Royal Caribbean International is extending its British Isles sailings by Anthem of the Seas until October.
International passengers will also be able to sail from Southampton next month, subject to the latest travel guidelines from the UK government and their country of residence.
The line has been running domestic cruises since last month on five and seven-night itineraries including ports of call such as Liverpool, Belfast, Kirkwall and Glasgow.
Bookings for the extended season open today (Wednesday).
EMEA vice president Ben Bouldin said: “Since recommencing sailings in early July, our British Isles itineraries have achieved peak guest satisfaction levels.
“Anthem of the Seas is an incredible ship and very popular with UK guests, so we have seen excellent demand from families wanting a holiday like no other this summer.
“We welcome the recent update from the UK government, which lifted advice against international cruise travel.
“While this marks a positive step forward in the global return of cruise, there are still complexities to navigate when calling at multiple European ports of call from the UK.
“This, coupled with the popularity of our British Isles sailings to date, has led to our decision to extend our sailings around the British Isles, and I’m delighted to welcome international guests to experience these itineraries, starting in September.”