No, but as with all domestic flights, the airline will want some proof of ID;
Acceptable form of non-photographic ID:
In theory, no. However, most airlines will not allow anyone to board an aircraft without acceptable ID and a current passport is the most acceptable form of ID. You should really speak to Easyjet and see what other form of ID they might accept, alternatively take the ferry.
No- not if you are British or Irish. All other nationalities -Yes
does my passport need to be in date to go to belfast
No
No, Belfast is in Northern Ireland which is part of the UK - you don't need a passport to travel from one part of the country to another.
No
No but you do need I.D.
Yes
No, you shoudn't because it is part of the United Kingdom.
No but you will need photographic identity. Check wit the ferry company.
NO
Yes - you will need to show it on arrival in Prague and to leave Northern Ireland.
You will certainly need a passport - since Ireland is off the UK mainland.
A passport money for ticktes and a plane would help.