Whether or not you need a passport to go to Hawaii depends on your citizenship status. American citizens do not need a passport to travel to Hawaii since it is part of their country. However, you would need a passport if you are not an American citizen.
If you are a citizen of the United States, you will not need a passport to fly to Hawaii. If you are not a citizen of America then you will need a passport. All travelers will need a current state issued ID to travel via air.