Deal watch: 'cyber sale' at Princess brings free upgrades, more

Princess Cruises is celebrating Cyber Monday with another "3 for free" promotion that brings on-board spending credits and other perks with new bookings.

Available through Nov. 30, the sales event encompasses more than 600 sailings of six days or more taking place from summer 2017 to spring 2018.

Customers who book a six- to nine-day cruise will get a spending credit of $150 per cabin. Cruises of 10 to 12 days bring a $200 credit while longer voyages come with a $300 credit.

In addition to an on-board spending credit, customers who book during the promotion will get an upgrade to the best available cabin within the category they book and free on-board gratuities.

Yet another giant new ship on the way for Princess Cruises

The offer is available to residents of the United States, Canada, Mexico and Bermuda.

For a deck-by-deck look at Princess' newest ship, Regal Princess, click through the carousel at the top of this story.