Flight Ops HQ

Glossary

Block Time

Block time is the billable flight interval operators use for charter—typically from wheels-up to wheels-down or chocks-off to chocks-on—not the same as gate-to-gate airline scheduling or your door-to-door day.

Why it matters

Why block time matters

Quotes are priced in occupied hours. Block time is how those hours are measured. Taxi, hold, and approach minutes count toward block time even when you think of the trip as a short hop. Comparing a broker's block estimate to your own gate timing causes confusion at invoice time.

Cost

How it affects cost

Hourly rate multiplied by billable block hours is the core charter charge. Long taxi at busy airports, weather holds, and diversion routing increase block time without changing the map distance. Daily minimums may bill more block hours than a single short leg actually flies.

Example

A quick example

A Friday 4 p.m. TEB departure to Hanscom sits in hold for forty minutes for sequencing, then bills a 1.5-hour minimum block. Your watch shows fifty minutes airborne; the invoice shows ninety minutes occupied.

Related terms

Other terms to know

Common questions

Is block time the same as flight time?

Operators often use block time for billing. It usually includes taxi and airborne minutes under a defined chocks-off to chocks-on or wheels-up to wheels-down standard stated in the contract.

Why is block time longer than the map suggests?

Taxi at busy airports, routing, holds, and minimum billable hours all add to occupied time beyond great-circle distance divided by cruise speed.

How do I estimate block time for planning?

Use route page flight-time context and the charter calculator, then confirm billable hours—not just airborne minutes—in the quote.

Last reviewed May 2026. Estimates use planning assumptions that we revisit periodically.