Pretty much the same as any other city serviced by most airlines, I guess just use the usual suspects (southwest, kayak, orbitz, expedia, etc).
The problem with flying out of SMF is that direct flights to MCO are fairly limited as most of the time, you will have to have a stop and maybe a switch of planes. I've entertained the idea of driving to SFO and flying out, but the cost of driving and parking there, is offset by the higher fare and less stressful airport experience at SMF.
I am flying on southwest and jetblue this time around. Southwest was only $160 (before taxes and fees), while jetblue was more expensive. But for the dates, it wasn't much more than southwest, only $25, and the time for my jetblue flights was better.