3 ms·The passport card is no longer valid for international flights, only entry by land or sea.by laurencerowe 7y agoThe passport card is no longer valid for international flights, only entry by land or sea.blahedo 7y agoIt was never valid for international flights. It is, however, valid as ID for domestic flights (and I have used it as such).kelnos 7y agoEntertainingly, it is even valid in lieu of a REAL ID if you don't get around to getting a new ID before Oct 2021.