Block time runs from brake release at the departure ramp to parking brake set at the destination: taxi out, takeoff, cruise, approach, and taxi in. The name comes from the wooden blocks once pulled from the wheels before pushback. It is the industry's standard billing clock, and it is always longer than the airborne time you see on a flight tracker.
The gap is bigger than most first-time charterers expect. Taxi at a busy field like Teterboro or Van Nuys can run 10–20 minutes each way, and climb-outs and arrival sequencing add more. A New York–Miami trip that shows 2 hours 25 minutes in the air typically blocks at around 2 hours 50 minutes; a "45-minute hop" from Los Angeles to Las Vegas usually bills as 1.1–1.3 block hours. Operators quote and settle against block time (or a planned block estimate agreed in advance), so the same route can legitimately show different times from different operators depending on their taxi and routing assumptions.
For the customer, block time is the multiplier behind almost every number on a quote. A light jet at $2,500–3,600 per block hour turns those extra 25 minutes of taxi into roughly $1,000–1,500 of real money, and on a one-way trip the standard pricing shorthand — block hours × hourly rate × 1.5 to cover repositioning — magnifies it further. When comparing options, compare the total price and the assumed block time together, not the hourly rate alone: a cheaper rate against a padded block estimate is not cheaper. Contracts also differ on true-ups — some bill actual block flown, others bill the greater of actual or quoted, so ask which applies.
Two related clocks cause confusion. Flight time (wheels up to wheels down) is what pilots log for some regulatory purposes and what trackers display — it is not what you pay for. And minimum daily hours can override block time entirely: most operators bill at least 1.5–2 hours per calendar day the aircraft is committed to you, so a 40-minute hop may still invoice as two hours. Neither is sharp practice; both are standard, and a transparent quote states them plainly.
The cost scenarios in the Yond app break each estimate into per-leg block-hour costs — including the empty positioning legs — so you can see exactly where the hours, and the dollars, come from before you contact the operator.
