By Kijang/Shared Taxi Rp 50000, if you go a bit out of the port area you might get it after some haggling for 40000. Going back at the entrance of Iboi some people will arrainge a Kijang for 50000
Boats leave from Balohan.
Fast boat (1 hour, from Rp 55000) leaves at 8 am, weekend also at 4 pm. Car ferry (2 hour, from Rp 18000) leaves also at 8 pm, weekend also at 1.30 pm
Both boats can be canceled on the same day (happend to me), if you are on the last Day of your Visa you will have a problem
Unique Suggestions: Don´t leave the island at the last moment, do your sightseeing in Banda Aceh or visit at Lampuuk beach after you was in Pulau Weh