Renting a car, which may be done at the airport, and walking are the easiest ways to get around Manchester. Bus service and taxis are also available, although bus service is relatively limited and taxis can be expensive. Renting a car, or knowing a local who has one, will make your life considerably easier.
The Manchester Transit Authority
110 Elm Street, Phone: +1 603 623-8801, (http://www.mtabus.org/). Service within the city including between the airport and bus terminal. It's typically hourly and fares are $1. It stops at around 6pm.On foot: Downtown Elm St. has become more walkable as of late, much of the sites are within walking distance.