Originally Posted by
Cat Man Do
i second the school ID. If it's a US public school, that counts as government-issued photo ID.
Incorrect. School ID's are not on the list of approved government-issued ID's. Here is the list.
http://www.tsa.gov/traveler-information/acceptable-ids
Just get her the state ID or an expedited passport. It's theoretically possible to travel on a domestic flight with no ID, but that requires independent verifications. Given that a 16 YOA may well not have established credit, utility service and the like, it's not worth the hassle.