One of the nation's best public transportation system is TheBus with many convenient routes and schedules. The fare is generally $2 for a ride to anywhere with a free transfer that can be used for a period of 2 hours. Monthly and Annual passes are available. The best deal for seniors is an annual pass for $30 giving you unlimited travel on all routes for 12 months. 

TheBus

Other useful websites:

Aloha Airlines    Hawaiian Airlines    Go! Airline    United Airlines    American Airlines

JAL    Air Canada    Qantas    ATA Airlines