Originally Posted by
sparseflyer
r/t fares are combinable on a half r/t basis with another half r/t fare that is also combinable.
So you can take half a prc90 and half a zrc90 to create a p outbound and z inbound round trip.
But you cannot take half a prc90 to create a one way fare, unless prc90 is also published as a one way with its own specific cost.
Check china. Asia has quite a few. For tatl it's mostly the j/c y/b that do.