Core Holidays
Blue Horizon by Sotiris, Svoronata

Price by departure month

Per person, 7 nights, 2 adults — cheapest of ten UK airports. Going in May 27 instead of Aug 27 saves £134 per person (27%).
£300£350£400£450£500£550MayJunJulAugSep

May 27 in Kefalonia averages a daily high of 26°C with about 4 wet days — £14 per °C, per person.