We are currently booked on a 5 day Destiny and want to change to a 7 day Splendor within the same week. Will there be a penalty?

If you are in the penalty phase, then yes.

That generally means anytime after the final payment due date: usually 75-90 prior to sailing.

there will be one if you booked the saver fare #50.00 a person. but that is fairly new fare.so chances are you didnt

If outside of penalty no. If inside of penalty it can depend on several variables. One of them being how far you are inside of the penalty period, and a $50 service fee would apply at the minimum.

Dwayne

I just wanted to add that now that there are Early Saver Rates out there.... there are different penalty rules for those.

That is a very good point. Those rules are quite different. tim c mentioned about the $50 per person fee as well that applies to changes with Early Saver rates.

Here is a link to the Early Saver rules.

Dwayne