There are 2 possibilities.
From Split airport by Taxi or bus to the Split ferry port.
1st– The easiest way is to go with Catamaran from Split. You can buy tickets and check the schedule online on www.jadrolinija.hr (we recommend you to buy ticket minimum 7 days before in full season)
2nd– Other solution is to go to the ferry in Split, the ferry will take you to Supetar (45min), Supetar is on the other side of the island, then by taxi or bus to the Bol (1 hour). The ferry schedule you can find on www.jadrolinija.hr
The taxi from Supetar to Bol is 400 Kn (approximately 53 eur) if we organize the transport, you have to tell us the ferry time minimum one day in advance.