I want to travel on a cruise boat from Istanbul to Antalya. Which company organizes that?How much price is it?

re is the link above:
http://www.gezisitesi.com/forms/index.aspx

As far as I know, there are no cruise boat which goes directly from Istanbul to Antalya but you can have a nice tour of the Greek islands sailing off from Istanbul and ending in Antalya.

Check out for options and prices:

http://www.toryumtur.com.tr/gemigeziler.aspx

I recommend Nice.