Once you are eligable, can`t remember the qualifying period, but it`s not long. You can also name one other for the same privilages i understand. You can go most places on the flybe network (not sure if its the same price for France or Spain) as a standby 9 quid plus tax per ticket so its 19 quid one way. If you want to book a firm ticket its a bit more. After a years service i think you get one free return flight and that number goes up with time. Staff Travel Dept at flybe is run by two very helpfull ladies. They have all manner of deals with touchdown and goodness only knows who, from airlines to ferry companies. They do very well.
Cheers MB