Indeed, Royal Caribbean allows cancellations for up to 24 hours for certain reservations. 1 (877) 350-4939 or +44-204-515-5335As long as the check-in date is at least seven days away, travelers may cancel their bookings without incurring penalties under this policy within 24 hours of making the reservation. You may reach Royal Caribbean's customer support at 1 (877) 350-4939 for more information or help with a booking.