This bid-based system, in partnership with PlusGrade, gives passengers the opportunity to secure an upgrade to ocean-view, balcony, deluxe balcony, mini-suite and suite.

Starting Sept. 6, upgrades will be available initially on five North America-based ships — Caribbean Princess, Discovery Princess, Enchanted Princess, Regal Princess and Ruby Princess — with plans to roll out fleetwide by the end of October.

How it works

Here’s how Princess Upgrade works: Once the sailing is within the final payment period and full payment has been made, passengers will receive an invitation to take part in the program and submit a bid. They can bid on any higher stateroom category. They can change or cancel their bid any time before it is accepted.

If passengers miss the Princess Upgrade invitation e-mail, there will be a link on so they can initiate the process without going through the e-mail.

Additional details are here.