Which operators fly empty legs out of Humberto Delgado Airport (Lisbon Portela Airport)?Empty leg supply at Humberto Delgado Airport (Lisbon Portela Airport) comes from certified charter operators repositioning aircraft to or from paid bookings at the airport. Every operator on SkyAccess holds an active air carrier certificate (Part 135 in the U.S., or the equivalent authority abroad); operator identity is confidential and confirmed when you book. What aircraft categories fly empty legs from Humberto Delgado Airport (Lisbon Portela Airport)?Aircraft mix at Humberto Delgado Airport (Lisbon Portela Airport) reflects the operator fleet active in Lisbon, PT-11, PT. 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.