A cruise ship traveling at a standard cruising speed can cover approximately 500 nautical miles (575 land miles) in 24 hours. For example, in 24 hours, a cruise ship can travel from Port Canaveral, Florida, to Havana, Cuba. Or Barcelona, Spain, to Livorno (Pisa), Italy. Of course, this doesn't account for the weather, fuel consumption, ocean currents, and other hazards. But it gives you a good approximation of what a typical cruise ship can travel in one day.