Could someone please give me a rough cost on a rtw ticket via europe the states and australia back to bkk around early june.Would i be better of booking this early or leaving it to last minute fares.thanks for any help

It should be in the 90.000 Baht region without tax, on Star Alliance airlines. They allow for very flexible routings. Taxes differ based on what airports you go through, but you should expect about 10%, I guess.

There are no last-minute fares, the cheapest way is to purchase a complete RTW fare, so as soon as you know your exact route, go for it for best seat availability. For more info, check www.staralliance.com , they even have a RTW Mileage calculator and contact info for these fares.