Core Holidays
Mitsis Summer Palace, Kardamena

Price by departure month

Per person, 7 nights, 2 adults — cheapest of ten UK airports. Going in May 27 instead of Aug 27 saves £579 per person (37%).
£850£1,050£1,250£1,450£1,650MayJunJulAugSepOctApr

May 27 in Kos averages a daily high of 23°C with about 4 wet days — £43 per °C, per person.