I still think easyjet offer amazing value for money but this is the key, you have to be there ready to pounce the seconds after they go live. I speak from many years experience. I am restricted to school holidays and as we were usually 5 it was worth the sleepless nights to grab some amazing deals. Personal best was 5 returns with baggage £650 in Aug. Usually first couple of weeks in Oct for the July and Aug flights. Easyjet never let on the exact date.