Our airline rules for flying UM's on Delta and US Airways are about the same (but these are not ZED tickets). Under 5 years old cannot fly by themselves. 5-14 years can fly direct flights with parent/guardian taking them to gate and picking them up at the other end--Paperwork with names etc. will need to be filled out at the ticket counter. If you work at an airport go talk to the Delta and US Airways ticket counters for better answers. Have you asked your travel department??