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I don't know of an absolute / definitive answer. If it were my site, I think I would be happy to take the chance with Event markup since there is no perfect match, as you say. Evidence in each direction: Yes - this is OK - Google's schema page talks about "If the event happens across several streets, define the starting location and mention the full details in description. No - this is not OK - the same page says "Don’t promote non-event products or services such as "Trip package: San Diego/LA, 7 nights" as events". The reason I wouldn't be too concerned about the "no" side is that I think it is reasonable to read that as being about things like flights where the point is getting to the destination rather than things like cruises which are arguably events in their own right. Good luck!