We are approved to list only those airlines that have international arrivals at the respective port of entry. Sometimes travelers are looking for airlines that are operating under a code-share partner, so take a look at the bottom of your ticket or in the flight status box. Also, check to see if you’re on a pre-clearance flight. At these 15 locations, U.S. Customs and Border Protection (U.S. CBP) performs the same inspection of passengers and their belongings prior to boarding U.S.-bound flights. Passengers do not have to undergo a second U.S. CBP inspection upon arrival in the U.S. and therefore do not need and cannot use the Mobile Passport App.