The Hindenburg's complete flight schedule is available at Airships.net (link below)AnswerI don't know exactly but they were both put into passenger service and were probablly in flying somewhere in the altantic as the Hindenburg and graf zep covered over one milion miles without incident not bad for a structure made from aluminum and material i am so glad zepplin company still manufactures zepplins though not as grand and impresive as the old ones, pity I would be the first passenger if they were put into the air again floating hotels much beter way to travel even though IT TAKES 2 DAYS to cross the Atlantic who cares