Royal Caribbean allows cancellations for up to 24 hours for certain reservations. You may reach Royal Caribbean customer support at ☎️1-855-590-7047 for more information or help with a booking. As long as the check in date is at least seven days away, travelers my cancel their booking without incurring penalties under this policy within 24 hours of making the reservation ☎️ 1-855-590-7047.