Norway's Hurtigruten is calling off cruising operations until 2021.
The company said it has decided to cancel all Expedition cruises after an increase in Covid-19 cases across Europe and South and North America.
"Hurtigruten is closely monitoring the developments regarding Covid-19," the cruiseship and ferry operator said on Thursday.
"We are proactive when it comes to the health and safety of our guests, crew and staff as this is Hurtigruten's number one priority."
Hurtigruten added: "Our goal is to resume operations in January 2021."
The company's website lists five ships in its Expedition fleet.
The vessels had been idled when European lockdowns were implemented earlier this year, but limited operations resumed in the summer.
These were halted again in early August when Covid-19 broke out on the 21,800-gt expedition cruiseship Roald Amundsen (built 2019).
At the time, the Norwegian cruiseship and ferry operator's chief executive, Daniel Skjeldam, described the decision to suspend the recently relaunched cruises until further notice as being "the only responsible choice".
A total of 36 crew members on the Roald Amundsen tested positive for Covid-19 despite strict protocols to prevent such an occurrence.
Cruiseships for Tom Cruise
Earlier this month, it emerged that Hollywood megastar Tom Cruise had chartered two of the cruise vessels for work on his latest film in Norway.
The 58-year-old Top Gun actor booked the 6,300-gt Vesteralen (built 1983) and 21,800-gt Fridtjof Nansen (built 2019) to help complete Mission Impossible 7.
Norway Today reported that Fridtjof Nansen is acting as a hotel ship for 400 members of the film's crew off the village of Hellesylt.
The use of the Vesteralen was not made clear. There has been speculation it could feature in the blockbuster itself.
Hurtigruten's coastal ferry operations are continuing.
