Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Belfast to Sibiu as you normally would.
For a flight from Belfast to Sibiu, you will be flying into Sibiu. Sibiu (SBZ) is just 3.0 mi from the center of the city. Sibiu is the only Sibiu airport and it handles 0 inbound flights from Belfast per day. 0 airlines have flights to Sibiu from Belfast on a regular basis.