Princess '3 For Free' sale offers upgrade, excursion and on-board credit

Running through Nov. 20, the sale offers the best stateroom available within that stateroom type for the lowest fare. In port, a free excursion credit will give cruisers on Europe and Japan sailings $200 ($100 per person) to spend on tours. In Alaska, travelers will receive $100 ($50 per person) for excursions.

In addition, travelers booking Europe or Japan cruises will receive up to $100 per stateroom in on-board credit and up to $50 per stateroom for Alaska cruises and land and sea packages.

Customers can also book third and fourth berths in a stateroom starting at $199 and receive up to $100 bonus shore excursion credit per stateroom and up to $50 bonus on-board credit per stateroom.

The '3 For Free' sale is available now to residents of the US, Canada, Puerto Rico and Mexico.