I would like to transfer an icloud email address from one apple id to a different apple id. Is this possible?

It isn't possible. If you need to use a different iCloud account with a different ID as your primary iCloud account, you can still set up your other iCloud address as a secondary account by going to Settings>Mail,Contacts,Calendars>Add Account>iCloud, signing in with your ID and turning Mail to on. It will be fetch rather than push email, however, as push is only supported in the primary account.