* Regent Seven Seas Cruises: The luxurious Seven Seas Voyager sails round-trip from Southampton, England, on a 12-day cruise that visits Dublin, Ireland; Killybegs, Ireland; and Cobh, Ireland.
* Silversea Cruises: The elegant Silver Whisper sails round-trip from Copenhagen, Denmark, on a 13-day cruise that visits Dublin, Ireland; Belfast, Northern Ireland; and Galway, Ireland.
* Viking Ocean Cruises: The modern Viking Star sails round-trip from London (Greenwich) on a 12-day cruise that visits Dublin, Ireland; Belfast, Northern Ireland; and Cork, Ireland.
Mainstream Cruises
* Norwegian Cruise Line: Norwegian Cruise Line's Norwegian Escape sails round-trip from Southampton, England, on a 14-day cruise that visits Dublin, Ireland; Belfast, Northern Ireland; and Cobh, Ireland.
* MSC Cruises: MSC Cruises' MSC Meraviglia sails round-trip from Genoa, Italy, on a 7-day cruise that visits Dublin, Ireland; Belfast, Northern Ireland; and Cork, Ireland.
* Costa Cruises: Costa Cruises' Costa Smeralda sails round-trip from Savona, Italy, on a 7-day cruise that visits Dublin, Ireland; Belfast, Northern Ireland; and Killybegs, Ireland.
Budget Cruises
* Fred. Olsen Cruise Lines: Fred. Olsen Cruise Lines' Boudicca sails round-trip from Dover, England, on a 10-day cruise that visits Dublin, Ireland; Belfast, Northern Ireland; and Cobh, Ireland.
* Saga Cruises: Saga Cruises' Spirit of Discovery sails round-trip from Dover, England, on a 12-day cruise that visits Dublin, Ireland; Belfast, Northern Ireland; and Galway, Ireland.
* P&O Cruises: P&O Cruises' Britannia sails round-trip from Southampton, England, on a 7-day cruise that visits Dublin, Ireland; Belfast, Northern Ireland; and Cork, Ireland.
Small-Ship Cruises
* Hebridean Island Cruises: Hebridean Island Cruises' Hebridean Princess sails round-trip from Oban, Scotland, on a 7-day cruise that visits Dublin, Ireland; Belfast, Northern Ireland; and Glasgow, Scotland.
* Noble Caledonia: Noble Caledonia's MS Island Sky sails round-trip from Edinburgh, Scotland, on a 14-day cruise that visits Dublin, Ireland; Belfast, Northern Ireland; and Glasgow, Scotland.
* Swan Hellenic: Swan Hellenic's MS Minerva sails round-trip from Dover, England, on a 12-day cruise that visits Dublin, Ireland; Belfast, Northern Ireland; and Galway, Ireland.