancellation rate of 1.0%, so flights here rarely vanish outright. When a departure does run late, the typical delay is around 4 minutes.
On weather, Hilo is an unusually calm-weather airport year-round. September is the calmest stretch for flying, scoring 96 out of 100 for favorable conditions, while March is the most disruptive at 92, driven mainly by low visibility & fog and thunderstorms. The year is relatively steady, so no single month stands out as one to avoid on weather alone.
None of this guarantees your specific flight — it’s the backdrop. To turn it into a booking, score real flights to Hilo, read how we weigh it all in how the PlaneSane Score works, and brush up with how to pick a reliable flight and avoiding weather delays.
Common questions about ITO
- How reliable is Hilo International Airport (ITO)?
- Flights from Hilo left within 15 minutes of schedule roughly 88% of the time across 38,407 flights of official history — one of the more dependable operational records you'll see. The cancellation rate runs about 1.0%. It's advisory context, not a guarantee for any single flight.
- What is the best month to fly from ITO for good weather?
- September has the calmest flying weather at Hilo International Airport. March is the most disruptive, mainly from low visibility & fog and thunderstorms.
Planning a trip through Hilo?
Score real flights to and from ITO on reliability, weather, and connection safety — not just price.