We fly back to Texas, too, and in the past we've usually taken a flight leaving around 3 or 4 PM. That allowed us to pack up, check the luggage with Bell Services, have a nice sit-down late breakfast or early lunch (10:30 or 11:00) near our resort, then leave for the airport around 12:30 or 1. And we'd get home early enough to have supper, unpack and go to bed around roughly normal time.
This past trip, airfare was much cheaper for us to take a flight leaving around 7 PM. We visited MK for a couple of hours, had a late lunch (1:30), then headed to the airport. We got to bed later than normal but were able to sleep in the next morning.
However, it's just two of us, no kids, and I know that makes a difference. The airfare difference is important too - is it $240 per person you'd save, or a total of $240? I think for $240 per person I'd take the later flight, but that assumes no one has to get up for work or school the very next morning.