Bonair (Turkey) (Istanbul Sabiha Gökcen) added a first Challenger 605, ch-aviation research revealed.

TC-KZU (msn 5821) is a 15.2-year-old Bombardier Business Aircraft previously registered as T7-UGR. It was managed by ACASS Europe, and was the only Challenger 605 in the company's San Marino-registered fleet. The aircraft's last flight under the T7- registration was on November 24, 2024, between Milan Linate and Istanbul Atatürk. On December 13, the aircraft flew under the new Turkish registration to London Biggin Hill.

The Challenger 605 joins a fleet of 10 other aircraft operated by Bonair, including a Challenger 850, a Citation Bravo, a Citation V, three GIV-SPs, a Global Express XRS, a Hawker 750, and two Hawker 850XPs.