No problem. That's actually tricky to find. You have to go to the customer support menu up top, then go to FAQ's. From there, you have to select "Air travel," which I think is under "Planning," then select the FAQ that says something like "What is the latest time to arrive before the cruise, and what is the earliest time to leave after the cruise?"
Actually, on my last cruise, I had the opposite problem. I booked I think a 1:00 pm flight out of Fort Lauderdale, with a 7:00 am docking in Port Everglades.
I think I was off the ship around 9:00, in a cab at 9:15, and at the airport at 9:30. At the check in kiosk, a prompt asked me "Do you want to get to your destination earlier for $50?" I actually said no, because then it would have cost me that, plus another $75 to get home.
2007 - Majesty of the Seas (Bahamas)
2009 - Enchantment of the Seas (Western Caribbean)
2010 - Freedom of the Seas (Western Caribbean)
2013 - Golden Princess (Alaska, roundtrip from Seattle)