Your passport may still be valid, but you could be denied entry

Time to check your passport if you’re still planning to travel abroad this summer.

Even if your passport is still valid, some countries require at least six months of validity beyond your intended travel dates, according to the State Department, Delta Air Lines and United Airlines.

While less common, American Airlines adds, "Some countries require your passport to be issued at least 6 months before the day you arrive."

The State Department is holding Special Passport Acceptance Fairs across the country in April and May to help travelers get their passports processed.

According to the National Travel and Tourism Office, the latest data show a continued imbalance between international travel to and from the United States, with Americans traveling abroad in greater numbers than foreign visitors arriving.