Yes, most airlines allow you to fly without being accompanied by the employee, I believe B6 (JetBlue) is one of the few that requires the employee to fly with you (because you're listed as a friend and not a family member, ie spouse, dependent, parent). Remember, you won't be flying for free, you'll be flying at a very reduced rate (as long as their are seats available) and you'll find your self near the bottom of the standby list.

Ask your brother to email [email protected] and to request a copy of the interline agreement. That document will give you and him a list of all of the airlines that we have agreements with and what the specifics are.

Sign-up to add/change who is on his flight privelege list is from Feb 1 to Feb 28 this year, assuming we're still in business of course.