Good news for Pre-Checkers: The Transportation Security Administration has expanded its Pre Check expedited screening program to international trips instead of just domestic itineraries. Now you can leave your shoes on when you're leaving the country.

Pre Check usually offers a much shorter screening queue and old-fashioned screening when you get to the checkpoint. You leave your shoes, belt and light jacket on, liquids and laptops in their bag, and walk through a metal detector instead of full-body scanner. It's quick, easy, and delightful for travelers when it works.

One complaint has been that it periodically doesn't work. Travelers who have gone through the background check to get into Pre Check get to the screening checkpoint and get told they aren't eligible for Pre Check for that flight. Sometimes it's a random measure to force even Pre Check participants into more rigorous screening. Sometimes it's simply that the name on an airline reservation doesn't match up exactly with the name in the Pre Check profile. And often it has been because a trip involved an international flight, making it ineligible for Pre Check.

That will change on May 7. TSA says passengers departing on "select" international flights on Alaska Airlines, American Airlines Delta Air Lines , United Airlines and US Airways at the 40 airports that have Pre Check screening lanes will be eligible for the expedited screening. Passengers arriving from abroad and making a connection to another flight will be eligible beginning May 7 as well.

It won't be all international flights–TSA says only "select" flights will be allowed. But the agency has been trying to expand Pre Check, get more people enrolled, and make it easier to use. The agency has decided to preprint Pre-Check acceptance on boarding passes so that travelers will know if they have the magic pass before they get to the checkpoint. Airlines are modifying their systems to accommodate the Pre Check notice.