By Air, Waikiki
If you are living anywhere other than Hawaii, your options are limited on how to get to Waikiki. I would recommend flying into Honolulu, (HNL), then renting a car, taking a shuttle, or catching a cab to Waikiki.
There are many different options on getting to HNL, so consult your local travel agent, or go online to find a cheap seat!
Helicopters are VERY expensive, but worth the money for the breathtaking views of the islands, which you can not see any other way.