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.

Greece has long captivated travelers with its sun-drenched islands, ancient ruins, charming villages, and crystal-clear waters. From watching the sunset over Santorini’s caldera to wandering the historic streets of Athens, Greece offers unforgettable experiences throughout the year. But when is the best time to visit Greece?

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.