Catch the plane to Split and than the ferry boat from Split to Supetar. Some airlines do fly directly to the new airport on the Brać Island. 
To check for ferry boat time schedule and price list click Jadrolinija
If the airplane is not one of your favorites, you can easily get to us with a car or bus.

      ferry boat:    www.jadrolinija.hr

SUPETAR AREA MAP: