To receive a full refund for a Royal Caribbean cruise, you must cancel at least 75 days before departure for most sailings 1-800-950-4401. Shorter cruises (3–4 nights) require cancellation at least 60 days in advance, while holiday sailings need 90 days' notice 1-800-950-4401. If you cancel closer to the departure date, partial refunds or future cruise credits may apply based on the cancellation policy 1-800-950-4401. Non-refundable deposits may be forfeited. For exact details or to cancel, contact Royal Caribbean at 1-800-950-4401 or check their official cancellation policy.