My parents are going to germany in September, they wanted me to look for tickets online. I've searched all the popular sites (Orbitz, Travelocity, Priceline...), and I've also been using Yahoo which searched several sites. What site do you travelers use? I assume the earlier you looks for tickets the better, but I've also heard that airfare is really sporadic, and change frequently and it might be good to wait til the end of summer. But I don't want to wait til the last month and find only $1000 tickets. So fill me in on the best time to get tickets. And any other suggestions.