Hello,
I now have 150,000 miles banked and wish to cash them in for a OneWorld Business award (25,000 miles). How do I figure out the distance for my proposed ticket?

What I would like to do: WAS-EZE-SCL-AKL-SYD-Melbourne-Brisbane-WAS.

Although I would much appreciate it if someone could help me by giving me the mileage, or ideas on how I could make this fit (such as open jaw, and buy a ticket from LAX-WAS and/or WAS-MIA), I would also appreciate a website or whatever so in the future I can figure this out on my own.

Thanks for teaching me to fish!