Thanks to the 100K point sign up, some Amex bonus transfers and household spend, my partner and I find ourselves with half a million Avios and a companion pass. We're trying to determine how to make the best use of them. We would like to visit Australia, Europe (get there by plane, explore by train), Asia (Shanghai, Hong Kong, Thailand) and South America (Argentina and Uruguay), and had been thinking to take two months to do a RTW trip. I'm not clear, though, if Avios can be used for a OneWorld RTW ticket. Also, I don't know if a companion pass can be used for such a ticket, or if it can only be used for a more traditional out and back type flght. Any insight on that would be greatly appreciated! If there is a better way to use the miles (individual trips, or beginning a trip outside the US, for example) I'm wide open for suggestions. We'd like to fly business or first, and we can handle the fact that there will be some fuel surcharges -- though avoiding them would be nice. We'll also have about 300K USAirways points, and about 150K American points, if we need to use them, too. So, any ideas of how to start thinking about this would be great -- I'm a bit overwhelmed by the idea, but want to be sure and get the best use from these points as possible!