Dzneelvr, you're definitely on the correct path. You should be able to get a good fare on that route and the 2-hr drive to Vero is a very simple drive. Car rentals are easy at Sanford. Then head south on TOLL 417 (Seminole Expressway/Central Florida Greeneway), east on TOLL 528 (Beachline Expressway (formerly Beeline Expy)) and south on I-95.
As previously mentioned, airfares to Melbourne are usually high; ditto West Palm Beach. Plus with those cities, you could not fly out of Rockford.
BobK/Orlando