We have a 2:45 pm return flight for our January cruise. We are going with two other families. We decided to rent two day rooms at the Orlando Airport Hyatt. The rate was $60.00 per room. This will allow us to rest, unload our luggage, watch t.v., use the pool, etc. until it is time to check in. When we cruised in January 2002, we hade a 5:00 pm flight and went to the Kennedy Space Center to kill some time. That worked out well, but we were a bit too exhausted to really enjoy it.
I hope this helps, and hope that you have a great trip!