The first cruises for Carnival start on June 27...
Some of the May, June, cruises to Alaska-Bermuda-New England/Canada , got canceled because Canada and Bermuda closed their borders and the foreign flagged cruise ships couldn't leave an American port and return to an American port without visiting a foreign port.(Canada-Bermuda for example, closed their ports.)
Also our CDC didn't want them to cruise from our ports, at this time.-Tom