Passports: Do Britons need a passport to travel to Northern Ireland – why is this?
Express.co.uk | February 18, 2019
Do Britons need a passport to travel by plane to Northern Ireland? There are many direct flight routes between England and Northern Ireland, particularly to the capital, Belfast. Officially, UK citizens do not require a passport to enter Northern Ireland, but carriers by air or sea require some form of identification with a photograph. This means it is usually wise for UK travellers to have their passport to hand, for simplicity. Other forms of acceptable identity include a driving license with a photograph.