A ferry fee is the line item on a charter quote that charges for empty repositioning flying: the aircraft traveling from wherever it is to your departure airport, or from your destination onward to its base or next commitment. It is the same underlying cost as a positioning flight — crew, fuel, engine cycles, landing fees, all with zero passengers — but stated explicitly rather than folded into a blended price. Whether you see a ferry fee at all is mostly a quoting-style choice: some operators quote all-in, others show the revenue legs at the hourly rate and the ferry legs separately.
The math is usually the hourly rate applied to the empty hours, sometimes discounted. An aircraft ferrying 1.5 hours to reach you at a light-jet rate of $2,500–3,600 produces a ferry fee around $3,750–5,400; operators hoping to win the trip may discount the ferry 25–50%, and an operator whose aircraft needs to travel your direction anyway may waive it entirely. The same economics power the industry's blended shorthand — a one-way priced at block hours × hourly × 1.5 is simply a ferry fee averaged into the rate. That means an itemized quote with a visible ferry fee is not more expensive than an all-in quote; it is more legible. Compare totals, not line-item counts.
For the customer, visible ferry math is an advantage, because it is the component of a quote that varies most between operators and is most worth shopping. Two operators quoting the same aircraft type for the same trip can differ by $5,000 purely on where their jets sit that morning. It also frames better questions: if the ferry fee is large, is there a similar aircraft closer? Would shifting the trip a day let the operator pair your leg with another customer's and split the positioning? On multi-day trips, does it cost less to pay ferry legs home and back (the return-to-base scenario) than to pay daily minimums for the aircraft to wait?
This is exactly the comparison the Yond app is built to make: estimates are broken into per-aircraft cost scenarios — staying, returning to base, repositioning — with each ferry leg priced separately, against live known aircraft positions. The aircraft with the small ferry number is usually the one to contact first. One caution: a quote with no ferry fee and a suspiciously low total may simply omit repositioning "to be confirmed later." The empty miles exist regardless of the paperwork; make sure the total you compare includes them.