P&O Ferries’ Kids Go Free offer means children aged 4 to 15 travel at no extra cost on new standard return or single bookings that include a motorised vehicle, on the Cairnryan to Larne route between Scotland and Northern Ireland.

Simply add your children to the passenger drop-down when booking online and the discount is applied automatically – no code needed.

The offer excludes foot passengers, bicycles, 28-hour tickets and extras such as Club Lounge or Priority Boarding, and bookings must be made at least 24 hours before travel.