Empty Leg vs On-Demand Charter: Which to Book and When
Empty leg flights and on-demand charter are two different products that overlap in a confusing zone. Both are operated by Part 135 air carriers. Both are private jets. Both can take you on the same route on the same day. The difference is in the trade you accept — empty legs are price-led with the operator dictating schedule; on-demand charter is schedule-led with the customer dictating everything. Here's the side-by-side.
By SkyAccess Editorial · Empty Leg Marketplace Team · May 24, 2026
Key takeaways
- Empty leg discount range:
- 25–80% off on-demand charter
- Empty leg schedule constraint:
- Operator dictates date, time, airports, aircraft
- On-demand cancellation:
- Customer-controlled; deposit forfeit per operator contract
- Empty leg cancellation:
- Originating booking can void the leg (rare, refunded)
Price
Empty legs price below retail charter because the operator's positioning cost is already committed by the originating booking. The price floor is closer to fuel + landing fees than to the operator's all-in retail rate, which is why same-aircraft, same-route empty legs can land 25–80% below on-demand charter quotes on the same calendar day.
On-demand charter prices reflect the full economic cost of the trip: aircraft hour, crew, fuel, positioning (in both directions if needed), federal excise tax, segment fees, and operator margin. The number on the quote is what the operator needs to recover all those costs plus return on capital.
Practical rule: if the empty-leg discount is 40%+ off the equivalent on-demand quote on your trip, the savings are usually worth the schedule trade. Under 25%, the math weakens because you're paying flexibility cost for a thin price gap.
Schedule control
On-demand charter: customer dictates the departure date, time, airport pair, and aircraft. The operator builds the trip around the customer's requirements. Typical lead time is 24-72 hours from quote to wheels-up, though same-day quotes are routine on heavily trafficked routes.
Empty leg: operator dictates the departure date, time, airport pair, and aircraft category. The customer accepts the published schedule or doesn't book. Departure windows on empty legs are typically 4-24 hours wide; the exact takeoff time within the window is set by the originating booking's actual completion time.
Aircraft choice
On-demand charter: customer chooses the aircraft category (turboprop, light jet, midsize, super midsize, heavy, ultra long range) and often the specific model within the category. Operators with multiple aircraft will offer options. Customer-specific needs — catering, weight allowance, pet allowance, lavatory style — can be matched to the right airframe.
Empty leg: aircraft is whatever's flying the positioning segment. The customer sees the aircraft type and category at search time and accepts or declines, but doesn't choose. Category-specific empty leg supply varies — light jets are abundant on most US corridors, ultra-long-range repositioning is rare.
Cancellation risk
On-demand charter: cancellation policy is the operator's standard charter contract. Typically 25–50% deposit forfeit if cancelled outside 7 days, with 100% forfeit inside 72 hours. Schedule changes are negotiable up to 24-48 hours pre-departure.
Empty leg: cancellation policy includes a unique risk — if the originating paid booking moves or cancels, the empty leg can be voided with no obligation to the empty-leg buyer beyond a refund. Reputable marketplaces refund the empty-leg buyer in full when this happens. The risk is small but non-zero, and the timing is often inside 24 hours of departure.
When each product wins
Empty leg wins when: schedule is flexible (±2 days, 6+ hour departure window), route is positioning-dense (high-traffic corridor), group is paying flat aircraft price (4+ passengers), and trip is non-critical to specific timing.
On-demand charter wins when: schedule is fixed and high-stakes (wedding, board meeting, closing), routing is non-negotiable (specific airport pair, specific aircraft for catering or weight), trip is round-trip with non-flexible return, or trip is more than 30 days out (empty leg inventory doesn't really exist that far ahead).
Frequently asked questions
- What's the difference between an empty leg and a charter?
- A charter is a customer-dictated trip with the operator building the flight around the customer's date, time, and airports. An empty leg is an operator-dictated trip — the customer accepts the operator's schedule in exchange for 25–80% off the retail charter rate.
- Is an empty leg considered a private jet charter?
- Yes. Empty legs are operated under the same FAA Part 135 certificate, with the same crew, the same aircraft, and the same maintenance and safety standards as a retail charter. The economic and scheduling structure is different; the product is the same.
- Can you turn an empty leg into a round trip?
- Sometimes — by booking an empty leg in each direction. Both legs have to be available on dates that work for the customer, on the same aircraft category, with operators whose schedules align. It's possible on heavily trafficked corridors but rarely lines up cleanly. Most round trips end up as empty leg outbound + on-demand return, or vice versa.
Glossary references
Related guides
- Are empty legs worth it?
Empty legs are worth it when your schedule is flexible and your route maps to operator positioning patterns. Here's the decision framework — including when to skip and pay retail.
- How empty leg flights work
Empty legs are positioning flights that operators sell at 25–80% off retail. Here's exactly how the supply chain works, why discounts vary, and how to find them.
- Empty leg cost explained
Empty leg prices range from ~$5,000 for a 1-hour light jet to $50,000+ for a transcontinental heavy jet. Here's how the pricing is built and what drives variance by aircraft, route, and timing.
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