Glossary

FBO (Fixed-Base Operator)

The private terminal at an airport where charter passengers check in, park, and are greeted — separate from commercial terminals.

Part 135

The FAA regulation governing on-demand charter operators, covering pilot training, maintenance, and operational standards.

Empty Leg

A repositioning flight with no passengers booked, often sold at a steep discount versus a standard charter.

Wet Lease

An arrangement where an aircraft is provided complete with crew, maintenance, and insurance.

AOG (Aircraft on Ground)

A grounded aircraft awaiting parts or repair — often the reason for time-critical cargo charter.

ARGUS / Wyvern

Independent third-party organizations that audit and rate charter operators for safety compliance.

Jet Card

A membership program offering locked hourly rates and guaranteed aircraft availability without owning a jet.

Deadhead

A flight leg flown without paying passengers to reposition the aircraft — the source of empty-leg pricing.