Thanks, but I think the point is missed. As a non-US citizen I can go where I like, including Cuba, but the rules (due to regulations from US Government) prevent any travel "via" Cuba if I travel on AA.

So is CUN-SCL via Cuba? Arguably yes it is, and if QF won't ticket it, fine, I can buy another segment for NA and be done with it. A bigger problem would be turning up for an AA flight and having the whole thing confiscated. That would be bad.

So unless anyone *knows* that you can do CUN-SCL then might be best to pay the extra segment and not have to risk anything...