Princess Cruises has prolonged lay-ups on some vessels to as late as mid-December amid the ongoing Covid-19 pandemic.

The Arnold Donald-led Carnival Corp brand has extended pauses for cruises sailing in and out of Australia on several ships through 31 October, including the 3,611-berth Majestic Princess (built 2017), 3,560-berth Regal Princess (built 2014) and 2,670-berth Sapphire Princess (built 2004).

Others staying away from Australia include the 2,000-berth Sea Princess and 2,000-berth Sun Princess (both built 1998).

In a separate statement, P&O Cruises said the extended pause in its operations in Australia would impact eight cruises by the 2,638-berth Pacific Explorer (built 1997), seven cruises by the 1,546-berth Pacific Dawn (built 1991) and four cruises on the 1,260-berth Pacific Aria (built 2015).

In New Zealand, P&O Cruises said it will return for its next season of sailings departing from Auckland in 2021, while the company will also cancel the inaugural 18-night cruise from Singapore to Sydney by the 2,600-berth Pacific Adventure (built 2001).

Sailings along California's coast, Asia, the Caribbean, Hawaii, Mexico, Panama Canal, South America, Antarctica, Japan, Tahiti and South Pacific have been suspended through 15 December.

"We share in our guests' disappointment in cancelling these cruises," Princess Cruises president Jan Swartz said in a statement.

"We look forward to the days when we can return to travel and the happiness it brings to all who cruise."

Princess Cruises will give either a future cruise credit up to 125% or full refunds to affected passengers. Travel agents will still receive commissions on cancelled voyages.

The cruise line, which just beat several coronavirus lawsuits, had previously extended its fleet lay-up to 30 June after placing a pause to 15 May.

All cruiseship owners have suspended operations and plan to resume sailings at different dates during the second half of 2020.