Etihad Airways Upgrade
I purchased a return ticket online with Etihad from Dublin to Sydney in Economy. I am currently in Australia. Something has come up in work which requires me to be in work on the day I land in Dublin. I want to upgrade to business class so that I am nicely rested on my return. I don't have sufficient miles to upgrade so it is going to have to be a cash upgrade. Do I just ring up Etihad Reservations and get them to upgrade the ticket or is there another process to follow? Will they just charge for Sydney to Dublin or is it a complete round trip they will charge for?