You won't find a large number of flights into Santorini because the airport can't accommodate more than 6 civilian aircraft at one time.
The only flight operator from Dublin is XL:
http://www.xl.com/
They also fly from Cork, Gatwick, Manchester & Newcastle
First Choice, Thomas Cook & Thomsonfly operate from Manchester and Gatwick:
http://flights.firstchoice.co.uk/
http://book.flythomascook.com/skylights/cgi-bi n/skylights.cgi
http://www.thomsonfly.com/
Reviews of 362 hotels in Santorini, in order of popularity, can be found here:
http://www.tripadvisor.com/Hotels-g189433-Sant orini_Cyclades-Hotels.html
Chris