PublishingPageInformation publishingPageInfo = new PublishingPageInformation();
publishingPageInfo.Name = pageFileName // Set file name here;
publishingPageInfo.PageLayoutListItem = layout // Url of the page layout inside master page gallery;
// Adding new page to web.
PublishingPage publishingPage =pubWeb.AddPublishingPage(publishingPageInfo);
publishingPage.ListItem["Title"] = pageTitle; //title of the page
publishingPage.ListItem.Update();
_ctx.Load(publishingPage.ListItem);
_ctx.ExecuteQuery();
pageURL = publishingPage.ListItem["FileRef"].ToString(); // this will give you the URL of the page added