Originally Posted by gsoltso

I misspoke about the conus (Army time jumped up and bit me), it is valid for all domestic flights. The passport card is valid to get into all checkpoints. I was incorrect in the way I wrote it earlier (thanks for catching it)! If you are flying and need to get into any checkpoint staffed by TSA, the passport card is a valid ID. It will NOT, however, get you through customs if you are going to/entering from an international destination. I hope that clears up what I wrote earlier.