One of the most complete travel sites I've ever seen, Australian Travel.com.au, offers very interesting and great choice of international flights. Among them, there are different possibilities to undertake Round the World flights, too.
This site presents very clear navigation where you can choose your destination in some seconds if you know where you have to go. Click on Europe, Asia, North America or any other part of the world listed under the main search tool of the site, and you will pass to the page with the departure points. I like this solution. Sometimes, you do not know what airports are serving this or that direction and loose time and money booking the flights that are too far from you. It happened different times to me and that is why I appreciate it so much.
In case you do not know where to go this time, you can find different options on Travel.com.au where banners and photos present most interesting flights of the moment. There are flights on sale, cheap business class flights and other possibilities. What means it for you? It's that you can treat yourself with love: travel in business class at economy price, for example.
Do not forget to control very useful page of Travel Tools where all the useful information you need before you depart is collected. And in case you need help, you can call Travel Experts of the company. Travel.com.au is known for it's excellent client service.