Originally Posted by ijgordon
And I think the good news is that being on a LONE*, you can book any existing AA codeshares along the way, subject to L class availability of course. If purchasing regular tickets, the AA codeshares are often meaningfully more expensive than if ticketed on the operating carrier, but you won't have to worry about that on the OWE.
Note: This is true
only for AA codeshares on oneWORLD Metal. i.e. If it's an AA codeshare, the flight must be operated by AY/BA/CX/EI/IB/LA/QF/LP.