15 EAN Holdings LLC (Operating as Enterprise, Alamo and National car rental companies)
Report Abuse. If you are a U.S. citizen, then you do not need a passport for Hawaii. Hawaii is part of the United States. If you travel to the Caribbean, Canada, Mexico or other places outside of the United States, then you will need a passport starting January 23, 2007 for air travel. Source(s): http://travel.state.gov/travel/cbpmc/cbp...
You will need a valid passport if you are thinking about taking a vacation abroad, frequently travel outside of the US, have a job that will require international travel, or have family living overseas that you would like to visit. There are currently two types of documents for US citizens: passport books and passport cards.