Quote Originally Posted by italgreco View Post
Nick - There is and there are. We have quite a number of C/J class ZED agreements. UA do not permit a refund if we utilise a C class ticket in Y on another carrier so the rule of thumb is to have 2 sets of tickets issued and at the gate, swap coupons.
Which is exactly why most airlines do not have J class ZED. The ideal situation would be to sell ZED upgrade vouchers (e.g., x% of the ZL, ZM, or ZH fare for each zone), but that idea has not caught on, unfortunately. That way the employee buys one ticket (YIDZM) and one voucher for ZM zone 1, that the agent can return to the traveler if they cannot accommodated him in the higher cabin. Not sure, though, how that would work in an electronic enviroment.