Firm vs estimated: what the price flag actually tells you about an empty leg

Two prices, two mechanisms

A firm price on an empty leg is exactly what it sounds like — the operator has set a number, published it, and is prepared to take a booking at that number without further negotiation. An estimated price is different. It is a range the operator's dispatch system has generated, usually from a rule that says something like flightHours × hourlyRate × 0.55, minus positioning credit. It is a placeholder more than a quote. When we split our June 2026 snapshot into the two categories, firm-priced legs made up 41 percent of the sample and estimated legs made up 32 percent; the balance carried no price field at all and forced the buyer to enquire before receiving a number.

The first useful observation is that the estimate flag is not a discount signal. The average USD-converted price on estimated legs was almost identical to the firm-priced average — within 4 percent — and the median was virtually the same. Anyone reading the feed with the assumption that estimated prices are systematically softer or systematically higher than firm prices is reading noise. The flag is a workflow signal, not a pricing one, and its usefulness lies in what it tells you about how the operator prices, not about what the number itself will do.

What firm actually means

An operator who publishes a firm price on a leg has usually done three things. They have completed a fresh review of the specific mission — fuel prices at the origin FBO, crew day cost, handling fees at both airports. They have decided that the leg is a genuine sales priority and that they want it lifted off the feed as quickly as possible. And they have chosen, deliberately, to hold themselves to that number in negotiation because reversing on a published firm price damages the operator's credibility with the broker community. In practice, firm-priced legs sell faster; they lift off our own feed at roughly twice the rate of estimated legs within the first 24 hours of appearing.

That speed differential matters for a buyer. If you see a firm price you like, on a leg that fits your mission, the correct behaviour is to move within the same working hour. The population of buyers who read that feed is small but active, and the firm-priced legs are the ones being watched most closely. Waiting until the following morning to enquire is a reliable way to arrive at a leg that has already been lifted.

What estimated actually means

An estimated price, by contrast, is a signal that the operator's dispatch office has published the leg to test demand rather than to close a sale. The number is the output of an internal formula rather than a negotiated position, and the operator is very often willing to move materially away from the published estimate — in either direction — once a serious enquiry lands. The most common estimate pattern in our data is a mid-range midsize jet on a route the operator does not usually fly for that particular passenger profile; the dispatch team has generated a placeholder and pushed it out to see whether the broker community produces a live buyer.

For a buyer, the practical takeaway is that an estimate is a starting point for a conversation, not a rejection notice. If the estimated number is 30 percent above your budget and the mission is genuinely a fit for your trip, it is worth an enquiry — the number will move. Conversely, if the estimate is unexpectedly low relative to the market average for that aircraft class and corridor, be prepared for the eventual firm quote to land higher; the operator may have generated the number without accounting for a specific cost that will surface when they actually price the mission properly.

Fill-rate and time-on-feed

When we track the two categories through their life on the feed, the divergence becomes more meaningful. Firm-priced legs have an average time-on-feed of 32 hours before they either lift or are withdrawn; estimated-price legs stay on the feed for an average of 71 hours — more than twice as long. Fill rates are similarly split: roughly 55 percent of firm-priced legs eventually sell against 34 percent of estimated ones. The remaining estimated legs either fly the reposition without a passenger or are pulled by the operator when the primary trip changes.

This gap explains a phenomenon that mystifies first-time users of the feed. Why do so many legs sit unsold for days at prices that look, on paper, extremely attractive? The answer is almost always the estimate flag. A price that reads like a bargain but has been sitting on the feed for four days without movement is almost certainly an estimate the operator is not willing to honour at the published number. Real bargains — firm prices on legs that fit a genuine broker demand — lift within hours, and if you are seeing one that has been available since Monday, the odds are high that the price is neither firm nor available at the number shown.

Reading the flag correctly

For our own desk, the firm-versus-estimate split is the second filter we apply after operator identity. A firm-priced leg from a top-ten operator on a fit-for-mission corridor is treated as a live opportunity to be closed immediately; an estimated-price leg from the same operator is treated as a starting position that will require a phone call before the client gets a real number. A leg with no price at all — the remaining 27 percent of the feed — is treated as an enquiry-only listing, and in practice we lead with a direct call to the operator's charter sales desk to establish what the real number is before we forward anything to the client.

For a charter buyer working the feed on their own, the useful mental model is that firm-priced legs are the market's tight, transactable inventory, and estimated legs are the market's loose, negotiable inventory. Both categories can produce genuine value; they just require different reading. Confusing the two is the single biggest reason a first-time empty-leg buyer walks away frustrated after two weeks of chasing legs that looked cheap on the screen and turned out not to be cheap in the quote.

The estimate flag is, in this reading, the most important piece of metadata on the feed. It is not a discount indicator, but it is a workflow indicator that reliably predicts how much back-and-forth a leg will require before a real quote appears. Treat it that way, and the empty-leg market becomes considerably more legible.