Flight
Boston Logan International Airport is usually the cheapest and most accessible. Manchester Boston Regional Airport (MHT) and Portland International Jetport (PWM) are also within an hour and are relatively accessible if you plan to rent a car. We would suggest checking all three! While you certainly don't have to rent a car, it would probably be cheaper than using ride-share services.
Hotel
We are working on setting up a room block here so check back soon!