Search facility in flight alerts - waypoints, airports


For planespotters the Flight Alert function is great. A much appreciated development of this function would be a standing alert based on a searchword, like a specific waypoint or your nearest airport, rather than on a specific flight. Since especially the longhaul international flights select quite different routes from day to day, such a function would alert me of all flights that plan passing over my local airport (GRM).

Would this be possible??