Empty legs flights are a great way to save money on a private jet charter. Empty legs occur when an aircraft flies from, for example, airport A to airport B, but then is needed to fly from airport C to airport D. The airport B to airport C leg is called the empty leg because while the aircraft must fly that leg in order to be available for the C to D charter, no one has booked it for the B to C leg.
Many private jet companies will offer this leg at a discounted rate so that they don’t have a flight with no passengers at all. Any private jet company or broker offering empty legs will advertise the flights available on their websites.