On SV, as mutt mentioned - only for you and eligible dependends (spouse and kids in KSA) one yearly free confirmed domicile (to the nearest SV station on SV and the remaining segment on other airlines), and one free standby to any SV station. Free means you pay airport taxes.
On the other hand, for you and your eligible relatives (spouse, kids under 24, parents) after six months of service you have unlimited ZED travels on other airlines (not on SV though) worldwide via myidtravel according to agreements.