Belfast Airport Passports You will need a valid passport to enter the Republic or Northern Ireland. Air and sea carriers require some form of photo identification (usually either a passport or driving licence), so ALWAYS check what form of ID is required with your individual airline, ferry company or travel agent before travelling. While e-passports are commonly used now, you don't need one to enter Ireland. Visas Visas for the Republic of Ireland A person in possession of a Hong Kong SAR or British National Overseas (BNO) passport does not require an entry visa. A person in possession of a Hong Kong Document/Certificate of Identity requires an entry visa. For further information and guidelines, please visit the Embassy of Ireland If you do not hold a Hong Kong SAR or British National Overseas (BNO) passport, please visit Irish Nationalisation and Immigration Service (INIS) to see if you require an entry visa to visit the Republic of Ireland. Visas for Northern Ireland If you hold a BN (O) or Hong Kong SAR passport and intend to stay in the UK for six months or less as a visitor you do not normally need to apply for a visa before travelling. But some categories of visitors do require visas. For further information and guidelines, please visit the UK Border Agency – Hong Kong. Recommended reading Travel Essentials Use our travel essentials checklist: everything you need to know from pets to public holidays, languages and more. Customs and Borders Before you get on that plane, take a look at the customs and borders procedures you can expect when you step off. Travelling in Ireland Whether it's by air, road or sea, we've got the lowdown you'll need on any mode of travel around the island.