Do I need a passport between Ireland and Britain?

Passport rules and airline requirements

Travel between the UK and Ireland falls under the Common Travel Area, which traditionally allows people to travel without a passport when both countries are involved. However, airlines and some carriers have their own identification policies, and those can override practical expectations at check‑in and boarding.

How rules are being applied now

• Carrier checks: Certain airlines are now requiring passports for travel on routes between Great Britain and Ireland, even though the Common Travel Area does not legally mandate one for everyone. At least one Irish carrier has announced that it will demand passports on those routes. Other airlines, including some UK carriers, continue to accept alternative photographic ID for eligible passengers.
• Booking surprises: Passengers who presume alternative ID will be accepted may find themselves booked on a carrier that insists on a passport; that can lead to denied boarding if they only carry other ID.

Practical advice

• Verify with the airline: Confirm the identification the airline you are flying accepts before you travel. Policies can differ by carrier and even by individual flight.
• Bring a passport when possible: Carrying a passport removes uncertainty and prevents last‑minute problems at check‑in or border controls.
• Check official guidance if unsure: Government pages for the UK and Ireland explain the Common Travel Area and any current temporary measures.

Why it matters

Airline ID requirements directly affect boarding and travel plans. To avoid being turned away at check‑in, confirm carrier policy ahead of departure and travel with a passport if you can.