What happens if the cruise fare of my new sailing is different from my original sailing?
Temporary Policy: Cruise Date Flexibility – Frequently Asked Questions
Standard prevailing rates apply and you are responsible for any balance due after the reservation has been modified.
If the value of your current reservation exceeds the cost of your new sailing, the difference will automatically be refunded in the original form of payment. Any cancellation fees applicable to the original sail date will not be refunded.