Dubrovnik is located about 120 kilometers from Korcula. The best way to get there is to take a catamaran or a ferry from Korcula to Dubrovnik. The trip takes about 2-3 hours, depending on the type of ship. Another option is to rent a private boat or a car with a driver for a more personal experience. It is also possible to take a bus from Korcula to Dubrovnik, which takes about 3-4 hours.