They might.  Subterranean termites, of most types, will travel at lest 50 metres through the soil to exploit good food.  Termites flying from colonies can sometimes spread a thousand metres.  If your house is well maintained and has a termite management plan, the risk can be reduced to something quite acceptable (but never totally removed).  Apart from known colonies of major pests very close to a building, there is usually little to

It might, but don't count on it. Baits are good at grabbing termites' attention and can be used to slowly poison their colony BUT baits are not barriers and it is possible for termites to ignore them and eat your home anyway. The termites mightn't find them, the baits might be poorly placed, they mightn't suit your termites, they might be too often disturbed or left too long, too wet or too dry. Baits are great at cutting populations and even killing colonies, but it is probably best that you add other ways to keep termites out of your home, just to be sure.

A few times each year the sky seems to fill with fluttering termites, but not all of the termites get to fly. The colony lets a few grow wings and strike out into the world. A rare time when termites act as individuals. These fliers (called alates) are just for colony reproduction. They seek to find a mate and start a new nest of their own. Just like most of we do.