The kingdom "will do everything it can to save the life and secure the release of its pilot," Maaz al-Kassasbeh, who was captured by the jihadists after his plane crashed in Syria in December, government spokesman Mohammed al-Momeni told the official Petra news agency.
ISIS has been demanding the release of a convicted Iraqi jihadist on death row in Jordan in exchange for Kassasbeh's life, a demand the government has expressed readiness to accept provided it is given proof he is still alive.
"All state organizations have been mobilized to secure the proof of life that we require so that he can be freed and returned to his home," Momeni said.
He condemned the jihadists' murder of Japanese journalist Kenji Goto after days of intensive efforts through intermediaries to save him.
"We spared no effort, in coordination with the Japanese government, to save his life," Momeni said.
Goto was the second Japanese hostage in a week to be executed by the jihadists in what they have said is punishment for Tokyo's pledge of $200 million (175 million euro) in aid to countries affected by its bloody seizure of swathes of Iraq and Syria last year.
Last week, ISIS claimed responsibility for the beheading of Haruna Yukawa after the expiry of a 72-hour ultimatum.
The jihadist ISIS wants freed – Sajida al-Rishawi – was sentenced to death for her role in the 2005 bombings of three Amman hotels by Al-Qaeda in Iraq which killed 60 people.
Her husband was one of the three suicide bombers and the court found that she had would have been a fourth but for the failure of her detonator.