Taking a ferry from Italy to Split Croatia is your best way if you are traveling from Italian Adriatic coast. The major departure ports from Italy to the opposite shore of the Adriatic, are Ancona and Pescara.
When traveling by ferry from Italian ports to Split Croatia you will need updated ferry timetable schedule and all maritime companies that sail to and from all ports in Italy to Croatia.
Split port has very good ferry connections with Italian coast. In 2017 only three maritime companies will keep connections from Italy to Croatia but only one among them will keep all year-round regular connections to Split.
Keep in mind that crossings from Italy to Split are strictly seasonal and only in high season there are 3 daily crossings with Blue Line, SNAV and Jadrolinija (Croatian company). The crossing time is around 11 hours.
The only international ferry connection to Split is from Ancona, Italy. Jadrolinija, Croatian maritime company is the only one that connects both Adriatic shores all the year around.
I've already mentioned that Jadrolinija is the only company that will connect Italian coastal city Ancona to Split the whole year from January 01 to December 31, 2017. Here is the timetable from Ancona to Split and Split to Ancona
International lines 2017 Croatia - Italy by Jadrolinija
SNAV are one of the largest ferry companies operating in Southern Europe with services crossing the Adriatic, Mediterranean and Tyrrhenian sea.
The SNAV shipping company has decided to focus on Croatia for the season spring/ summer 2017. Croatia, has been for several years a favorite destination for Italian tourists, both family travelers but for young people seeking for resorts with a lively nightlife.
SNAV for 2017 relaunches the line for Croatia with several changes. From Italy to Split this company has announced to start with first crossing from April 5 until 7 October 2017. This year tourist will be able to enjoy the beauty of the mild climate in Croatia even in autumn.
Blueline is third carrier that runs ferry services transporting passengers and vehicles between Croatia and Italy.
The Blue line ferry service will be active also between April 5 until 7 October 2017 with connections between the Italian port of Ancona and the Croatian port of Split, as well as seasonal services to the Croatian ports of Stari Grad and Vis (this line isn't confirmed so far) .