A Fixed-Base Operator is the service company at an airport that handles private aviation: a passenger lounge, ramp access, fueling, hangar space, catering coordination, ground transport, and aircraft handling. The name is a relic of the barnstorming era, when "fixed-base" distinguished permanent airfield businesses from itinerant pilots. In practice, the FBO is your terminal — when you charter, you skip the main building entirely and drive to a separate facility, often straight onto the ramp to the aircraft stairs.
The experience is the core of why people fly private. Arrive 15 minutes before departure, walk from car to cabin in a few dozen steps, and your bags follow you. There is no TSA checkpoint for most Part 135 departures — the crew verifies identity — and no boarding process. On arrival, a car can usually meet the aircraft. Large airports host multiple competing FBOs: Teterboro has five, Van Nuys several, and big international gateways like Paris–Le Bourget a dozen. Your operator chooses the FBO and tells you which one; getting the name right matters, because two FBOs at the same airport can be a mile of ramp apart.
FBOs are also a cost center that shows up on your invoice. They earn most of their money selling fuel at a markup, and they charge ramp and handling fees that typically run $100–500 for a light jet and $500–1,500 for a heavy jet at premium facilities — often waived if the aircraft buys enough fuel. Overnight parking, hangar space in winter, lav service, catering handling, and de-icing all flow through the FBO too. Operators generally pass these through at cost, which is one reason a trip's final invoice can differ slightly from the quote. At slot-controlled or event-period airports, FBO ramp space itself becomes scarce — during a Super Bowl or F1 weekend, parking reservations can cost thousands and sell out weeks ahead.
One misconception worth correcting: the FBO is not the operator. It neither flies the aircraft nor sets your charter price; it is the ground vendor both you and the flight crew pass through. Service quality varies — the majors (Signature, Atlantic, Million Air) are consistent but pricier, while independent FBOs can be cheaper and friendlier — and on cost-sensitive trips it is fair to ask your operator whether a cheaper FBO on the field works. At single-FBO airports, there is no choice to make.