After your first trip, you will be automatically registered in Oceania Cruises' multi-tiered Oceania Club loyalty program for previous passengers. Members get credits for the length of each voyage and progress through the tiers based on the overall...
Members of the Princess Cruises loyalty program at all tiers have access to special pricing on certain cruises as well as early booking discounts.
Disney's Castaway Club doesn't have as many perks as many of the other cruise lines. But, if you're a Disney fan, you'll benefit from the additional perks.
Norwegian Cruise Line's Latitudes Rewards program is a six-tier cruise loyalty program available to all passengers after their first sailing.
The Crown & Anchor Society is free to join, and even first-time Royal Caribbean cruisers get rewards.