We made a 10:20 am flight with Disney transportation and had plenty of time. We checked in at the Port and only had to walk to the gate. We did not rush off either but did have early seating for breakfast.
But you may want to wait until alot closer as more flights may be on the schedule, I know some don't release their schedules until a few months before and that is usually when you have the sales. Unless it is a major holiday, but we got our Sunday after Thanksgiving less than 4 months out and the rates did go way up shortly after but came way back down cheaper than what we bought ours.