Which operators fly empty legs out of Siena-Ampugnano Airport?Empty leg supply at Siena-Ampugnano Airport comes from FAA Part 135 charter operators repositioning aircraft to or from paid bookings at the airport. The specific operator is visible on each leg listing — every operator on SkyAccess holds an active Part 135 Air Carrier Certificate. What aircraft categories fly empty legs from Siena-Ampugnano Airport?Aircraft mix at Siena-Ampugnano Airport reflects the operator fleet active in Ampugnano (SI), IT-52, IT. Light jets typically dominate by leg count; midsize and super midsize jets are common on longer corridors; heavy jets and ultra-long-range aircraft appear less often but at deeper percentage discounts when they do.