From England :

Charter Flight Centre [charterflights.co.uk]
http://www.charterflights.co.uk/flights/greece/crete_(heraklion)
GB Airways - operating as British Airways with full service, low cost flights
http://www.gbairways.com/

From Switzerland-Austria-Germany :

Air Berlin - Fly Euro Shuttle!
http://www.airberlin.com/site/index.php
Germanwings
http://www10.germanwings.com/index.de.shtml

From Italy (Pescara) :

http://www.flyonair.it/

From Norway :

http://www.norwegian.no/