That's a tough one, currently we do not offer the option for duplicating multiple pages, and there's some good designer's logic behind this decision - when you duplicate a page, you are actually creating a copy from the page's Master state. However, this Draft copy contains the exact content and properties like the Master, so each time you duplicate a page you need to edit some of them (e.g. UrlName) so that the page can be published and exist on its own without being in conflict with the other Sitefinity content. If you insist on achieving this functionality, you can try to implement a solution with the Pages API
where you can get a page and programatically create a draft copy of it, which you can later change the UrlName and Title and publish.
the Telerik team
Do you want to have your say in the Sitefinity development roadmap? Do you want to know when a feature you requested is added or when a bug fixed? Explore the Telerik Public Issue Tracking
system and vote to affect the priority of the items