Island of Korcula
Depends from which part are you arriving, from the north (Zagreb) or west (Rijeka) of Croatia, you will need to take motorway Zagreb-Split or Rijeka-Split. When you arrive to Split, there is a daily ferry line, and during a season are several lines. Sailing schedule is available on Jadrolinija web site.
There is another way travelling to the island of Korcula by car, which will speed up travelling more after finishing the motorway Zagreb – Dubrovnik and building a bridge to peninsula Peljesac. But at the moment it is possible to take of the motorway in Split and drive along Dalmatian Coast on Adriatic highway (Jadranska magistrala). You will need to take of the highway when you see on the table Ston, which is also turning for the peninsula Peljesac. You will need to follow the sign directing you to the town Orebic, where you can take a ferry (20 min drives) and you will arrive in port Domince on the island of Korcula. From there you’ll need to follow the road to village Smokvica. When you arrive to village Smokvica, you will see the table Brna, for turning of the main island road. From the Smokvica village, you will have just a few minutes drive.
If you are arriving from Italy with a ferry to Split, you will just take a direct ferry line from Split to Vela Luka. Also there are regular ferry lines connecting Korcula with Dubrovnik and Split. Ferry line from Domince to Orebic sails on hourly basis.
Airport is in Split and Dubrovnik have regular lines to all major European towns. Upon arrival to Split airport (Resnik) or Dubrovnik (airport Cilipi), you can either rent a car , take a taxi or bus and drive to the Split or Dubrovnik ferry port, which will take you around 20 minutes.