Can travel soon?

Today, daddy was bugging mother about his expiring mileage in the Singapore airline. Daddy said that it will expire about 20k miles in coming July and more in September month. Mother told Daddy that there would be a two weeks school holiday in beginning of June. Now where should we bring Ethan to travel? In mother's mind got three places i.e. Hong Kong, Perth and Japan. Which place is suitable still under consideration. We will consider the weather and the transport since we are bringing Ethan along.