EasyJet say that seats on their flights next winter will go on sale in two phases during April.
Flight ticket prices for peak periods like New Year and February Half term tend to climb rapidly as soon as the tickets are released and early bookers try to secure the best deal for the best flight times.
The first release of tickets will be for the period from 28th October 2018 to 3rd February 2019 which obviously includes Christmas 2018 and New Year 2018/19. These will go on sale on Thursday, 12th April.
Then a fortnight later on Thursday 26th April 2018 tickets will go on sale for travel between 4th February and 24th March 2019 which includes the peak February half-term week.
Easter 2019 is three weeks later than this year and towards the end of the period it can occur, on 21st April, and EasyJet have not yet announced when tickets will go on sale for that holiday period.