Originally Posted by AlwaysFlyStar

The flight pass is for individual flights. Not returns. So you could do ZRH-ATH ZRH-ATH if you wanted. Or ATH-ZRH ATH-ZRH. Or ZRH-ATH, ATH-GVA. Or you could use all of your vouchers for ZRH-ATH. I have the domestic multi-city pass from ATH and I have used a couple of one ways when Aegean had a promotion which made one of the directions cheaper.