Core Holidays
Akti Beach Club, 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 £386 per person (40%).
£500£650£800£950£1,100MayJunJulAugSepOctApr

May 27 in Kos averages a daily high of 23°C with about 4 wet days — £26 per °C, per person.