If it were me booking a flight out NO WAY would I consider booking one before noon! We have done that twice and both times the ship hasnt cleared early enough for us to get off, get to the airport, get through the nasty security lines they seem to always have when we have NO time to stand and wait and we miss our plane! I would book it after 12 or 12:30 just to make sure you actually get to go home (not that it would be all bad to stay but in an airport ewww)
Just our personal preference. Some people have made 10:30 flights but to me it isnt worth it. I can get off the ship, leisurely get to the airport and have no stress while waiting! We usually get a snack at the airport snack bar, play cards while wasting time or let the kids watch a DVD on the laptop while we wait.
Heidi