Yes you can, link here but I think you might need to log into your account first. It is only very limited this is what it says "For hotel stays, please note you can only spend your Flying Club miles with Gitcombe House in Devon or tip your miles into Hilton HHonors."
Not something I have ever looked into as I don't really like Hilton hotels, one at DTD is OK but way overpriced. http://www.virgin-atlantic.com/en/gb/frequentflyer/earnmiles/flyingclubpartners.jsp
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