New Castle, NH is located one hour north of Boston, MA, one hour south of Portland, ME, and 50 minutes east of Manchester, NH. All of these cities have airports and rental car options. There is also a bus (C&J Bus Lines) from Boston Logan Airport to Portsmouth, NH, which is the town right next to New Castle. There is also a train (Amtrak Downeaster) which departs from both Boston or Portland and brings you to Dover, NH, which is a 25 minute drive from the Wentworth by the Sea.