Ferry company Stena Line will operate a new temporary weekend service between Holyhead and Belfast, starting on June 25.
The extra capacity on the new route from Holyhead will be available until July 18.
Stena Estrid (pictured), one of Stena Line’s newest ships, will provide the service, with an estimated crossing time of about eight hours.
The ferry company said it is experiencing “very high demand” on its Belfast routes to Cairnryan and Liverpool so the temporary service will provide much needed additional capacity to and from Northern Ireland.
Fares start at £130 for a car and driver with sailings departing Holyhead at 23:30 on Friday and Saturday nights, and departing Belfast at 09:30 on Saturday and Sunday mornings.
Paul Grant, Stena Line trade director (Irish Sea), said: “The much-anticipated summer rebound for travel is beginning and we are hugely encouraged by current booking trends.
“The current travel restrictions between Britain and Ireland have created a lot of pent-up travel demand so hopefully the addition of this new route will help provide another option for people visiting friends, relatives or taking a break, as well as being an attractive option for our freight customers.”