Planning an international trip? Understanding travel entry requirements before you go can help prevent unexpected delays. From passport validity and travel visa requirements to health documentation and electronic authorizations, here’s what U.S. travelers need to know about international travel documents before heading abroad.

International travel begins long before you board a plane. Whether you're dreaming of a Mediterranean cruise, a European river voyage, or an all-inclusive escape in Mexico, one of the most important travel documents you'll need is a valid passport.