How reliable is Boise Air Terminal/Gowen Field?
Flights from BOI departed within 15 minutes of schedule in 87% of 161,078 flights in official BTS history — and weather is calmest in Jun. 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 BOI looks like
On-time departures
across 161,078 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 Boise
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 · 98/100 favorability
Roughest month
Most disruptive — low visibility & fog, snow · 74/100 favorability
The read on BOI
What the numbers say about flying through Boise Air Terminal/Gowen Field
Across official performance history, flights from Boise left within 15 minutes of schedule about 87% of the time over 161,078 flights. That's one of the more dependable operational records you'll see. Pair it with a low cancellation rate of 0.7%, so flights here rarely vanish outright. When a departure does run late, the typical delay is around 6 minutes.
On weather, Boise is an unusually calm-weather airport year-round. June is the calmest stretch for flying, scoring 98 out of 100 for favorable conditions, while December is the most disruptive at 74, driven mainly by low visibility & fog and snow. The seasonal swing is real but manageable; favor the calmer months when your dates are flexible.
None of this guarantees your specific flight — it’s the backdrop. To turn it into a booking, score real flights to Boise, 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 BOI
- How reliable is Boise Air Terminal/Gowen Field (BOI)?
- Flights from Boise left within 15 minutes of schedule roughly 87% of the time across 161,078 flights of official history — one of the more dependable operational records you'll see. The cancellation rate runs about 0.7%. It's advisory context, not a guarantee for any single flight.
- What is the best month to fly from BOI for good weather?
- June has the calmest flying weather at Boise Air Terminal/Gowen Field. December is the most disruptive, mainly from low visibility & fog and snow.
Planning a trip through Boise?
Score real flights to and from BOI on reliability, weather, and connection safety — not just price.