<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by HK-UMICH:
Donno the exact rule, but I am sure if you are not using that airline for "across the water" flight, they will not take the hassle to do the ticketing.</font>
My DONEW3 was booked with AA's RTW desk, and it had
zero AA segments. I'm sure any OW airlines would gladly book you, they do earn commission for selling the tickets. Please, RTW are revenue tickets, they're not doing you a favour.