The Private Jet Charter Glossary 2026: Every Key Term You Need to Know Before You Book
The Private Jet Charter Glossary 2026: Every Key Term You Need to Know Before You Book
The most disorienting moment for anyone new to private aviation is hitting an unfamiliar term in a quote or contract. Empty leg, positioning, block hour, FBO, ACMI… miss the meaning and you can't compare quotes properly — or negotiate from strength. This glossary lays out the key terms you need before you charter a private jet, grouped into aircraft, cost, operations, products, and safety. Learn the vocabulary, and booking a private jet gets a great deal simpler.
Key Takeaways
The table below sums up the terms that come up most often in private jet charter.
Term | One-Line Definition |
|---|---|
Empty Leg | A repositioning flight flown without passengers — deeply discounted off the standard rate. |
Positioning | The ferry cost of flying an aircraft to your departure airport. |
Block Hour | The unit of flight time charter pricing is based on. |
FBO | A private jet terminal and ground-service facility. |
Jet Card | A membership that pre-buys flight hours at a fixed hourly rate. |
Aircraft Terms
First, the terms for the aircraft itself. Understand the jet, and the starting point of any quote comes into focus.
Light/Midsize/Heavy Jet: The aircraft size classes, distinguished by capacity, range, and hourly rate. For class details, see our aircraft selection guide.
Ultra-Long-Range Jet: The top class that flies 6,000+ nautical miles on a single tank (G650ER, Global 7500, etc.).
BBJ (Boeing Business Jet): A commercial airliner converted to VIP specification — used for large-group travel.
Tail Number: The aircraft's registration number — the identifier confirming the actual tail assigned to you.
Turboprop: A propeller-driven type, economical for short hops and small-airport access.
Cost & Contract Terms
The vocabulary for reading a quote and contract accurately. Know these and you can properly compare quotes that differ from provider to provider.
Empty Leg: A leg the aircraft flies empty to reposition for its next trip. If the timing fits, it can cut deeply against the standard rate. See our empty-leg deals guide.
Positioning / Ferry Flight: The empty flight that brings the aircraft to your departure point; that cost is added to the quote.
Block Hour: Time from engine start to engine stop — the base unit for charter pricing.
Wait / Overnight Fee: Charges when the aircraft stands by locally or the crew overnights.
Charter Agreement: The contract setting operating terms, liability, and cancellation policy. For safety, insurance, and contract checks, see our safety, insurance & contract guide.
Operations & Airport Terms
The terms you meet in actual operations and at the airport. On international routes especially, permits and slots drive the schedule.
FBO (Fixed-Base Operator): A private jet terminal providing fueling, parking, lounges, and other ground services. The Gimpo Business Aviation Center is a prime example (Gimpo FBO guide).
CIQ (Customs, Immigration, Quarantine): The entry/exit formalities — handled very fast at a private jet terminal.
Slot: The takeoff/landing time window an airport assigns. At congested airports, securing a slot is the key to the schedule.
Overflight Permit: Advance authorization to cross or land in another country's airspace. Some routes need several days of lead time.
Ground Handling: All on-the-ground services — fueling, baggage, line maintenance, and more.
Product & Membership Terms
There's more than one way to fly private. Choosing the product that matches how often you fly is the heart of cost efficiency.
On-Demand Charter: Booking trip by trip, as needed — the most common approach.
Jet Card: A membership that pre-buys flight hours at a fixed hourly rate — advantageous for frequent flyers (jet card guide).
Fractional Ownership: Owning a share of an aircraft. For owning vs. chartering vs. management, see our ownership vs. charter vs. management guide.
ACMI: Leasing Aircraft, Crew, Maintenance, and Insurance as a bundle — used for large group charters (group charter guide).
Safety & Certification Terms
One of the most important criteria in choosing a jet is safety. These are the certifications and ratings that gauge an operator's safety standard.
AOC (Air Operator Certificate): The license to operate air transport — the basic requirement for legal charter.
ARGUS: A third-party safety rating program evaluating operators and aircraft (Gold, Platinum, etc.).
Wyvern: Another widely used third-party safety audit standard, alongside ARGUS.
IS-BAO: The international standard safety-management system for business aviation operations.
Commonly Confused Terms
Terms that look alike but mean different things, side by side.
Pair | The Difference |
|---|---|
Empty Leg vs Positioning | Both are "empty flights," but an empty leg is an opportunity you buy at a discount; positioning is a cost added for your trip. |
Jet Card vs Fractional | A jet card pre-buys hours (no ownership); fractional is owning a share of the aircraft. |
On-Demand vs ACMI | On-demand is trip-by-trip charter; ACMI bundles aircraft, crew, maintenance, and insurance into a lease. |
Completing the Journey — VIP Meet-and-Greet at Incheon
Among these terms, CIQ (customs, immigration, quarantine) is the one that shapes your arrival experience. To minimize the wait on the way back into Incheon, add BestTurn VIP airport meet-and-greet: a dedicated team handles immigration, baggage, and the vehicle handover, so the journey from cabin door to car never breaks. The specifics are in our Incheon Airport VIP escort service guide. This is an optional add-on to the charter.
An at-a-glance comparison of the three ways to fly private — on-demand charter, jet card, and fractional ownership. Choosing the model that fits how often you fly is the starting point of cost efficiency.
Frequently Asked Questions
What exactly is an empty leg? A leg the aircraft flies empty to reposition for its next trip. If the timing fits, you can fly it at a deep discount off the standard rate.
What is an FBO? A private jet terminal and ground-service facility offering fueling, parking, and lounges — separate from the main passenger terminal, so it's fast and private.
Are block hour and hourly rate the same thing? A block hour is the unit of flight time (engine start to stop); the hourly rate is the amount charged per block hour.
What's the difference between a jet card and fractional ownership? A jet card is a membership that pre-buys flight hours (no ownership); fractional is actually owning a share of the aircraft.
How do I verify an operator's safety? Check that it holds an AOC (operating certificate) and look at third-party ratings like ARGUS, Wyvern, and IS-BAO.
Conclusion — Vocabulary Is Leverage
In private jet charter, vocabulary isn't just knowledge — it's leverage. Know the difference between an empty leg and positioning, and the hidden costs in a quote become visible. Know jet card from fractional, and you can choose the product that fits you. Know the safety-rating terms, and you can choose a safer operator. As an independent consultancy unbound by any single carrier, Air Charter Korea explains what all of these terms really mean from your side of the table, and presents at least three competing quotes.
If you're preparing to book, reach out using the contacts below. From explaining the terms to recommending the right aircraft and product for your mission and getting competing quotes — we handle it in one place. If it's your first time, our 5-step booking process guide is a good companion read.
✈️ Request a Charter Quote — Air Charter Korea
From explaining the terms to recommending the right aircraft and a tailored quote.
📞 Wonjin Choi +82-10-7723-3177 | ✉️ contact@aircharterkorea.com
🛬 Book Incheon VIP Meet-and-Greet — BestTurn
From immigration to baggage to your car on arrival — a seamless meet-and-greet (optional add-on).
📞 Steve (Team Lead) +82-10-3721-2853 | ✉️ service@bestturnaround.com | See VIP service details
Written by · Wonjin Choi — Former Korean Air Business Jet Operations Manager · Former Samsung Electronics Business Jet Account Manager
Profile: LinkedIn | Air Charter Korea company page
Published · June 15, 2026