I have flown a few times on UA Buddy passes. What they have told me is that on former UA flights, that an unaccompanied person can only fly coach and business. If they are with the employee they can obviously also fly first,of course this is all based on availibility . The cost for each cabin is different. On former CO flights you can only fly coach without the employee. I have gotten very lucky and was able to fly to the the London Olympics both ways in Business from Chicago (this was decided on a week before the games, and the seats were wide open!) and was slated to fly Business to Rome in November, but super storm Sandy unfortunately changed that...but I still got Premium Economy. Good luck all!