The drive from Halifax airport to Cabot is not a difficult one. Call it 3 1/2 hours. Much of it is very scenic and quite enjoyable.
Halifax has direct flights from Boston, NYC/Newark, Chicago, and Philadelphia. In June direct flights from Detroit, Atlanta and Washington get added.
You can also fly from Halifax to Sydney, but there is little advantage, since you then have to drive 90 minutes or so to either course.