IMHO, no. We have gone to WDW many times a year and have flown out of either MCO or TPA. MCO, in my opinion, has some of the slowest security lines. Plus, you are planning on not having to wait for your seats. I have had to wait up to 30 minutes at Chef Mickey's. That would put you to 11:45. Even if you eat in 30 minutes, that will be 12:15. You then have to walk to your car, drive to the airport, wait to turn it in (that's a popular flight time). I always get to MCO 2 hours before my flight time. I mean, in the security line 2 hours before my flight time. Remember flights begin to board 20 minutes before their take off.