Originally Posted by
JerseyVics
as sbm12 posted above you could get generally cheaper o/w fares than the ones quoted in the links. I'm guessing the upside to the RTW's is availability of a last minute trip vs. purchasing something in advance?
With a Oneworld RTW ticket the OP gets up to six N. America segments included with the ticket. The airpass could be used to top up any additional required segments, would earn miles consistent with the RTW ticket, and on many routes will be cheaper than equivalent OW fares on other carriers. Not universally the case of course, but frequently.