I was an undergrad at Dartmouth, and while I always drove to and from school, most of my friends from away flew into Boston and then took the Dartmouth Coach, which is part of Vermont Transit. It will take you from the airport right to the campus green with eithier no stops or one stop in Manchester. You can also fly into Lebanon, NH, but you have to ride in one of those tiny unstable planes and then take a 10 mile cab ride to get on campus, so I don't recommend it, especially during winter months or at weird hours. I don't know of anyone that ever flew into Burlington...