U.S. Customs and Border Protection – Travel Information for International Visitors
For International Visitors
Information for visitors to the United States who are coming to work, study, conduct business or to immigrate.
–
Admission into United States – 06/22/2009 Frequently asked questions about the admission process for entering into the United States.
Air Travel If you are traveling by plane to Mexico or Canada, please keep in mind that all travelers, including U.S. and Canadian citizens, are required to have a passport or other accepted form of documentation to enter or depart the United States.