How far is it from hull ferry port to holyhead port?

The ports of Hull and Holyhead are not near each other. Hull is located in the northeast of England, on the coast of the North Sea, while Holyhead is located on the island of Anglesey in Wales, facing the Irish Sea. The shortest distance between the two ports as the crow flies is approximately 155 miles (250 kilometers), but the actual distance by sea is much greater, as it is necessary to go through the Irish Sea and around the Isle of Man.