To strengthen U.S. border security, the Western Hemisphere Travel Initiative (WHTI) sets standards for proving identity and citizenship for citizens of the U.S., Canada, and Bermuda crossing U.S. borders. These standards determine what travel documents U.S. and non-U.S. citizens need to enter the U.S. from Canada, Mexico, the Caribbean, and Bermuda. Travelers who enter from Puerto Rico, the U.S. Virgin Islands, and other U.S. territories are not affected by WHTI standards.

Visit the Department of Homeland Security's WHTI FAQ page to find the specific travel documents you will need to enter the U.S. from these locations by air, land, and sea.