Istanbul is 1 hour ahead of Bucharest year-round. Istanbul uses TRT (UTC+3). Bucharest uses EET (UTC+2) in winter and EEST (UTC+3) in summer.
When it's 12:00 PM in Bucharest, it's 1:00 PM in Istanbul (during EET).
Most hours work! With only a 1 hour difference, business hours overlap almost entirely.
Istanbul and Bucharest are connected by direct flights taking about 1.5 hours. Turkish Airlines operates multiple daily flights.