Yes, the OAL flight attendants can ride on us. No, they really are not "jumpseating" but actually using an ID-0 pass. There has to be an empty seat and they get boarded last, behind the most junior S-4. They do not have to ask permission as they are in fact non-revving. It is a reciprocal agreement between airlines. All this is buried in the FOM and DeltaNet. Helps to be married to a FA.