Airlines should stay away from Israel's Ben Gurion International Airport from Thursday, according to Hamas' military spokesperson.
Abu Ubaida also said the group would target Israeli public sites such as football stadiums and he cautioned Israelis living near to Gaza against returning to their homes.
There have been two days of quiet in Gaza. No rockets or missiles, no more destroyed houses, no more ambulance sirens screaming.
A three-year-old girl has been rescued from Gaza and brought to London for life-saving heart surgery.
A small team of NHS doctors and surgeons is travel to Gaza to set up facilities and establish how best to use specialists and equipment.