Last time I rode DAL to Europe, it was the same as their domestic. If they got an agreement with your company, good to go. Just remember, regradless of CASS, no riding up front if it fills up. Not even on the way out of the US.
CAL has a domestic reciprocal list and an international reciprocal list, like American. If your company is not on the int'l list, NO INT'L JS FOR YOU!!!!!!