My husband and I intend to visit our son in Sydney , then travel on to Tokyo to visit our other son travelling early March 2014 returning to England beginning of April 2014. When am I likely to find the best deals and how? Is it easier/cheaper to go through a travel agent? I've looked on a couple of websites but cant find the flights that I need, or at a price adverts lead me to expect. Am I looking too early or just in the wrong place?