Will I need a passport? Yes. Travelers to and from the Caribbean, Bermuda, Panama, Mexico and Canada will be required to have a passport or other secure, accepted document to enter or re-enter the United States.  This is a change from prior travel requirements and will affect all United States citizens entering the United States from countries within the Western Hemisphere who do not currently possess valid passports.   This new requirement will also affect certain foreign nationals who currently are not required to present a passport to travel to the United States.  Most Canadian citizens, citizens of the British Overseas Territory of Bermuda, and to a lesser degree, Mexican citizens will be affected by the implementation of this requirement. 

U.S. Passport: U.S. citizens may present a valid U.S. passport when traveling via air between the United States and Canada, Mexico, Central and South America, the Caribbean, and Bermuda, and may also use a U.S. passport when traveling via sea and land borders (including ferry crossings).