If you're staying at a Disney hotel, there are more advantages to flying out of Buffalo than just price. When arriving at MCO, you are not required to collect your luggage - it will be transported directly to your room for you. Also, when flying home, Disney will have you boarding passes printed for you and you check your luggage right at your resort. You don't have to transport you own luggage at all, which would be a huge advantage when travelling alone with 3 children. For me, even if the price was the same I would still fly out of Buffalo for these advantages. It's just worth it to me.