You can do a BA two or more oneworld airlines award and go round the world if you desire. The cost is determined by the mileage of your routing and the class of service.
https://www.britishairways.com/trave...g/public/en_gb
Click on the link for 2 or more oneworld airlines.
You can also purchase a round the world ticket and similar less than round the world circle tickets. Info here:
http://www.oneworld.com/ow/air-travel-options
For booking the oneworld explorer round the world ticket you can use the booking tool:
http://oneworldrtw.innosked.com/
More info on paid (not mileage) oneworld round the world and circle tickets at the oneworld forum:
http://www.flyertalk.com/forum/oneworld-411/
See also:
http://www.flyertalk.com/forum/briti...ing-miles.html