cuppycake...not sure exactly where you will be relocating to, but there are other options. Of course the biggest airport is STL (Lambert Airport), which has the most options for flights to MCO. As DisneyDadof3 said, there is Aliegent Airlines, based at the MidAmerica Airport (right next to Scott Air Force Base), but as he also mentioned it does have limited service and actually flies into Sanford I believe. Another possibility, depending upon where you will be located, is Bloomington, Illinois. It is about 2 hours from St. Louis and AirTrans flies out of there. I think there might be other airline options with Bloomington, but not sure.
I actually live about 2.5 hours southeast of STL, only 15 mins. from the intersection of Interstates 57 and 24 in southern Illinois, so I even look at Nashville, TN, Evansville, IN as viable flight options if the price is right.
So, depending on your relocation, there might be a few options for your flights to MCO. And may I be the first to welcome you to the midwest...St. Louis has so many great offerings for families...the City Museum, the St. Louis Zoo, the Magic House, Science Center, Purina Farms, the Arch and the great museum under it...so many neat things!