"The Jordanian air force launched raids against positions of the Islamic State group," said a government official, who did not want to be named.
He did not disclose where the strikes took place, saying the military would release a statement on the operation later.
Jordan has conducted regular raids against IS in Syria as part of a US-led campaign against IS, which has seized swathes of the country and of neighbouring Iraq.
Jordanian King Abdullah II personally paid his condolences today to the pilot's family in his hometown of Karak, 120 kilometres south of the capital.
Abdullah cut short a visit to the United States and flew back to Amman yesterday after the harrowing video emerged of Kassasbeh's killing.
"The blood of martyr Maaz al-Kassasbeh will not be in vain and the response of Jordan and its army after what happened to our dear son will be severe," he said afterwards.
