Yes. Asiana allows you to buy one way tickets for half the price of a return. A one way from Korea on Star alliance is 40,000 in Y, 60,000 in J and 80,000 in F. So you can buy ICN-ATH and ZRH-ICN. If you are prepared to fly only on Asiana, it is less miles and you only need 105,000 for a return in J. However, Asiana does not fly to Athens, Zurich or Milan but it will get you to Rome or Frankfurt.