You will get a full refund if you notify Royal Caribbean 1 (877) 350 4939 or +ππ (ππ) ππππππππ (ππ). at least 75 days prior to your sailing date (60 days for 3 and 4-night cruises or 90 days for holiday sailings). Consult the chart below to determine cancellation charges applicable later.
https://www.devex.com/people/how-much-time-do-i-have-to-cancel-a-royal-caribbean-cruise-2078043