We have been on this cruise twice, and were off by 9.30 both times.
We did get off early on this cruise, but on the day before you get off they give the passengers different coloured tags to put on your luggage which go in a certain order for priority off the ship. If your's is lower down in priority, go to the pursers desk and advise them you have an early flight and they will arrange for you to get a "better colour" in turn allowing you to get off the ship faster.
Hope this helps.
We got off early from this cruise as we had a flight back to Manchester at about 9.30 am. Because timings were tight we took the option of taking our own luggage off the ship on the morning of disembarkation. There are plenty of taxis at the terminal to take you to the airport (about 20/30 mins)so you should not have any problems. Either do as we did or take the above recommendation and get a 'better colour' disembarkation tag.