Hmmm. well ok then. For anyone that hasn't already booked a same day flight an is curious as to whether that's a good idea or not, you can read the above responses and gain some insight.
Tim, I agree that 6AM seems like a safe flight. You should also look at the schedules and see what other flights go out that day too in case yours is canceled and you have to take another flight. If you have that info handy, you can use your cell phone at the airport and call the airline and rebook before the other passengers can make it to the ticketing counter and suck up all the seats.
Carnival Cruise Lines:
Fantasy 90, Celebration 95, Victory 05, Conquest 05, Spirit 6/06, Freedom 6/08, Holiday 7/08, Victory 6/09, Valor 9/09, Dream 6/10, Splendor 8/10,Conquest 8/11,Magic 11/11,Triumph 4/12,Spirit 7/12,Freedom 11/12, Triumph 2/13 - The fire cruise
NCL Dream October 2006, RCCL Mariner OTS June 2007