Rosslare to Roscoff ferry crossings connect Ireland to northern Brittany. The crossing is operated by Irish Ferries. Irish Ferries sail up to two times per week with an approximate journey time 17 hours and 30 minutes.

Rosslare lies on the southeast coast of Ireland while Roscoff is the most westerly port in France. The port of Rosslare is a popular departure point as it offers direct ferries to France. Therefore this negates the need to travel to the UK first.

Roscoff on the other hand has excellent road networks leading to and from the port. Hence it is ideal for those intending on staying in Brittany itself or for travelling onto other regions of France.