Source: Dear AFA

Flight Attendants who are working crewmembers once again this year have the ability to travel with up to two people using Buddy Passes at the crewmember's personal pass classification.  The program applies to both the domestic and international operation and is available beginning December 18, 2012 and ending on or before midnight January 5, 2013

When creating your reservation through United's employeeRes, remember to check the "traveling with working crewmember" box to be sure your "buddies" are booked at the correct pass classification. You are required to notify the gate agent in person when your "buddy" accompanies you and at any connecting cities where there is an aircraft change. If there are no seats available, the "buddies" will travel at the unaccompanied classification on another flight, which they can be boarded.