JEDDAH, 19 May  — International passengers of Saudi Arabian Airlines will be able to exchange currencies and transfer money to any country while on board, according to Shouqi Mushtaq, manager of sales systems at the airline. He said the new service would be available by next Saturday on Saudia flights to Europe, America, South Africa and East Asia. The service will be provided in cooperation with Skyteller, an affiliate of the American First Data Corporation. Mushtaq said the service would be limited to transferring money to countries where the passenger was traveling, using credit cards and traveler checks.