We travel non rev a lot and the problem with the ZEDS is the fare is calculated on a point to point to point basis.. So, the fare from JFK-LHR is less the JFK-AMS-LHR. just an example ...the ZED rules are pretty clear......the departure/arrival cities have to be "co located or within the same fare. You can go from AMS to CDG or AMS to FRA, etc on the same ZED ticket. As stated earlier, the ZED tickets are easy to do online, the refunding is fast and easy. As long as you have internet access, you can book what you need almost immediately.